Grooving tool for a sawing machine

Abstract

The present invention provides a creasing tool (35) for a sawing machine, the creasing tool (35) comprising a disk-shaped blade body (310) formed to be rotatably driven about a rotation axis (DV) and having flat surfaces (311, 312) facing opposite to each other, the blade body having a machine receiving portion (315) at a center (ZV) penetrated by the rotation axis (DV) for detachably mounting to a creasing device tool receiving portion (34) of the sawing machine (10). and a score tooth arrangement (300) for making a score (RI) on a first work surface (WO) of the workpiece (W) at a radial outer periphery (313) relative to the rotation axis (DV), the score tooth arrangement (300) extending transversely to the flat surfaces (311, 312). At least one main cutting edge (350) for making a score bottom (RB) of the score (RI), and at least one main cutting edge (350) extending transversely to the at least one main cutting edge (350). ) on opposite sides of the rotation axis (DV), and a secondary cutting edge (351) for creating a lateral side (RF) of the score (RI), and an end region (355) of the secondary cutting edge (351) provided for cutting a score into the workpiece, which is radially inward with respect to the rotation axis (DV), has a radial distance (RD) to the radial outer periphery (313) of the score making tool (35), and the radial distance is The score (RI) can be made to various depths up to x), and the sawing machine (10) can make saw cuts (SAE) aligned with the score by the saw tool (15) into the workpiece from a second workpiece surface (WU) opposite the first workpiece surface (WO) of the workpiece with a saw cut width (SBB) of the SAE smaller than the score width (RBB) of the score (RI), thereby preventing the score side (RF) of the workpiece (W) from being torn off. The score tooth arrangement (300) has only one score tooth (301-304) or at least two score teeth (301-304) having an angular distance (WA) of at least 20° from each other relative to the rotation axis (DV).

Description

Technical Field

[0001] The present invention relates to a grooving tool for a sawing machine, in particular a hand-held sawing machine or a semi-stationary sawing machine, or as a component of this sawing machine. The grooving tool is formed to be driven rotatably about a rotation axis and comprises a disc-shaped blade body having flat surfaces facing each other. The blade body has, at a center penetrated by the rotation axis, a mechanical housing portion for detachably attaching to a tool housing portion of a grooving device of the sawing machine, and, on a radially outer periphery with respect to the rotation axis, a grooving tooth arrangement for grooving a first work surface of a work. The grooving tooth arrangement has at least one main cutting edge for producing a grooving bottom of the groove, extending transversely to the flat surface, and at least one secondary cutting edge for producing a grooving lateral surface of the groove, transversely to the at least one main cutting edge and on opposite sides of the at least one main cutting edge. An end region of the secondary cutting edge provided for grooving the work on the radially inner side with respect to the rotation axis has a radial distance from the radially outer periphery of the grooving tool. The radial distance enables grooves of various depths to be produced up to a maximum depth limited by the radial distance using the grooving tool, and the sawing machine can make a saw cut aligned with the groove from a second work surface opposite to the first work surface of the work with a saw cut width smaller than the groove width of the groove, so that the grooving lateral surface of the work is not peeled off. The present invention relates to such a grooving tool.

[0002] The present invention also relates to a system comprising a grooving tool and a sawing machine having the grooving tool and a sawing tool.

Background Art

[0003] This type of grooving tool is described, for example, in connection with a grooving device according to European Patent Application Publication No. 0324444. The grooving tool has conical cutting teeth, i.e., a main cutting edge disposed between secondary cutting edges, and the secondary cutting edges extend obliquely, i.e., form teeth that taper conically. By the oblique extension of the secondary cutting edges, various widths of the grooves to be produced can be defined, whereby various saw blades, which can also be referred to as main saw blades, can be used in a hand-held sawing machine.

[0004] A hand-held sawing machine equipped with a grooving unit is known, for example, from German Utility Model No. 7324551, German Utility Model No. 9106212, and US Patent No. 5287786.

[0005] From Chinese Utility Model No. 201257550, a grooving tool capable of grooving the surface of a workpiece can be read. The grooves produced in this way can also be for decoration. These grooves are not suitable for making saw cuts with a saw blade from the opposite side of the workpiece.

[0006] International Publication No. 2019 / 147181 describes a saw blade for woodworking.

[0007] US Patent No. 5,713,259 describes a saw blade for a high-speed saw.

[0008] US Patent Application Publication No. 2008 / 0301954 relates to a pneumatic sawing machine.

[0009] Further saw blades are described in German Patent Application Publication No. 102004001960 and European Patent Application Publication No. 1741508.

[0010] At least the grooving tool known from European Patent Application Publication No. 0324444 cannot produce satisfactory grooves for subsequent saw cuts.

Prior Art Documents

Patent Documents

[0011]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Patent Document 6

Patent Document 7

Patent Document 8

Patent Document 9

Patent Document 10

Summary of the Invention

[0012] Therefore, an object of the present invention is to provide an improved means for creating the streaks provided for making the next saw cut.

[0013] In order to achieve the above object, in the streak-forming tool of the type described at the beginning, it is contemplated that the streak tooth arrangement has a single streak tooth or at least two streak teeth having an angular distance of at least 20° from each other with respect to the axis of rotation.

[0014] The basic idea of the present invention is that the knurling teeth have few knurling tooth arrangements, or at least have knurling teeth with relatively large angular distances or arc distances from each other. In that case, the basic idea is that few knurling teeth are sufficient to produce a sufficient quality of knurling, and at the same time, the knurling tool shows little wear.

[0015] It is advantageous that the knurling tool is designed and formed to produce a knurling at a limited maximum depth.

[0016] It is advantageous that the saw tool is formed and designed to produce a saw cut for cutting the workpiece.

[0017] Advantageously, for the prescribed working operation of the knurling tool, it is intended that the knurling tool only knurls the workpiece and does not cut.

[0018] The saw tool is formed and / or designed to enter the workpiece at an entry depth that is, for example, greater than that of the knurling tool.

[0019] Knurling tools can be used to produce knurls of various depths, but this is not possible with knurling tools of the type described at the beginning, for example, according to the specification of Chinese Utility Model No. 201257550. When adjusting the depth of this type of knurling tool relative to the main unit or the guide surface of a sawing machine that slides along the workpiece, knurls of a much larger width, at least significantly larger than the width of the saw cut produced by the saw tool, will occur.

[0020] It is preferable that the adjustment range regarding the maximum depth is such that the radial length of the sub-edge tip to the radial outer periphery of the grooving tool that determines the radial distance, i.e., the maximum depth of the groove, is at least 1.2 mm. The radial distance or the maximum depth is preferably even larger, i.e., for example, 1.5 mm, 2 mm, or more preferably at least 2.3 mm, 2.4 mm, or 2.5 mm. Thereby, a groove with a maximum of 2.5 mm can be produced. It is also advantageous when the radial distance is, for example, 3 mm, whereby a groove up to this depth can be produced with the grooving tool.

[0021] The groove teeth preferably have a particularly large angular distance. For example, the angular distance between the groove teeth arranged successively on the radial outer periphery of the blade body, i.e., arranged successively in the circumferential direction of the blade body or the grooving tool, is at least 30°. For example, a larger angular distance of 45°, 60°, or even 90° is preferable. The angular distance can also be 180° or 360°.

[0022] These angular distances can be provided between all the groove teeth. However, it is also possible for the grooving tool to have groove teeth with different angular distances relative to each other. However, it is preferable that at least two, preferably all, of the groove tooth arrangements have the same or substantially the same angular distance from each other.

[0023] It is more suitable for the groove tooth arrangement to have a maximum of six groove teeth, preferably a maximum of five groove teeth. A maximum of four groove teeth or three groove teeth is even more preferable. It is also possible to arrange only two groove teeth or only one groove tooth on the outer periphery of the grooving tool.

[0024] Basically, it is possible for the sub-edge tips to extend parallel to each other, i.e., for the sub-edge tips to be parallel to the surface of a flat surface or a flat surface, for example. However, the sub-edge tips can also extend obliquely, conically, curvedly, or the like.

[0025] For example, the radially outer end region of the secondary cutting edge, i.e., the region of the secondary cutting edge that is disposed adjacent to the primary cutting edge or transitions to the primary cutting edge, has a first lateral distance parallel to the axis of rotation, whereas the end region of the secondary cutting edge that is radially inner with respect to the axis of rotation and is intended to cut a grain into the workpiece has a second lateral distance parallel to the axis of rotation. It is possible to create grains up to these end regions of the secondary cutting edge. The first lateral distance determines the width of the grain at the bottom of the grain, and the second lateral distance determines the maximum width of the grain on the first workpiece surface of the workpiece. The second lateral distance is preferably at least as large as the first lateral distance. It is preferred that the second lateral distance is the same as the first lateral distance, i.e., the secondary cutting edges extend parallel to each other at right angles to the axis of rotation. However, it is also possible that the second lateral distance is up to 1.5 mm, preferably up to 1 mm, or even only 0.8 mm or 0.7 mm larger than the first lateral distance. The second lateral distance can also be made up to 0.5 mm or 0.6 mm larger than the first lateral distance. A variant in which the second lateral distance is up to 0.4 mm or 0.5 mm larger than the first lateral distance is preferred.

[0026] At least one grain tooth, preferably a plurality of grain teeth, or all grain teeth of the grain tooth arrangement can each have two secondary cutting edges, and a primary cutting edge can extend between these two secondary cutting edges. Thus, in that case, such a grain tooth provides or has not only a primary cutting edge but also two secondary cutting edges on opposite sides of each other.

[0027] However, it is also possible to provide serrated teeth that perform the cutting function only on one flat surface of the blade body and not on the other flat surface. Therefore, in one embodiment of the present invention, the serrated tooth arrangement has at least two serrated teeth arranged one behind the other in the circumferential direction of the blade body, and the sub-edge tips of these serrated teeth project in front of the flat surfaces on opposite sides of the blade body, and it is contemplated that these serrated teeth do not have sub-edge tips in the area of the other flat surface or do not have sub-edge tips that project in front of the other flat surface. Therefore, the serrated teeth on one flat surface cut a part of the serrated lateral surface, and the other serrated teeth on the opposite flat surface cut the serrated lateral surface located on the opposite side of the above-mentioned serrated lateral surface.

[0028] The sub-edge tip can extend, for example, in an arc shape or a concave shape. Therefore, the sub-edge tip can form a spherical contour.

[0029] A preferred concept contemplates that the sub-edge tip and / or at least one main-edge tip extend linearly. Therefore, basically, the sub-edge tip is linear and the main-edge tip is arc-shaped or curved, or the sub-edge tip extends in an arc while the main-edge tip is linear. For example, the sub-edge tip is linear and the main-edge tip extends convexly radially outward, whereby the serrated bottom can be made concave.

[0030] The sub-edge tip and at least one main-edge tip preferably form a trapezoidal shape in cross-section. In that case, it is advantageous if the trapezoid has a straight side edge or tip. However, it is also possible to interpret the trapezoidal shape as a shape in which the sub-edge tip and / or the main-edge tip are curved, particularly flatly curved, or extend flatly in an arc.

[0031] Furthermore, it is advantageous if the sub-edge tip is longer than at least one main-edge tip. Therefore, for example, relatively deep serrations can be produced. Therefore, the maximum depth of the serrations by the relatively long sub-edge tip is large, and / or the radial distance from the radially inner region to the radially outer region of the sub-edge tip is larger than the length of the main-edge tip with respect to an axis parallel to the rotation axis.

[0032] At least one main cutting edge and one secondary cutting edge form an angle with each other in their respective cutting regions. Therefore, it is advantageous if the main cutting edge and the secondary cutting edge have a cutting region in which they form an angle and at least one main cutting edge and each respective secondary cutting edge intersect at an angle. Needless to say, especially when one of the cutting edges has a bend or warp, it is also possible to provide a rounded cutting region between the main cutting edge and the secondary cutting edge.

[0033] The entire secondary cutting edge, or at least the region of the secondary cutting edge that intersects the main cutting edge, has an angle with each other of, for example, at least 90° or exactly 90°. However, this angle can be at most 105°, at most 100°, or at most 98°. It is also advantageous if the secondary cutting edge or each respective secondary cutting edge forms an angle with the main cutting edge of, for example, at most 97° or 96°, especially 95° or 94°. For example, the secondary cutting edge is flatly inclined at an angle of, for example, 0° to 10°, especially 0° to 7°, preferably 0° to 6° or 0° to 5° or 0° to 4° relative to the flat surface. The large angle between the main cutting edge and the secondary cutting edge is advantageous, for example, when the main cutting edge of a saw blade or the width variation of the cutting width for which a grooving tool for making grooves is assigned is small. However, when the variation of the main cutting edge or the cutting width of the saw blade is relatively small, since the width of the groove made by the grooving tool does not depend much on the depth of entry of the grooving tool into the fragment, it is more advantageous if the angle between the main cutting edge and the secondary cutting edge of the grooving tool is small.

[0034] The blade body preferably has an outer periphery that is substantially circular with respect to the axis of rotation. At least one main cutting edge, or a cutting body having a main cutting edge and arranged on the blade body, projects radially outward with respect to the axis of rotation at a radial distance in front of the outer periphery of the blade body. The radial distance is, for example, 0.5 mm to 1.5 mm, particularly preferably from 0.2 mm to 0.4 mm. The radial distance can be at least, for example, 0.1 mm to 0.15 mm. The radial distance is preferably at most 0.5 mm to 0.04 mm.

[0035] At least one secondary cutting edge, for example, a cutting body having a secondary cutting edge, preferably projects in front of each flat surface of the blade body on which the secondary cutting edge is arranged.

[0036] Accordingly, by the above two measures, it is achieved that the blade body itself does not come into contact with the grain produced, and only the cutting edge comes into contact. As a result, the generated friction and the resulting heat are reduced, so that the workpiece and, in addition, the grooving tool are protected.

[0037] At least one grain tooth of the grain tooth arrangement, preferably all of its grain teeth, has a cutting body arranged on the blade body, and this cutting body has the entire main cutting edge and secondary cutting edge, but at least a part of the secondary cutting edge. Preferably, that kind of cutting body has two secondary cutting edges on opposite sides of each other. The cutting body is made of a material harder than the blade body. Therefore, the blade body has relatively elastic properties, for example, while the cutting body is much harder and is optimally suitable for cutting into the workpiece.

[0038] A preferred concept contemplates that the cutting body has a Vickers hardness of at least 1500 HV, preferably 2000 HV, preferably at least 3000 HV. In that case, HV represents the hardness by Vickers. It is particularly preferred when the Vickers hardness of the entire cutting body, or the region of the main cutting edge or the secondary cutting edge, is at least 4000 HV, or rather at least 4500 HV. A preferred concept further contemplates that the cutting body is made of a non-metal. For example, the cutting body can be made of a ceramic material. Furthermore, in practice, it has been found that it is advantageous when the cutting body is made of a diamond material or a polycrystalline diamond material. The cutting body can also be made of, for example, a hard metal, that is, the cutting body has a hardness of, for example, about 1500 HV.

[0039] The blade body of the grooving tool preferably has a hardness of about 350 - 480 HV, particularly about 400 - 450 HV.

[0040] In that case, the basic idea is that the cutting body is relatively brittle due to its hardness, but this is not a problem for the material to be processed, i.e., the normal workpiece, especially in the coating of particle boards. Since the material of the workpiece to be cut or grooved by the grooving tool is of uniform quality, the cutting body is, so to speak, evenly loaded. In contrast, the core of the workpiece to be cut by a saw blade or saw tool may be provided with inclusions, hard parts or the like, but these do not damage the grooving tool. These inclusions or hard regions are cut by the saw blade or saw tool.

[0041] The cutting body is preferably supported by the blade body on the back surface with respect to the cutting direction in which at least one main cutting edge tip and at least one secondary cutting edge tip for cutting into the workpiece are provided, or on the back surface of the cutting body, in the region of the main cutting edge tip, and entirely or partially in the region of the secondary cutting edge(s), i.e., in the region of at least a part of at least one secondary cutting edge tip. Thus, a large driving force can be transmitted from the blade body to the cutting body. This is also the case with the following measures that are advantageously contemplated, namely that the blade body has a convex outer peripheral contour, for example an annular shape, with respect to the rotation axis on the back surface of the cutting body. Thus, i.e., the blade body is so to speak massive on the back surface of the cutting body and exerts a supporting action.

[0042] The blade body extends, preferably radially outward with respect to the rotation axis, up to the region of the main cutting edge tip next to at least one secondary cutting edge tip.

[0043] It is advantageous if, so to speak, in front in the working direction or the direction of rotation, there is a chip space for one or more rib teeth. Advantageously, it is contemplated that a chip space is arranged in front of at least one rib tooth of the rib tooth arrangement, preferably in front of all rib teeth, or in front of a plurality of rib teeth. The chip space can be formed, for example, like a depression. It is advantageous if the chip space extends radially inwards with respect to the axis of rotation in a V-shape or U-shape from the radially outer periphery of the blade body. The chip space has, for example, a limited angular range of up to 30°, preferably up to 20° or 15° with respect to the axis of rotation. A chip space over a larger angular range may have the disadvantage that it extends to the back or rear side of the rib tooth preceding in the direction of rotation, whereby the back of that rib tooth is not optimally supported by the blade body so to speak.

[0044] The blade body preferably has a substantially circular outer periphery with respect to the axis of rotation. On this outer periphery, preferably, only in the cutting direction in which at least one main cutting edge for cutting into the workpiece is provided, one chip space is provided in front of the main cutting edge, or a plurality of chip spaces are provided in front of each main cutting edge. In other cases, the blade body has a circular outer periphery, i.e., during the working operation of the grooving tool, the blade body enters with its outer periphery into a part of the groove to be produced.

[0045] Furthermore, it is advantageous to provide a system comprising a grooving tool for a sawing machine of the above-described type as defined in the preamble of claim 1 or of the type mentioned at the beginning, and a saw tool in the form of a saw blade for a sawing machine. That is, this system comprises two tools, namely a saw blade and a grooving tool. The saw blade comprises a disc-shaped saw blade body having flat surfaces facing each other, and the saw blade body has a mechanical receiving portion at its center penetrated by a rotation axis for detachably attaching to a sawing tool receiving portion of a sawing machine. On the radially outer circumference of the saw blade body with respect to the rotation axis, a saw tooth arrangement having saw teeth arranged in a circumferential sequence is disposed. However, the number of saw teeth of the saw blade is larger than the number of grooving teeth of the grooving tool. For example, the number of saw teeth is at least three times or four times as large as the number of grooving teeth of the grooving tool. In a system of the above-described type, even when the number of saw teeth of the saw blade is the same as the number of grooving teeth, it is advantageous if the material of the main cutting edge of the grooving tool is at least 50%, or at least 60% or 70% harder than the material of the main cutting edge of the saw blade extending transversely with respect to the flat surface of the saw blade. Here, it should be mentioned that the saw blade preferably also has secondary cutting edges, and the main cutting edges are respectively disposed or extend between the secondary cutting edges.

[0046] The semi-stationary sawing machine can be, for example, a chop saw, a mitre saw, a table saw, or the like. The hand-held sawing machine is preferably a plunge saw, but can also be a pendulum saw.

[0047] The outer diameter of the grooving tool is at most 50%, preferably at most 40%, particularly at most 30% of the outer diameter of the saw blade. Thus, the grooving tool is significantly smaller than the saw blade. It is also advantageous for the mechanical receiving portion of the grooving tool to be smaller than the mechanical receiving portion of the saw blade. For example, the inner diameter of the mechanical receiving portion of the grooving tool is half the size of the inner diameter of the mechanical receiving portion of the saw blade.

[0048] The ratio of the outer diameter of the saw blade to the mechanical receiving portion of the saw blade differs from the ratio of the outer diameter of the grooving tool to the mechanical receiving portion of the grooving tool by at most 30%, particularly by at most 20%.

[0049] It is advantageous if the blade body of the grooving tool has a greater thickness than the blade body of the saw blade. The thickness of the blade body is determined by the distance between the respective flat surfaces of the blade body.

[0050] It should be mentioned here that it is advantageous if the blade body of the saw blade and / or the grooving tool has a flat or flat surface. Basically, for example, the flat surface can have a certain warp or curvature, especially towards the machine housing part. In the case of the saw blade, the above-mentioned thickness of the blade body is preferably about 1 mm to 1.6 mm. The blade body of the grooving tool preferably has a thickness of about 1.2 mm to 2 mm.

[0051] It is advantageous if the cutting width of the grooving tool is greater than the cutting width of the saw blade. The cutting width of the grooving tool is preferably at least 0.05 mm greater than the cutting width of the saw blade, and preferably 0.1 mm greater.

[0052] Furthermore, it is advantageous if the cutting width of the grooving tool is 1.9 mm to 2.4 mm. The cutting width of the saw blade is preferably in the range of about 1.6 to 2 mm, preferably about 1.8 mm.

[0053] Furthermore, the present invention relates to a sawing machine comprising a system having the grooving tool and the sawing tool already described, for example, a hand-held sawing machine or a semi-fixed sawing machine. The sawing machine has a sawing tool housing part that is motor-driven by a sawing drive device for the sawing tool that makes a saw cut into the workpiece along the working direction. Furthermore, the sawing machine has a grooving unit having a grooving device tool housing part arranged in front of the sawing tool housing part in the working direction, especially a grooving device tool housing part for the grooving tool that is driven by a grooving device drive device.

[0054] The grooving device drive and the sawing drive are provided with, for example, separate electric motors. However, at this point, basically, the sawing drive or the only drive can form the grooving device drive by means of a corresponding transmission, for example a transmission drive, that is to say, it should be mentioned that the only drive or the sawing drive drives the grooving device tool receptacle, and the sawing tool receptacle, and the tools arranged thereon. Not only the drive of the sawing tool receptacle and the grooving device tool receptacle by a single electric drive motor, but also the drive by separate drive motors can implement the following measures without problems.

[0055] It is advantageous if, during the sawing operation of the sawing machine, the working rotational speed of the sawing tool receptacle is lower than the working rotational speed of the grooving device tool receptacle. The working rotational speed of the sawing tool receptacle can be variable, for example, by providing a potentiometer or other adjustment element for adjusting the rotational speed of the sawing drive. However, the range of the working rotational speed of the sawing tool receptacle is preferably selected such that the working rotational speed of the sawing tool receptacle corresponds to at most 50%, preferably at most 40% or 30% of the working rotational speed of the grooving device tool receptacle. For example, it is also possible to further lower the working rotational speed of the sawing tool receptacle, for example, to only 25% or 20% of the working rotational speed of the grooving device tool receptacle.

[0056] The typical range of the working rotational speed of the sawing tool receptacle is advantageously about 3000 revolutions per minute to about 7000 revolutions per minute, whereas the working rotational speed of the grooving device tool receptacle is preferably 15,000 revolutions to 25,000 revolutions per minute. The working rotational speed is, for example, the rotational speed of the sawing tool receptacle or the rotational speed of the grooving device tool receptacle, and these rotational speeds are adjusted or adjustable for a typical sawing operation of a hand-held sawing machine.

[0057] The grooving tool and the saw blade or saw tool are advantageously formed so as to operate at the aforementioned operating rotational speed and at the ratio of the operating rotational speeds of the grooving tool and the saw tool or saw blade, for example, by the grooving tool and the saw tool being made of materials suitable for their respective operating rotational speeds and / or having geometric characteristics suitable for their respective operating rotational speeds.

[0058] The operating rotational speed of the tool housing of the grooving device and / or the operating rotational speed of the tool housing of the sawing tool is preferably adjustable, for example, using a potentiometer or other adjusting means. It is preferable that the operating rotational speed of the tool housing of the sawing tool is adjustable and the operating rotational speed of the tool housing of the grooving device is constant.

[0059] The feed of the saw teeth and the grooving teeth into the workpiece respectively is more advantageously selected such that, in a typical manual operation, i.e., for example, the manual feed of a hand-held saw along the workpiece or of the workpiece along a semi-fixed sawing machine, i.e., at a typical average feed speed of about 2 to 6 m / min, it is 0.007 to 0.02 for the saw tool and 0.033 to 0.1 for the grooving tool. The feed is defined by the quotient of the (manual) feed speed, i.e., the relative speed between the workpiece and the sawing machine for making the saw cut, and the product of the rotational speed of each tool housing and the number of grooving teeth in the grooving tool or the number of saw teeth in the saw tool.

[0060] It is particularly advantageous if the grooving tool is driven in the form of a so-called synchronous saw. That is, it is advantageous if the feed direction in which the sawing machine and the workpiece are moved relative to each other to make a saw cut in the workpiece corresponds to the direction of rotation or rotational direction on the radially outer circumference of the grooving tool where the tangent is parallel to the feed direction. Thus, i.e., the grooving tool functions as a feed device during the working operation. This measure facilitates the grooving tool being driven at a higher rotational speed than the saw tool.

[0061] During the working operation of the sawing machine, it is advantageous if the sawing tool storage part and the grooving device tool storage part are driven in opposite rotational directions. Basically, it is of course possible for the sawing tool storage part and the grooving device tool storage part to be driven in the same direction.

[0062] It is advantageous that the ratio of the rotational speed of the sawing tool storage part to the rotational speed of the grooving device tool storage part can be adjusted, especially when the output rotational speed of the sawing drive device and / or the grooving device drive device is such that the cutting speed of the saw blade is in the range of about 50% to 200%, especially about 80% to 120% of the cutting speed of the grooving tool. For example, the sawing drive device and the grooving device drive device are electric motors with adjustable output rotational speeds. It is also possible that the rotational speed of the grooving device drive device is constant and the rotational speed of the sawing drive device can be adjusted to adjust the above relationship.

[0063] It is even more advantageous if the ratio of the rotational speed of the sawing tool storage part to the rotational speed of the grooving device tool storage part can be adjusted such that when the grooving device tool storage part and the grooving tool are combined, the product of the rotational speed at the radial outer circumference of the grooving tool and the number of grooving teeth is at most 80%, preferably at most 60%, more preferably at most 40% or 30% of the product of the rotational speed at the radial outer circumference of the saw blade and the number of saw teeth. These two products of the number of teeth and the relevant rotational speed of the tool storage part are the quantities that determine the feed per tooth, and in the feed per tooth, these products are the denominator of the quotient, and the numerator of the quotient is the relative feed speed of the sawing machine and the workpiece.

[0064] Some advantageous forms regarding the dimensions of the saw blade and the grooving tool can be mentioned. That is, for example, the saw blade has a diameter of 150 to 180 mm. In the case of the grooving tool, an outer diameter of at most 75 mm, preferably at most 60 mm or 50 mm is advantageous. The mechanical storage part of the sawing tool has a diameter of, for example, about 15 to 30 mm, preferably about 18 to 22 mm, especially about 20 mm. The mechanical storage part of the grooving tool preferably has a diameter of about 6 to 8 mm, especially about 6.5 mm or 1 / 4 inch.

[0065] In any case, it is preferable that the ratio of the outer diameter to the diameter of the mechanical housing portion in the grooving tool and the saw blade is about 7 to 9, preferably about 7.4 to 8.5. However, in practice, in the saw tool or the saw blade, it is also possible and advantageous that the ratio of the outer diameter to the diameter of the mechanical housing portion is in the range of about 7.5 to 10. In the case of the grooving tool, the ratio of the outer diameter to the diameter of the mechanical housing portion can be in the range of about 5 to 13.

[0066] Advantageously, the ratio of the outer diameter of the saw blade to the outer diameter of the above or one sawing drive motor that drives the sawing tool housing portion is larger than the ratio of the outer diameter of the grooving tool to the outer diameter of the above or one grooving device drive motor that drives the grooving device tool housing portion, particularly at least 1.5 times larger, preferably 2 times larger, and more preferably 2.5 times larger. For example, the sawing drive motor is an electrically rectified motor, while the grooving device drive motor is a universal motor or a DC motor. The sawing drive motor has, for example, greater power and / or greater torque than the grooving device drive motor.

[0067] A hand-held sawing machine is a sawing machine that is manually guided along the workpiece. This machine can be freely guided on the workpiece, that is, it can be moved without a guide rail. However, it is preferable to move it using a guide rail. Preferably, the hand-held machine tool is a plunge saw, and / or does not have a protective cover for the portion of the saw tool and / or the grooving tool that freely protrudes in front of the guide surface.

[0068] The saw unit and the grooving unit are arranged on the upper surface of the guide device on the side opposite to the guide surface. The guide device includes, for example, a so-called saw table. The guide device or the guide body preferably includes a plate body with a guide surface arranged on one side and the saw unit and the grooving unit arranged on the side opposite to the guide surface or on the upper surface. On the guide surface, preferably, a guide housing portion for the guide rib or the guide protrusion of the guide rail, such as a longitudinal groove or the like, is arranged.

[0069] The sawing drive motor and / or the grooving device drive motor is preferably an electric motor, in particular a universal motor or a brushless electronically commutated motor or a DC motor. Different types of motors can be used as the sawing drive motor and the grooving device drive motor. For example, an electronically commutated motor can be used as the sawing drive motor and a DC motor can be used as the grooving device drive motor.

[0070] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

Brief Description of the Drawings

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Figure 17

Figure 18

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Figure 31

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Embodiments for Carrying out the Invention

[0072] The hand-held sawing machine 10 is formed, for example, in the form of a plunge saw, but may have, for example, a pendulum-type hood or such other protective cover, and can thus be a pendulum saw.

[0073] The hand-held sawing machine 10 comprises a saw unit 11 having a sawing drive motor 12, the sawing drive motor being accommodated in a motor housing portion 28 of the saw unit housing 13. The sawing drive motor 12 drives the sawing tool receiving portion 14 directly or via a transmission device not visible in the drawing, and the saw tool 15 can be or is arranged in the sawing tool receiving portion. In order to hold the saw tool 15 in the sawing tool receiving portion 14, for example, a holding screw or holding element 14A is used.

[0074] Using the sawing depth adjustment bearing 16, the entire saw unit 11 can be pivoted about the depth adjustment axis TS with respect to the guide device 17 in which the saw unit 11 is arranged. By such a pivoting movement, the saw tool 15 can be adjusted between the upper depth adjustment position OT and a plurality of lower depth adjustment positions, for example the lowest depth adjustment position UT according to FIG. 2 or FIG. 8. In the lowest depth adjustment position UT, the saw tool 15 projects in front of the guide surface 19 of the guide body 18 of the guide device 17, for example to make a saw cut in the workpiece W.

[0075] The guide surface 19 can guide the guide body 18, and thus the entire hand-held sawing machine 10, along the working direction AR, for example directly along the workpiece upper surface WO of the workpiece W. The guide surface 19 extends along a longitudinal axis L parallel to the working direction AR.

[0076] However, the guide body 18 can also be guided, for example, along the upper surface or the guide surface 202 of a guide rail 200 on which the lower surface 201 can be placed on the workpiece W. Thereby, a particularly accurate and straight saw cut can be made into the workpiece W.

[0077] The guide rail 200 has an elongated shape having longitudinal narrow surfaces 203, 204 that extend between the rear end face 207 in the working direction AR and the front end face 208 in the working direction AR along the longitudinal axis LS of the guide rail 200 in which the working direction AR is oriented. The saw tool 15 can enter the workpiece W beside this longitudinal narrow surface 204.

[0078] Furthermore, mating guide contours 206 in the form of longitudinal ribs and optionally receiving grooves 205 extend parallel to the longitudinal axis LS. The receiving groove 205 is used, for example, to accommodate auxiliary means, a clamping device for clamping and fixing the guide rail 200 or the like. The longitudinal rib or guide contour 206 protrudes upward in front of the guide surface 202 and is used to engage with the guide contour 216 on the guide surface 19 of the guide body 18. The guide contour 216 is formed, for example, as an elongated receiving groove 217 that extends along the longitudinal axis L of the guide body 18.

[0079] An alternative embodiment of the guide rail 200 is schematically shown, for example, in the form of a guide rail 200A. The guide rail 200A has a rear engagement projection 210 that protrudes in front of the guide surface 202 and from which at least one rear engagement leg 211, preferably two rear engagement legs 211 facing each other, protrudes laterally and transversely, forming, for example, a T-shaped structure. The rear engagement legs 211 engage with an optional receiving portion 220 provided on the guide surface 19 that has a rear engagement receiving portion 221. For example, the support leg 222 protrudes in the direction of the receiving portion 220 that can be engaged from behind by the rear engagement legs 211 that engage with the rear engagement receiving portion 221 on the plane of the guide surface 19. Thereby, the guide device 17 is held on the guide rail 200A in a force direction perpendicular to the guide surface 18, but nevertheless is displaceable in the working direction AR along the guide rail 200A. The receiving portion 220 and the rear engagement projection 210 have an elongated shape and extend in the direction of the longitudinal axis L or LS.

[0080] The guide body is hereinafter referred to as the tool longitudinal side surface 18A, and has a longitudinal side surface on which the saw tool 15 is arranged, and a so-called tool-free longitudinal side surface 18B that extends parallel to the longitudinal side surface 18A and also extends between the front end surface and the rear end surface 18C, 18D of the guide body 18.

[0081] The saw unit 11 is arranged on the upper surface 19A opposite to the guide surface 19 of the guide device 17 or the guide body 18. The guide body 18 is, for example, formed by a guide plate or is plate-shaped. While the guide surface 19 is substantially planar except for the receiving contour arranged on this guide surface, in particular, for example, the receiving part 220 and / or the guide contour 216, the upper surface 19A can support functional components and / or be reinforced by a rib structure. In particular, the upper surface 19A can be gripped and / or operated in the region of the handgrip part 18F, especially near the front end face 18C, in order for the operator to guide the hand-held saw 10, for example, to urge the front part of the guide body 18 in the direction of the work W or the guide rail 200 in a force direction perpendicular to the guide surface 19. The handgrip part 18F can be, for example, planar or can include a plane. Advantageously, the handgrip part 18F has a grip recess. However, the handgrip part 18F can also be provided with a grip element 218, such as a rod-shaped or toggle-shaped handgrip.

[0082] The saw unit 11 is biased as a whole in the direction of the upper depth adjustment position OT using the saw unit spring assembly 20. The saw unit spring assembly 20 includes, for example, a coil spring 20A. The coil spring 20A or the spring assembly 20 is supported on the upper surface 19A of the guide device 17 on the one hand and on the lower surface of the saw unit housing 13 on the other hand.

[0083] Along with the depth adjustability about the depth adjustment axis TS, the saw unit 11 can be pivoted about the bevel cutting axis G.

[0084] The hand-held saw 10 has a support 40. The support 40 includes a protective housing 29. The saw unit 11 is held by the support 40.

[0085] The support 40 and / or the protective housing 29 are pivotable about an inclined cutting axis G extending parallel to the longitudinal axis L of the guide device 17, i.e., are supported on the guide device 17 by means of the front inclined cutting bearing 21 and the rear inclined cutting bearing 23 in the working direction AR of the inclined cutting bearing assembly 21A. The inclined cutting bearings 21, 22 are arranged close to or directly on the front end face and the rear end face 18C, 18D of the guide body 18, i.e., form so to speak the foremost component and the rearmost component of the hand saw 10 in the working direction AR.

[0086] The inclined cutting bearings 21, 22 each comprise a bearing base 23, preferably in the form of a plate, protruding upward from the upper surface 19A of the device 10, on which a bearing body 24, likewise preferably formed as a plate, is pivotably supported about the inclined cutting axis G.

[0087] The inclined cutting bearings 21, 22 can be fixed in a plurality of pivot positions relative to the inclined cutting axis G using fixing means 25. The fixing means 25 comprises, for example, a clamping screw 25A that can bias the bearing base 23 and the bearing body 24 towards each other into a clamping position, thereby holding the bearing base and the bearing body in a force-locking and / or friction-locking and / or form-locking manner with each other, for example using teeth meshing with each other, and fixing the support 40 to the guide device 17 in an adjusted angular position relative to the inclined cutting axis G.

[0088] Instead of the concept of the support 40 in which the saw unit 11 and the grooving unit 31 are arranged to be rotatable simultaneously about the bevel cutting axis G using the bevel cutting bearing assembly 21A, a concept is also possible in which the grooving unit 31 can pivot about the bevel cutting axis G independently of the saw unit 11. For this purpose, for example, the bevel cutting bearing 22A exists between the grooving unit 31A, which corresponds to the grooving unit 31 itself, and the saw unit 11 as in the embodiment of the hand-held sawing machine 10A according to FIG. 5. Naturally, like the bevel cutting bearings 21, 22, this bevel cutting bearing 22A can also be fixed by the fixing means 25, for example by a clamping screw, whereby the relative position of the saw unit 11 and the grooving unit 31 can be fixed with respect to the bevel cutting axis G.

[0089] However, in the embodiment according to FIG. 5, it can also be contemplated that the saw unit 11 can pivot about the bevel cutting axis G, while the grooving unit 31A is arranged stationary with respect to the guide device 17 and with respect to the bevel cutting axis G. Also in this case, a bevel cutting bearing 22A is advantageously provided between the grooving unit 31 and the saw unit 11.

[0090] The support 40 comprises a protective housing 29 having a saw tool accommodation space 48 for accommodating the saw tool 15. The saw tool 15 is accommodated so as to be pivotable about the depth adjustment axis TS so that it can perform a pivoting movement within the saw tool accommodation space 48. The saw tool does not protrude in front of the saw tool accommodation space 48 in the upper depth adjustment position OT, but protrudes maximally in front of the protective housing 29 and the guide surface 19 in the lower depth adjustment position, for example in the lowest depth adjustment position UT.

[0091] The sawing tool housing 14 is rotationally driven in a single rotation direction about the tool rotation axis DS by the sawing drive motor 12 such that the saw tool 15 cuts into the workpiece W from its lower surface WU and generates a saw cut SAE. The saw tool 15 is a saw blade, and its teeth are inclined and driven in the rotation direction with respect to the guide surface 19, whereby the teeth can cause the formation of cracks when exiting from the workpiece upper surface WO. To prevent this problem, the hand-held sawing machine 10 has a grooving device module 30.

[0092] The grooving device module 30 includes a grooving unit 31 disposed in front of the saw unit 11 in the working direction AR. Similar to the saw unit 11, the grooving unit 31 is disposed on the support 40. The grooving device drive motor 32 drives the grooving device tool housing 34 about the tool rotation axis DV, but drives it in a rotation direction opposite to the rotation direction of the tool rotation axis DS. The grooving device drive motor 32 forms the grooving device drive 32A.

[0093] The grooving tool 35, for example a grooving device saw blade, can be detachably attached to the grooving device tool housing 34, particularly by a holding element 34A, particularly a holding screw. The grooving tool 35 is driven in a single rotation direction, and its teeth cut into the workpiece W from the workpiece upper surface WO and generate grooves RI that are aligned in a straight line with the saw cut produced in the workpiece W by the saw tool 15. The grooves are somewhat wider than the subsequent saw cuts, whereby the saw tool 15 does not contact the longitudinal edges of the grooves, and thus cracks are not formed or are formed less frequently on the workpiece upper surface WO, and peeling of chips or the like does not occur or occurs less frequently.

[0094] The embossing unit housing 33, in which important components of the embossing unit 31 are protected and accommodated, is arranged on the support 40. Accordingly, the embossing unit housing 33 is stationary with respect to both the support 40 and the protection housing 29, whereas the movable components of the embossing unit 31, in particular the embossing device drive motor 32, the transmission device between the embossing device drive motor 32 and the embossing device tool accommodation 34, etc., are movably accommodated in the internal space of the embossing unit housing 33. It is advantageous for the embossing device drive motor 32 to be accommodated in a motor housing 33A separate from the embossing unit housing 33. The motor housing 33A is movable relative to the embossing unit housing 33.

[0095] The embossing unit 31 comprises an embossing device support 80 which is supported on the support 40 about a depth adjustment axis TV by an embossing device depth adjustment bearing 36. The embossing device tool accommodation 34 is likewise accommodated in the internal space of the protection housing 29, i.e. in the embossing tool accommodation space 49 of the protection housing.

[0096] The embossing device support 80 is, for example, in the form of a block or a cuboid. The embossing device support 80, for example, has an elongate shape. The longitudinal axis of the embossing device support 80 or of the entire embossing device support 80 is inclined at a shallow angle with respect to the guide surface 19, for example, depending on the respective swivel position with respect to the depth adjustment axis TV, or is parallel to the guide surface 19 at several angular positions with respect to the depth adjustment axis TV.

[0097] The ribbing device support 80 includes a bearing portion 81 supported by a ribbing device depth adjustment bearing 36 about a depth adjustment shaft TV at opposite longitudinal end regions, and a motor portion 82 having a motor housing portion 83 in which a ribbing device drive motor 32 is held. A transmission 84 such as a stepped transmission or the like can be disposed between the ribbing device drive motor 32 and the ribbing device tool housing portion 34. For example, based on the transmission 84, it is possible for the tool rotation shaft DV and the motor rotation shaft DM of the ribbing device drive motor 32 to have a lateral distance from each other. For example, the motor rotation shaft DM has a greater distance from the guide surface 19 than the tool rotation shaft DV, and thus the motor rotation shaft is located very close to the guide surface 19. Thus, for example, the ribbing device drive motor 32 can have a larger diameter to generate a correspondingly larger torque than in the case of a type in which the motor rotation shaft and the tool rotation shaft DV are aligned in a straight line with each other.

[0098] In order to operate the sawing tool housing portion 14 between the upper depth adjustment position OT and the lower depth adjustment position UT, the entire saw unit 11 has to be pivoted about a depth adjustment shaft TS. For this purpose, the operator can grip, for example, the handgrips 26 and / or 27 arranged on the saw unit housing 13. The handgrip 26 is arranged behind the saw unit 11 in the working direction AR, and the handgrip 27 is arranged on the saw unit 11 in the front region of the saw unit housing 13 in the working direction AR. The two handgrips 26, 27 have an elongated shape. While the handgrip 26 has a longitudinal axis L26 extending substantially parallel to the longitudinal axis L of the guide device 17, the longitudinal axis L27 of the handgrip 27 extends transversely to this longitudinal axis L. That is, the operator can generate a torque about the depth adjustment shaft TS, for example, by pushing the handgrip 27, whereby the sawing tool housing portion 14 pivots about the depth adjustment shaft TS and the saw tool 15 moves in front of the guide surface 19.

[0099] The hand grip 27 simultaneously forms an operating element 27A that enables the operator not only to operate the saw unit 11 or the saw tool housing 14 between depth adjustment positions, but also, in addition to this, to operate the grooving unit 31. The operating element 27A, that is, the operating hand grip 27B, acts on the grooving unit via a linkage device 70 to adjust the grooving unit between an active position AP in which the grooving tool 35 protrudes in front of the guide surface 19 and an inactive position IP in which the grooving tool 35 retracts behind the guide surface 19 or, in any case, does not protrude in front of the guide surface.

[0100] The grooving device support 80, and thus the grooving device tool housing 34, is loaded in the direction of the inactive position IP by a grooving unit spring assembly 39. In contrast, when the saw unit 11 is operated in the direction from the upper depth adjustment position OT to the lower depth adjustment position UT, the linkage device 70 conveys the grooving unit 31 in the opposite direction, that is, to the active position AP. Thus, when the operator adjusts the hand-held saw 10 to the lower depth adjustment position or the saw position, in order to adjust the saw tool 15 and the grooving tool 35 to the working position or saw position in which they cut into the workpiece W, the operator works against two spring assemblies 20, 39 so to speak. The two spring assemblies 20, 39 act in opposite directions, so to speak, towards the inactive position or the safety position, and both of these spring assemblies act in the sense of safety, that is, in the sense of retracting the saw tool 15 and the grooving tool 35 behind the guide surface 19.

[0101] The linkage device 70 comprises an operating body 71 acting on an operated body 72 of the grooving unit 31, provided on the saw unit 11. The operating body 71 is formed as a link guide 73 and comprises a guide link 74 along which a link follower 75 of the grooving unit 31, for example a roller or an idler roller (Tastrolle), is guided, for example rolls. It is advantageous for the operating body 71 and the operated body 72 to be arranged outside the protective housing 29.

[0102] The guide link 74 includes a grooving device activation part 76 and a grooving device holding part 77, and a vertex 76A is arranged therebetween. The grooving device holding part 77 of the guide link 74 or the link track extends within a radius R centered on the depth adjustment axis TS. In contrast, the grooving device activation part 76 extends at an angle with respect to the grooving device holding part 77 such that, in any case, the link follower 75 guided along the holding part 77 operates the grooving unit 31, particularly the grooving device support 80, in the sense that the link follower 75, and thus the grooving tool 35, is operated from the inactive position IP in the direction of the active position AP along the movement track BB.

[0103] The grooving device activation part 76 is formed such that when the sawing tool housing part 14 is adjusted from the upper depth adjustment position OT in the direction of the lower depth adjustment position UT, the grooving tool 35 is adjusted from the inactive position IP to the active position AP ahead of the saw tool 15. The grooving tool projects in front of the guide surface 19 in order to engage the workpiece W at the active position, preferably at the maximum adjustable penetration depth or groove depth Rmax. When the saw tool 15 or the sawing tool housing part 14 or the saw unit 11 takes the depth adjustment position RT at which the saw tool 15 does not yet project in front of the guide surface 19, the groove depth Rmax or the active position AP has already been adjusted or is adjustable. This adjustment of the hand-held saw 10 corresponds to a pure grooving operation or grooving action that is only used for the grooving unit 31 or the grooving tool 35 to groove the workpiece W.

[0104] The operator can manually position the saw unit 11 at the depth adjustment position RT in this pure grain operation or grooving operation without having to balance it. Only the grooving depth stop device 78 is provided. This only grooving depth stop device 78 includes a stopper member 79 movably supported on the saw unit 11, for example, slidably movable. This stopper member is adjustable between a stopper position TA where it hits a mating stopper 79A arranged in the protective housing 29 and a release position TF where the stopper member 79 can move beside the mating stopper 79A. Thereby, the saw unit 11, and thus the saw blade tool housing 14, is operated from the grain depth adjustment position RT further in the direction of the lower adjustment position UT where the saw blade 15 protrudes in front of the guide surface 19 to cut into the workpiece W. For example, the stopper member 79 is supported on the motor housing part 28 or the saw unit housing 13 so as to be displaceable in a direction transverse to the longitudinal axis L.

[0105] The stopper member 79 is preferably arranged near the hand grip 26, particularly in the upper region of the hand grip that is farthest from the guide device 17. Thereby, the operator gripping the hand grip 26 can operate the stopper member 79 between the stopper position TA and the release position TF with the thumb in a slide guide not shown in detail.

[0106] In this upper region of the hand grip 26, or the region farthest from the guide device 17, there is further arranged a main switch operating element 60 for operating a main switch 60A that can switch the sawing drive motor 12 and the grooving device drive motor 32 on and off.

[0107] The hand-held saw 10 can be connected, for example, using a connecting line 67, to an electrical energy supply network, such as a 120V or 230V AC voltage network, for supplying electrical energy to the drive motors 12, 32, and other electrical components of the hand-held saw 10.

[0108] Instead of, or in addition to, supply by the electrical energy supply network, an electrical energy storage device 67D, such as an accumulator, can also be provided, for example, for the energy supply of the saw unit 10 and / or the grooving unit 31.

[0109] A connecting line 68 is provided for supplying power from the saw unit 11 to the grooving unit 31. The connecting line 68 is connected at its longitudinal ends, on the one hand, to the saw unit 11 and, on the other hand, to the grooving unit 31 by means of connecting parts 68A, 68B. An arcuate connecting part 68C or arcuate section extends between the connecting parts 68A, 68B.

[0110] However, it is also possible to supply electrical energy to the grooving unit 31, for example, by means of an electrical energy storage device 68D arranged on or in the grooving unit housing 33.

[0111] The connecting part 68C extends arcuately in the direction of the protective housing 29 starting from the longitudinal ends 68A, 68B, so that there is an intermediate space optimally suitable for operating the components of the grooving unit 31 between the longitudinal ends or 68A, 68B.

[0112] In particular, the grooving device handgrip body 37 is accessible through the intermediate space between the connecting parts 68A, 68B or the internal space of the connecting part 68C, and the operator can apply an operating force in the direction of the guide surface 19 in the region of the grooving unit 31 using the grooving device handgrip body. The grooving device handgrip body 37 has a handgrip surface 37A, and this handgrip surface is provided, in particular, on the upper wall 38 of the grooving unit housing 33. That is, the grooving unit housing 33 forms the grooving device handgrip body 37.

[0113] The handgrip surface 37A is provided with a grip recess 37B and a flat surface 37C. Above the grip recess 37B, a grip projection 37D having an outer peripheral contour adapted to the palm of the operator's hand, for example, extends.

[0114] The housing 33 further has a side wall 38A extending adjacent to the longitudinal side surface 18B of the guide body 18 and a front wall 38B extending parallel to the front end surface 18 of the guide body 18.

[0115] Since the housing 33 of the grooving unit 31 is fixedly arranged on the support 40, the housing is not pivotable about the depth adjustment axis TV, but is non-pivotable with respect to the depth adjustment axis TV. Thus, the operator can be supported on the housing 33, in particular on the upper wall 38 of the housing, to guide the hand-held saw 10 in the working direction AR and apply a force to the hand-held saw 10 in the direction of the guide surface 19 and / or in the working direction AR. For support on the upper surface 19A of the guide body 18, the housing 33 has a support portion 38D.

[0116] It is advantageous that the housing 33 is ergonomically well-designed. For example, the upper wall 38 is inclined obliquely rearward at a small angle with respect to the working direction AR, whereby the operator can apply an operating force to the housing 38, and thus to the hand-held saw 10, forward in the working direction AR. It is advantageous that the upper wall 38 or the housing 33 has grip projections 38C. The grip projections 38C are also suitable for accommodating the grooving device drive motor 32 thereunder. The operator can be supported by the grip projections 38C or can grip the grip projections, for example, with the palm of the hand. Thereby, in particular, an ergonomic operating concept is realized.

[0117] That is, the operator BE schematically shown, for example, grips the hand grip 26 with one hand to guide the hand-held saw 10, and also operates the main switch 60 and the operating element 61A with this hand, and with the other hand, selectively, as shown as the hand position H1 in FIG. 28, grips the hand grip 27 or, as shown as the hand position H2 in FIG. 28, is supported by the grooving device hand grip body 37 or the housing 38.

[0118] An alternative operating concept, or an operating concept contemplated in addition to the hand grip 37, contemplates an additional grooving device hand grip body 337. The hand grip body 337 is, for example, rod-shaped and has a hand grip surface 337A for the operator BE to grip. The hand grip body 337 is attached to the protective housing 29 by a support body 337B and protrudes from the protective housing in the direction of the grooving unit 31.

[0119] The grooving unit 31 is arranged between the hand grip body 337 and the guide body 18, and there is an intermediate space Z between the hand grip body 337 and the upper surface of the housing 33 of the grooving unit 31 on the side opposite to the guide body 18. The operator can grip the hand grip body 337 by passing through this intermediate space.

[0120] The two hand grip bodies 37 and 337 extend transversely, particularly at right angles, to the longitudinal axis L of the guide body 18 along the longitudinal axis L38. The two hand grip bodies 337 and 37 preferably extend to the so-called tool-free longitudinal side surface 18B of the guide body 18. Preferably, the two hand grip bodies 37 and 337 extend from the longitudinal side surface or the short side 18B in the direction of the longitudinal side surface 18A where the tools 15, 35 are arranged, substantially over the entire width of the guide body 18, thereby providing an ergonomic support for the operator to guide the hand-held saw 10.

[0121] Furthermore, the saw unit 11 or the saw tool receiving part 14 can be locked in the upper depth adjustment position OT by a locking device 61. An operating element 61A of the locking device 61, which is formed, for example, as a pressing operating element, is arranged in the upper region of the hand grip 26 or in the region furthest from the guide device 17. By operating the operating element 61A, the engagement with the opposing contour (Widerlagerkontur), for example the rear engaging contour (Hintergreifkontur), of the operating element can be released, whereby the saw unit 11 is unlocked for adjustment from the upper depth adjustment position OT to one of the lower depth adjustment positions UT or the groove depth adjustment position RT.

[0122] The groove depth adjustment position RT and the other lower depth adjustment positions UT can also be adjusted using the sawing depth adjustment device 62 of the hand saw 10. The sawing depth adjustment device 62 comprises a depth stopper guide 63 which extends in an arc around the sawing depth adjustment bearing 16.

[0123] Advantageously, a guide link 74 which extends in an arc around the depth adjustment shaft TS is also arranged alongside the depth stopper guide 63, at least in the region of the groove activation part 76.

[0124] The depth stopper 64 is adjustably supported on the depth stopper guide 63, for example displaceably, at various depth adjustment positions. The depth stopper guide 63 comprises, for example, a guide groove, a guide slot, or the like. The depth stopper 64 can be fixedly positioned with respect to the depth stopper guide 63 by fixing 65, for example locking fixation, clamping fixation, or the like.

[0125] A stopper body 66 is arranged on the movable saw unit 11 around the depth adjustment shaft TS, which stopper body projects in the direction of the depth adjustment stopper 64 and strikes against the depth adjustment stopper at the depth adjustment position adjusted by each depth adjustment stopper.

[0126] The grooving unit 31, particularly its grooving device support 80, is pivotally supported about the bevel cutting axis G on a support 40 that is pivotable about the depth adjustment axis TV of the grooving device by a grooving device depth adjustment bearing 36. The grooving device depth adjustment bearing 36 includes a bearing base 86 attached to the support 40. The bearing base 86 includes a support plate 86A, for example, a flange or a flange body from which a shaft member 86B projects. The support plate 86A is attached to the base wall 29A of the protective housing 29 by a screw 86C, whereby the shaft member 86B projects from the base wall 29A.

[0127] A bearing sleeve 86E is disposed on the outer periphery of the shaft member 86B, and a bearing member 86F is also disposed on the outer periphery of the bearing sleeve. That is, the bearing sleeve 86E engages with the bearing receiving portion of the bearing member 86F, whereby the bearing member 86F is pivotally supported about the depth adjustment axis TV by the bearing sleeve 86E. The bearing member 86F is fixedly connected, for example, to the grooving device support 80 and is accommodated, for example, in the accommodating portion of the grooving device support.

[0128] The bearing sleeve 86E is an option to improve the rotational or pivotability about the depth adjustment axis TV. For this purpose, to adjust the grooving device tool accommodating portion 34 relative to the sawing tool accommodating portion 14, and thus the grooving tool 35 relative to the saw tool 15, so that their axes are aligned, the bearing sleeve 86E improves the longitudinal displaceability of the grooving device support 80, and thus of the grooving unit 31, relative to the lateral adjustment axis QS, whereby the grooves made by the grooving tool 35 are aligned with the saw cuts made by the saw tool 15. It is advantageous if the lateral adjustment axis QS corresponds simultaneously to the depth adjustment axis TV.

[0129] The lateral adjustment device 87 is used to adjust the grooving device tool housing 34 with respect to the lateral adjustment axis QS. The lateral adjustment device 87 includes, for example, an adjustment screw as an adjustment member 87A, and the head of the adjustment screw forms an operating element 87B. The operating element 87B can be provided with a handle on the radially outer side, for example, with a corrugation or other similar feature that facilitates operation by the operator BE. The threaded portion 87C engages with the adjustment housing 86D of the shaft member 86B and is screwed to the adjustment housing. Therefore, by turning the adjustment screw or the adjustment member 87A, the position of the operating element 87B can be adjusted along the lateral adjustment axis QS. That is, the threaded portion 87C is screwed into or out of the adjustment housing 86D as if it were being screwed in or out.

[0130] The operating element 87B projects radially in front of the lateral adjustment axis QS, for example, by a flange, and projects in front of the shaft member 86B, and thereby the bearing sleeve 86E and / or the bearing member 86F can be supported by this projection. Therefore, when the threaded portion 87C is screwed into the adjustment housing 86D, the operating element 87B moves the bearing member 86F along the lateral adjustment axis QS in the direction of the support plate 86A of the bearing base 86, thereby adjusting the grooving device tool housing 34 away from the tool longitudinal side surface 18A of the guide body 18.

[0131] The spring 86H acts in the direction opposite to this adjustment direction. The spring is supported on one side by the support plate 86A and on the other side by the bearing member 86F, and thus acts with a force in the direction of the operating element 87B. The spring 86H engages, for example, with the spring housing 86G of the bearing member 86F formed as a circumferential groove extending around the lateral adjustment axis QS. The bearing member 86F, the bearing sleeve 86E, and the shaft member 86B penetrate through the spring 86H.

[0132] By rotating the operating element 87B about the transverse adjustment axis QS, the position of the grooving device tool receptacle 34, and thus of the grooving tool 35, can be adjusted in mutually opposite directions with respect to the transverse adjustment axis QS, for example by up to 2.5 to 4 mm each from the central position, relative to the longitudinal axis L of the guide body 18 and / or the cutting axis (Schnittachse) producible by the saw tool 15.

[0133] A locking device 88 is used to fix, in particular rotationally fix, the operating element 87B or the adjusting member 87A. The locking device 88 comprises a clip-shaped spring 88A or alternatively 188A with a locking member 88B formed at its free end. The locking springs 88B, 188B engage in a locking engagement with a locking receptacle 88C which is arranged on the radially outer circumference of the operating element 87B with respect to the transverse adjustment axis QS. By rotating the operating element 87B, the locking member 88B exits from the locking receptacle 88C and locks in the next adjacent locking receptacle 88C in the circumferential direction. Thus, the locking device 88 fixes the transverse adjusting device 87 with respect to each adjusted transverse adjustment of the grooving device tool receptacle 34.

[0134] The body to be operated 72 is arranged on the operating body arm 90, i.e. in the free end region of the operating body arm. A rotary bearing 90A for the wheel 90B is arranged there, and this wheel can rotate about the rotation axis D90 using the rotary bearing 90A in the free end region of the operating body arm 90 and is a link follower 75. That is, thereby the wheel 90 can roll on the guide link 74.

[0135] The object arm 90 is supported by a bearing portion 91 so as to be rotatable about a rotation axis corresponding to the depth adjustment axis TV with respect to the indentation device support 80 of the indentation unit 31. As a result, the link follower 75 has different angular positions according to the rotation position of the object arm 90 with respect to the depth adjustment axis TV or the indentation device support 80. Thus, by rotating the object arm 90 with respect to the indentation device support 80 at the active position AP, different penetration depths of the indentation tool 35 into the workpiece W or different distances by which the indentation tool 35 protrudes in front of the guide surface 19 can be adjusted. Therefore, the object arm 90 forms part of the indentation device depth adjustment means 95.

[0136] The operating arm 92 protrudes from the object arm 90 at an angle (winkelig) from the bearing portion 91. An operating surface 92A is provided on the operating arm 92, and a regulator 93 acts on this operating surface. By adjusting the relative position of the regulator 93 with respect to the operating surface 92A, the object arm 90, and thus the link follower 75, can be adjusted to have different operating distances BA with respect to the indentation device tool housing 34. The link follower 75, and thus the object 72 and the indentation device tool housing 34, protrude from the bearing portion 81 of the indentation device support 80 in the form of arms in opposite directions from each other.

[0137] The regulator 93 supports the operating arm 92 against the force of the spring assembly 94. The spring assembly 94 includes a coil spring 94A that is fixed to the indentation device support 80 on one hand and fixed to the object arm 90 on the other hand, and biases it in a certain sense toward the support 90 or the indentation device tool housing 34. In contrast, the regulator 93 acts in the opposite direction, that is, in the sense of adjusting the object arm 90 from the indentation device support 80, and thus in the sense of increasing the operating distance between the object 72 and the indentation device tool housing 34.

[0138] The adjusting body 93 is supported so as to be displaceable along the axis SA with respect to the grooving device support 80. Further, the adjusting body 93 is supported so as to be displaceable along the axis SB in a direction transverse to the axis SA, in this case at right angles and laterally, and this degree of freedom of movement is assigned to the grooving device depth adjustment means 95.

[0139] The adjusting body 93 has a longitudinal end 93A on which an adjusting surface 93B for engaging with the operating surface 92A of the operating arm 92 is arranged. An intermediate portion 93C of the adjusting body 93 extends between the longitudinal end 93A and the operating end 93B, and the adjusting body has an adjusting contour 93D at this central portion.

[0140] The adjusting body 93 is supported so as to be displaceable with respect to the adjusting axis SA in a receiving body 96 designed, for example, as a housing. For example, the receiving body 96 has bearing receiving portions 96A, 96C, and these bearing receiving portions are arranged on the walls of the receiving body 96 or the bearing portions 96B, 96D. The central portion 93C of the adjusting body 93 extends between the bearing receiving portions 96A, 96C, and the adjusting body 93 projects in front of the receiving body 96 on opposite sides of each other, that is, on one side with the adjusting surface 93B engaging with the operating surface 92A of the operating arm 92 and on the other side with an operating end or operating element 93E on which a gripping surface or another adjusting surface similar thereto for operation by an operator is arranged.

[0141] That is, the operator can, for example, pull the operating element 93E in the direction of the adjustment axis SA, whereby the adjusting body 93 is disengaged from the engagement with the operating surface 92A, and thereby the spring assembly 94 can operate the operated body arm 90 from the activated position AK in the direction away from the guide link 74 to the deactivated position DK. In the deactivated position DK, the link follower 75 is not engaged with the guide link 74 and has, for example, a distance F from the guide link 74 (FIG. 7), whereby the traveling connection of the traveling device 70 between the saw unit 11 and the grooving unit 31 is released. Therefore, the saw unit 11 can be adjusted between its depth adjustment positions OT and UT without the grooving unit 11 being adjusted about the depth adjustment axis TV. The grooving tool 35 remains in the retracted state behind the guide surface 19, that is, it is inactive.

[0142] That is, the adjusting body 93 is a component of the deactivating device 97 for deactivating or activating the traveling device 70.

[0143] The adjusting body 93 is loaded at its activated position AK by a spring 96E. The spring 96E is supported, for example, by the adjusting body 93, for example at a step near the central part 93C, and by the wall 96D of the shaft receiver 96.

[0144] On the operating end or the operating element 93E, preferably a non-rotating part 93F fixed relative to the grooving device support 80 is provided, for example, a plane in which the operating end 93F is supported non-rotatably relative to the adjustment axis SA.

[0145] The adjustment contour 93D forms a component of the grooving device depth adjustment means 95. The adjustment contour 93D arranged on the radially outer periphery of the central part 93C of the adjusting body 93 engages with the adjustment receiving part 98, and the position of the adjustment receiving part can be adjusted transversely relative to the adjustment axis SA along the adjustment axis SB and thus using a depth adjustment member 99, for example an adjustment screw. The operator can operate the depth adjustment member 99 using the operating element 99A.

[0146] Alternatively, the adjusting body 93 can be pivotally supported about the adjusting axis SA, and the adjusting contour 93D can be an eccentric contour, whereby by rotating the adjusting body 93 about the adjusting axis SA, the adjusting contour 93D portions that project to various degrees in the radially forward direction of the adjusting axis SA are supported by the adjusting receiving portion 98, whereby the adjusting surface 93B of the adjusting body 93 assumes different positions with respect to the adjusting axis SB.

[0147] The depth adjustment member 99 has, for example, an operating element 99A, for example a head, from which a threaded portion 99B projects, and the threaded portion is rotatably supported by a stationary component, for example a shaft receiver 96, with respect to the knurling device support 80 and is screwed into a body 98A that provides the adjusting receiving portion 98.

[0148] By screwing the depth adjustment member 99, the lateral position of the adjusting receiving portion 98, which is, for example, U-shaped, can be adjusted laterally with respect to the adjusting axis SA, for example along the adjusting axis SB, whereby at the same time, the position of the adjusting surface 93B, and thus the operating surface 92A of the operating arm 92 that abuts against the adjusting surface, is adjusted laterally with respect to the adjusting axis SA.

[0149] In the adjusting receiving portion 98, the adjusting body 93 is accommodated so as to be displaceable along the adjusting axis SA, whereby the knurling device depth adjustment means 95 maintains the adjusted depth adjustment positions respectively even when the deactivating device 97 is operated by displacing the adjusting body 93 along the adjusting axis SA.

[0150] Between the knurling unit housing 33 forming the knurling device handgrip body 37 and the saw unit housing 13, there is an intermediate space 33B with respect to the longitudinal axis L of the guide device 17 and the guide body 18, and in this intermediate space, one or more of the operating elements for the operator of the knurling unit 31 provided for the operator to operate, for example the operating element 93E of the deactivating device 97, the operating element 87B of the lateral adjustment device 97, or the operating element 99A of the knurling device depth adjustment means 95, can be accessed easily.

[0151] The hand-held sawing machine 10 is short with respect to the longitudinal axis L of its guide body 18, i.e., between the end faces 18C, 18D. This is achieved, among other things, by the particularly compact grooving device module 30 or grooving unit 31. Furthermore, it is also advantageous if the depth adjustment axis TV is arranged between the tool receptacles 14 and 34. Thus, the hand-held sawing machine 10 has a very short front region in the working direction AR, so to speak, rather than a head-like structure.

[0152] Arranging the tool receptacles 14, 34, and thus the saw tool 15 and the grooving tool 35, close to or directly on the longitudinal side face 18A of the guide body 18 also contributes to the ease of use of the hand-held sawing machine 10. In particular, this enables a good view of the entry regions of the two tools 15, 35 into the workpiece W. In addition, the bevel cutting axis G extends immediately adjacent to the longitudinal side face 18A, so that the tools 14, 35 can pivot optimally not only around this longitudinal side face 18A but also around the longitudinal narrow face 204 of the guide rails 200, 200A.

[0153] Furthermore, the hand-held sawing machine 10 provides an advantageous suction concept for dust, particles, etc. generated when sawing and grooving the workpiece W.

[0154] The saw tool receptacle space 48 and the grooving tool receptacle space 49 are provided with a sawing dust discharge device 48A and a grooving device dust discharge device 49A. The receptacle spaces 48, 49 extend up to the guide surface 19, where the saw tool 15 projects in front of the guide surface 19 from its respective receptacle space 48 in one of the lower depth adjustment positions UT, and the grooving tool 35 projects in front of the guide surface 19 from its active position AP. The dust discharge devices 48A, 49A are fluid-connected to a dust discharge connection 52 arranged on the hand-held sawing machine 10 behind in the working direction AR, particularly in the upper rear part, on the protective housing 29. The dust discharge connection 52, which is formed, for example, as a connecting pipe piece, can be connected to a suction device SV, such as the suction hose SL of a working suction device, to suck out the dust, particles, or the like generated during the sawing operation of the hand-held sawing machine 10.

[0155] The protective housing 29 has a protective housing part 40A that is stationary with respect to the support 40, and this protective housing part is covered by a protective housing cover 41 that can be advantageously removed from the protective housing part 40A for maintenance purposes. Between the protective housing part 40A and the protective housing cover 41, accommodation spaces 48, 49 for the upper parts of the tools 15, 35 with respect to the guide device 17 are formed. The protective housing part 40A has, for example, a base wall 29A located on the opposite side of the cover wall 42 of the protective housing cover 41.

[0156] There is a cavity 42A between the base wall 29A and the cover wall 42, and this cavity allows the tools 15, 35 to be moved out of the protective housing 29, whereby the tools protrude in front of the guide surface 19. Adjacent to the cavity 42A, an inclined wall portion 42B of the cover wall 42 extends, and this wall portion is inclined such that the lateral distance between the cover wall 42 and the base wall 29A is reduced in the region of the cavity 42A and / or is smaller in the region of the saw tool accommodation space 48 where the sawing tool accommodation part 14, which is far from the guide surface 19, is arranged.

[0157] Side walls 43C, 43 and 44C, 44 that abut and engage with each other on the end face side protrude at an angle from the base wall 29A and the cover wall 42, whereby the side walls 43 - 44 define the accommodation spaces 48, 49.

[0158] The side walls 43C, 43 are, for example, the rear side walls in the working direction AR. The side walls 44C, 44 extend along the upper part of the protective housing 29, or the part farthest from the guide device 17, and along the front part of the protective housing 29 in the working direction AR.

[0159] The protective housing 29 has a projection 45 in which a grooving tool receiving space 49 is provided. The cover wall 42 extends up to the projection 45. There, on the side opposite to the guide device 17, the side wall 46 projects from the cover wall 42 and the side wall 47 projects at an angle forward in the working direction, i.e., in the direction of the end face 18C. These side walls abut, on the end face side, against the stationary protective housing part 40A with respect to the support 40, and thereby, as a whole, also provide a grooving device receiving space 49 that is closed towards the guide surface 19, except for the through-opening for the grooving tool 35.

[0160] In that case, in principle, it would be possible to aspirate the two receiving spaces 48, 49 via the dust discharge connection 52 without further fluid-technical measures. However, in this case, it is not considered that when the grooving tool 35 cuts into the work top WO, the grooving tool projects particles towards the saw tool 15, which would significantly damage the cutting edge of the saw tool 15 in front in the working direction AR. To solve this problem, several measures described below are advantageous.

[0161] To suck out dust, particles, or the like, a dust discharge passage 50 extends in the region of the protective housing 29 on the side opposite to the guide device 17. The dust discharge passage 50 is defined in the cover 41 or the protective housing part 40A by the side walls 44, 44C on the one hand and the intermediate walls 51, 51C located on the opposite side of the side walls on the other hand. The dust discharge passage 50 extends from the region in front in the working direction AR of the saw tool 15 to the dust discharge connection 52 arranged behind in the working direction AR.

[0162] In that case, in principle, the grooving tool receiving space 49 would be able to communicate directly with the dust discharge passage 50. However, at least in the region where the saw tool 15 and the grooving tool 35 face each other directly, that is, in the vicinity of the guide surface 19, it is advantageous for the separation of the saw tool receiving space 48 from the grooving tool receiving space 49 to exist in the form of a partition wall 55. The partition wall 55 preferably has a stationary partition wall part 55C with respect to the protective housing 29, for example, the protective housing part 40A. The partition wall 55, particularly the partition wall part 55C, extends up to the guide surface 19 and thus stands between the saw tool 15 and the grooving tool 35.

[0163] On the side facing the grooving tool 35, the partition wall part 55C or the partition wall 55 preferably has a flow guide surface 55E, for example, an inflow slope or a collision surface 55D, on which the particles generated by the grooving tool 35 collide and are deflected in the direction of the dust discharge passage 50, that is, thereby they do not flow further towards the saw tool 15.

[0164] In the region of the partition wall part 55C away from the guide surface 19, the grooving tool receiving space 49 opens into an outflow opening 52C to the dust discharge passage 50, whereby the particles generated by the grooving tool 35, shown as the particle flow PV by the black arrow in FIG. 18, are mixed with the particle flow PS, shown by the white arrow, of the particles generated by the saw tool 15.

[0165] The aforementioned partition wall 55 between the grooving tool 35 and the saw tool 15 is also advantageous, and an alternative concept that is contemplated is shown in FIG. 21. However, there, the accommodation spaces 48, 49 are completely separated from each other, and the grooving tool accommodation space 49 has a dust discharge connection 52B that is separate from the dust discharge connection 52 for discharging the particles of the grooving unit 31, and another suction hose SL2 can be connected to this separate dust discharge connection. For example, a connection pipe piece for connecting the suction hose SL2 is provided at the dust discharge connection 52B, and this connection pipe piece is also fluid-connected to a suction device SV, for example, in order to generate a particle flow PV that carries away the particles of the grooving unit 31. The particles generated by the saw tool 15 flow to the suction device SV via the dust discharge connection 52 as a particle flow PS separated from the particle flow PV.

[0166] The dust discharge connections 52, 52B are provided with preferably form-fitting contours 52A, such as rotational form-fitting contours, insertion form-fitting contours, etc., for holding the suction hoses SL, SL2 in a form-fitting manner. Furthermore, it is advantageous if the dust discharge connections 52, 52B have rotary bearings 52D, whereby the suction hoses SL, SL2 are rotatably supported on the hand-held saw 10.

[0167] Merely arranging the tool accommodation parts 14, 34, and thus the tools 15, 35, directly on the so-called free longitudinal side 18A of the guide body 17 already provides optimal visibility of these tools. Furthermore, the viewing window 54 in the cover wall 42, particularly in the lower end region of the cover wall close to the guide surface 19, is also advantageous.

[0168] The viewing window 54 is arranged in the region of the cover wall 42 where the grooving tool 35 is located on the opposite side of the saw tool 15. Thereby, the two tools can be seen through the viewing window 54.

[0169] The viewing window 54 can be closed by a fixed transparent wall made of, for example, plastic, whereby the accommodation spaces 48, 49 will be closed by this wall. However, in this case, cover elements 53, in particular window bodies or window cover elements, are provided.

[0170] The cover element 53 has a saw tool part 53A and a grooving tool part 53B. The saw tool part is assigned to the saw tool 15, and the grooving tool part is assigned to the grooving tool 35. In both cases, when the cover element 53 is adjusted to the cover position ABS and the cover element covers the viewing window 54, it is located on the opposite side of the saw tool or the grooving tool.

[0171] The cover element 53 is adjustable between the cover position ABS and an open position OS in which the cover element at least partially opens the viewing window 54, in particular the part of the viewing window facing the guide surface 19, using a bearing 53D, in particular a slide bearing, in the cover wall 42. Advantageously, an operating contour 53C, such as a rib or the like, is provided for gripping the cover element 53. The cover element 53 can be adjusted to the open position OS by sliding it in one direction P1, and can be adjusted to the cover position ABS by sliding it in the direction P2 opposite to this direction.

[0172] The cover element 53 has a partition wall part 56 of the partition wall 55. The partition wall part 56 engages or contacts the stationary partition wall part 55A in a nested and telescopically expandable manner, or such that the partition wall 55 closes, in the cover position ABS and the open position OS. The partition wall part 56 has, for example, a partition wall receiving part 57 with side walls 56A facing each other. The stationary partition wall part 55A can engage in the partition wall receiving part 57, and the partition wall part engages deeper in the partition wall receiving part 57 in the open position OS than when in the cover position ABS.

[0173] Furthermore, the cover wall 42 is provided with cavities 58, 59, through which the tool storage parts 14, 34 can be accessed for tool replacement of the tools 15, 35. Here, it should be mentioned that it is advantageous for the holding elements 14A, 34A to have the same operating contour for the tools that can remove the holding elements 14A, 34A for tool replacement and can be fixed to the tool storage parts 14, 34, for example, a slit for a driver.

[0174] For tool replacement of the grooving tool 35, a blocking device 85 is provided. The blocking device 85 includes a grooving device block member 85A that engages with a block housing part 85B that is non-rotatably connected to the grooving device tool storage part 34 and is arranged, for example, on the output shaft of the transmission device 84 at the blocking position. The block member 85A is axially displaceable along the adjustment shaft S85 in the guide 85C. By pushing the operating contour 85D in the end region of the block member 85A that freely protrudes in front of the guide 85C, the operator can engage the block member 85A with the block housing part 85B, that is, move it to the blocking position where the grooving device tool storage part 34 is non-rotatably blocked. This blocking position can be released, for example, by pulling in the sense of pulling the block member 85A away from the block housing part 85B. It is advantageous to provide a spring 85E schematically shown in the drawing, and this spring biases the block member 85A to the release position where the block member 85A does not engage with the block housing part 85B.

[0175] Alternatively or in addition to this, a motor drive device 85F such as an electromagnet, an electric linear drive, etc., can be provided that can adjust the block member 85A to the blocking position and / or the release position. For example, the drive device 85F can act on the blocking position, while the spring 85E acts on the release position. To switch the drive device 85E, an electric switch 85G that can be operated, for example, by a pressing operation by the operator or the like is provided.

[0176] Safety device 100 is used for safe and easy tool replacement of saw tool 15 and / or grooving tool 35.

[0177] When safety device 100 is adjusted to its safe position SG, switch 60A is cut off so that drive motors 12, 32 cannot be switched on. When adjusted to saw operation position FS, switch 60A is released so that drive motors 12, 32 can be switched on. Thus, for tool replacement, safety device 100 can lock both drive motors 12, 32 against being switched on simultaneously.

[0178] Safety device 100 comprises an operating element 101 pivotally supported on protective housing 29 about pivot axis DB and / or on handgrip 26. When the operating element 101 is pivoted away from the protective housing 29 or the handgrip 26, i.e., when taking the position at the safe position SG shown in FIGS. 31 and 32, the operator can immediately recognize the safe position SG. The operating element 101 comprises a grip portion 102 having side legs, and in the saw operation position FS, a part of the protective housing 29 is received between the side legs. Thus, the operating element 101 is in close contact with the protective housing 29 in the saw operation position FS and does not protrude in front of the protective housing in any case. The operator can grip the operating element 101 with the grip portion 102.

[0179] For the operating element 101, a motor drive device 101A such as an electric motor, which can be pivotally driven or rotationally driven, for example, the operating element 101, and which is schematically shown and can be switched by an electric switch 101B operable by the operator, for example, by a pressing operation, is also possible.

[0180] The grip portion 101 is arranged in the free end region of the operating arm 103 of the operating element 101, and the operating arm is pivotally supported on the protective housing 29 about the pivot axis DB by a bearing portion 104.

[0181] The operating member 101 operates the switch blocking member 105 to cut off the switch 60A. The blocking member 105 has an arm 106 that can be operated, for example, displaceably and / or pivotably, by the operating element 101. A rear engagement contour 107, for example, a hook, is arranged in the free end region of the arm. The rear engagement contour engages rearwardly with the operating element 60 of the switch 60A when the switch blocking member 105 is in the blocking position, whereby the operating element can no longer operate the switch 60A in the direction of the switch-on position.

[0182] Furthermore, it is advantageous if the operating element 101 is formed to release the locking device 61. For this purpose, for example, an operating device 108, for example a cam disk, or the like, is kinematically coupled to the operating element 101 in such a way that it rotates about an axis DB, for example. The operating device acts on an adjusting member 109, which operates the operating element 61A to disengage it from the opposing contour 61B when the operating element 101 is adjusted to the safe position SG. Thus, the saw unit 11 can pivot about the depth adjustment axis TS from the upper depth adjustment position OT to the tool change depth adjustment position WT suitable for tool change of the saw tool 15.

[0183] A locking device 120 is provided to lock the tool change depth adjustment position WT. The locking device 120 has a locking element 121 pivotably supported about a pivot axis S12. The locking element 121 has a locking projection 122 for locking with a locking receptacle 123 fixedly arranged in the protective housing 29, for example, next to the depth stop guide 63. A spring 124 loads the locking element 121 in the direction of a locking position where it can lock with the locking receptacle 123.

[0184] The locking device 120 can be activated and deactivated by the safety device 100. That is, when the operating element 101 is adjusted to the safe position SG, the safety device activates the locking device 120. The operating element 101 is kinematically coupled to the operating device 110, for example in the sense of a rotational movement, to activate and deactivate the locking device 120. The operating device 110 has an operating link 111 on the side facing towards its locking element 121, and the operating link acts on the operating leg 125 of the locking member 121. Specifically, when the operating element 101 is adjusted to the safe position SG, the locking member 121 is released by the spring 124 to lock with the locking receptacle 123, and / or the spring 124 is preloaded. In contrast, when the operating element 101 is adjusted to the sawing operation position FS, the locking member 121 is continuously disengaged from the locking receptacle 123 against the action of the spring 124 and / or the spring 124 does not have sufficient spring tension to lock the locking member 121.

[0185] When the sawing tool receptacle 14 is adjusted to the tool change depth adjustment position WT, the sawing tool receptacle is arranged in the region of the cavity 58. By means of the trailing device 70, the grooving device tool receptacle 34 is also adjusted to the tool change depth adjustment position in which this grooving tool receptacle is arranged within the cavity 59. Thus, the tool receptacles 14, 34 are accessible for tool change of the tools 15, 35.

[0186] Furthermore, the operating element 101 cooperates with or influences the blocking device 130, and the blocking device can block the sawing tool receptacle 14 from rotating about the tool rotation axis DS.

[0187] The block device 130 has a sawing block member 131 that engages with at least one block contour 132 which is non-rotatably connected to the saw tool housing 14 at the block position. For example, some block contours 132 in the form of block notches 133 are arranged on a fan wheel 134 that is rotationally coupled to the saw drive motor 12 and / or the saw tool housing 14. The fan wheel 134 has, for example, fan blades 135. The block notches 133 are arranged on the radially outer periphery of the fan wheel 134.

[0188] The motor drive 101A of the safety device 100 simultaneously forms a drive for adjusting the sawing block member 131 between its blocking position that blocks the saw tool housing 14 and its release position that releases it.

[0189] The sawing block member 131 has a block projection 136 at one longitudinal end thereof, and when the corresponding rotational position of the fan wheel positions the block notch on the opposite side of the block projection, this block projection can engage with one of the block notches 133. The other longitudinal end of the sawing block member 131 is movably accommodated, in particular slidably, in a bearing not visible in the figure and is loaded in the direction of the blocking position by a spring 137. By adjusting the operating element 101 to the safe position SG, the sawing block member 131 is released to be operated by the spring 137, or the spring 137 is preloaded (vorgespannt) by the operating element 101 to operate the sawing block member 131, whereby the block projection 136 is preloaded to engage with one of the block notches 133. Then, when the saw tool housing 14 is rotated slightly, one of the block notches 133 moves to the front position relative to the block projection 136, whereby this block projection engages with the block notch 133 and fixes the saw tool housing 14 against further rotation.

[0190] The switching-on of the grooving device drive motor 32 is electrically blocked and thus prevented by a safety device 100 adjusted to a safe position SG. Thus, the operator can safely block the grooving device tool receptacle 34 by manually operating the blocking device 85 and replace the grooving tool 35.

[0191] Instead of or in addition to this manual operation, a mechanical interconnection (not shown in the drawings) can also be provided between the grooving device blocking member 85A and the sawing block member 131, such that when the sawing block member 131 is adjusted to the blocking position, the grooving device blocking member 85A is simultaneously adjusted to the blocking position.

[0192] For example, if the mechanical connection between the blocking members 85A and 131 is impossible or difficult because the transmission device creating the connection between the blocking members 85A and 131 is mechanically complex or requires a large amount of space, an electrical connection is also possible. For example, a sensor 101C is provided to detect the position of the safety device 100, for example the position of the operating element 101. The sensor 101C detects, for example, whether the safety device 100 is in the safe position SG or in the saw operating position FS. In the saw operating position FS, the sensor 101C controls, for example, the drive motor.

[0193] The interconnection device 70 is schematically shown in FIG. 33. It can be seen that the operator can operate the grooving unit 31 from the inactive position in the direction of the active position by swiveling the saw unit 11, and the force transmission is carried out by the interconnection device 70.

[0194] The grooving device drive 32B of the grooving unit 31 is schematically shown. For example, a belt 32C or another force transmission element of the like is kinematically coupled to the sawing drive motor 32 and is driven by this sawing drive motor to drive the grooving device tool housing 34. To apply tension to the belt, for example, a tension roller (Spannrolle) with a spring, in particular, and / or a length compensation device, etc., which are not shown in the drawing, can be provided.

[0195] In the embodiment of the hand-held saw 10C according to FIG. 34, a trailing device 70C is provided. When the saw unit 11 is operated from the upper depth adjustment position shown in the drawing in the direction of the lower depth adjustment position where the saw tool 15 protrudes in front of the guide surface 19, the grooving unit 31 is trailed by this trailing device. However, the grooving unit 31C is loaded by a spring assembly 39C in the direction of the active position where the grooving tool 35 protrudes in front of the guide surface 19 and is not loaded in the direction of the non-active position as in the hand-held saw 10.

[0196] As the operating body 71C, a trailing surface or a stopper surface on which the operated body 72C of the grooving unit 31C is supported is provided on the saw unit 11. The operated body 72C is arranged, for example, on an operating arm that protrudes from the grooving device depth adjustment bearing 36 starting from the grooving unit 31C. When the saw unit 11 is adjusted in the direction of the lower depth adjustment position of the sawing tool housing 34, the operating body 71C releases the operated body 72C so to speak, that is, the spring assembly 39C can adjust the grooving unit 31C from the non-active position in the direction of the active position.

[0197] In the active position, the grooving unit 31C preferably strikes against the grooving device depth stopper 95D of the guide device 17 with the stopper projection 95C. For example, when the depth stopper is formed by the head of a screw that can be screwed into the guide device 17, the depth stopper 95D can be adjusted to adjust different depth adjustment positions or active positions. The stopper projection 95C is provided, for example, in the free end region of the arm of the grooving unit 31C that protrudes from the depth adjustment bearing 36.

[0198] In the embodiment of the hand-held sawing machine 10D, no trailing device is provided between the saw unit 11 and the grooving unit 31D. The grooving unit 31D is supported by the guide device 17 so as to be freely pivotable about the depth adjustment axis TV by the above-described depth adjustment bearing 36 and independently of the saw unit 11, but it needs to be manually operated by the operator. For this purpose, for example, the grooving device handgrip body 237D is provided in the form of an operating knob that protrudes upward from the grooving unit 31D with respect to the guide device 17. Further, preferably, a stopper projection 95C for striking against the depth stopper 95D is provided on the grooving unit 31D.

[0199] For switching the drive motor 32 of the grooving unit 31D on and / or off, for example, a switch 60D is arranged on the handgrip body 237D. That is, the handgrip body 237D forms an operating body 71D for the grooving unit 31D.

[0200] For example, it is also possible to perform rotational drive in order to adjust the grooving tool 35 between the active position and the non-active position and / or to adjust its penetration depth into the workpiece. For example, an adjustment motor 72D can be arranged at the grooving device depth adjustment bearing 36, and the grooving tool 35 can be adjusted between various depth adjustment positions by rotational drive about the depth adjustment axis TV.

[0201] However, a drive concept with a motor for adjusting the grooving unit between its non-active position and its active position is also advantageously problem-free, as will become apparent in the embodiment of the hand-held saw 10E. The saw unit 11 of the hand-held saw can, as described above, be pivoted by the operator manually between an upper depth adjustment position and one of the lower depth adjustment positions by means of the depth adjustment bearing 16, while on the other hand an adjustment motor 72E is provided for adjusting the grooving unit 31E. A sensor for detecting each rotational position or relative position of the saw unit 11 with respect to the guide device 17, i.e., for example, each adjusted depth adjustment position, is used as the operating body 71E of the linkage device 70E. The sensor or operating body 71E is connected to and controls the adjustment motor 72E of the grooving unit 31E, i.e., the operated body, using a control connection, for example, a wireless or wired control connection not shown in the figure. Needless to say, the adjustment motor 72E can also be controlled individually, i.e., disconnected from the operating body or sensor 71E. For example, an electrical switching element 99E can be provided so that the operator can control the adjustment motor 72E individually, for example, to groove the workpiece without making a saw cut or to adjust the grooving unit 31E to the non-active position to make only a saw cut with the saw tool 15. Furthermore, a deactivation device 97E, for example, an electrical switch for operably moving the adjustment motor 72E in the direction of the non-active position or upper position of the grooving device tool receptacle 34E and / or for blocking the power supply to the adjustment motor 72E in the direction of the active position of the grooving device tool receptacle 34E, is advantageous.

[0202] The deactivation device 97E and / or the switching element 99E could be provided without problems to control the rotationally driven adjustment motor 72D.

[0203] Unlike the above-described grooving unit, the grooving unit 31E is not pivotally supported with respect to the guide device 17, but is slidably supported along the depth adjustment axis TVS by a slide bearing 36E. The spring 39E biases, for example, the grooving device support 80E on which the grooving device drive motor 32E is held, in the direction of the inactive position in which the grooving tool 35E driven by the grooving device drive motor 32E retracts behind the guide surface 19. The adjustment motor 72E acts in a direction opposite to that of the spring 39E, that is, operates the grooving tool 35E in the direction of the active position, whereby the grooving tool 35E can project in front of the guide surface 19 and penetrate into the workpiece. However, using the adjustment motor 72E, depth adjustment, that is, adjustment of the penetration depth of the grooving tool 35E into the workpiece W is also adjustable.

[0204] The grooving unit 31F of the hand-held sawing machine 10F is also linearly adjustable, that is, along the depth adjustment axis TVS using a depth adjustment bearing, in particular a slide bearing 36F. The slide bearing 36F comprises, for example, a guide rod or a support column on which the grooving device support 80F is displaceably supported with respect to the depth adjustment axis TVS. The grooving device support 80F is biased by a spring assembly 39F into an inactive position in which the grooving tool 35F does not project in front of the guide surface 19.

[0205] The grooving tool 35F can itself be provided with a saw blade or a grooving blade, but, like the grooving tool 35E, is preferably a milling tool or a milling head. The grooving tool 35F is driven by a grooving device drive motor 32F.

[0206] The grooving unit 31F is also adjustable between its inactive position and one or more active positions, independently of the saw unit 11.

[0207] However, unlike the hand-held sawing machine 10E, the grooving unit 31F can be adjusted manually, rather than by a motor, between the active position and the non-active position. The spring assembly 39F applies a load to the grooving device support 80F in the non-active position. In the direction of the active position, as the operating body 71F, a handlebar or other operating element pivotally supported on the saw unit 11 is provided, and this operating element manually operates a force transmission element 90F, such as a Bowden cable, wire rope, pneumatic pipe or hydraulic pipe, or the like. The operating body acts on an operated body 72F, which is, for example, a fluid cylinder, an adjustment drive device, or the like, to adjust the grooving tool 35 in the direction of the active position against the force of the spring assembly 39F. Advantageously, this movement is limited by a depth stopper 95F fixedly arranged in the guide device 17.

[0208] The grooving unit 31X substantially corresponds to the grooving unit 31 but has an alternative depth adjustment means 195. While the depth adjustment means 95 provides depth adjustment by an adjusting body 93 that supports the operating arm 92, the depth adjustment member 199 is arranged on an operating arm projection 92B protruding from an operated body arm 90, such as the operating arm 92, and is supported by the adjusting body 193.

[0209] The depth adjustment member 199 has an operating element 199A that is connected to or has a threaded portion 199B. The threaded portion 199B is screwed into a threaded receiving portion 92C of the operating arm projection 92B. The threaded portion 199B is arranged on a threaded body 199C, and this threaded body is screwed into the threaded receiving portion 92C.

[0210] The threaded body 199C is connected to the operating element 199A on the one hand and accommodates, for example, a pin-shaped or elongated support body 199D on the other hand. The free end region of the support body 199D provides an operating surface 192A that can operate the operated body arm 90.

[0211] In a structure composed of two parts, namely the support body 199D and the threaded body 199C, the support body 199D can be positioned relative to the threaded body 199C and fixed there, for example, adhesively, in order to calibrate the first depth adjustment position or the initial depth adjustment position that the grooving unit 31X should take. Thereby, for example, manufacturing tolerances can be compensated. However, it is possible without problems for the depth adjustment member 199 to be integral, or for parts of the depth adjustment member, such as the support body 199D and the threaded body 199C, to consist of a single part.

[0212] A spring 199E is preferably arranged between the operating element 199A, which is so to speak the head of the depth adjustment member 199, or the threaded body 199C, and the operating arm protrusion 92B. This spring is provided for, for example, locking and / or frictionally coupling to fix, for example, clamp and fix, the depth adjustment member 199 at each adjusted depth adjustment position. Thereby, for example, unintentional adjustment movements caused particularly by vibrations or the like can be prevented or reduced.

[0213] The grooving device depth adjustment means 195 cooperates with the deactivation device 197 and the adjusting body 193. The adjusting body 193 protrudes laterally from the grooving device support 80, similar to the adjusting body 93. However, different from the adjusting body 93, the adjusting body 193 is pivotably supported, that is, pivotable about a pivot axis or adjustment axis SB. The adjustment axis SB corresponds to the longitudinal axis or the longitudinal direction extension of the adjusting body 193.

[0214] The longitudinal end or bearing end 193A of the adjusting body 193, formed, for example, in the form of a bearing pin, is pivotably supported in a bearing housing 196 fixedly arranged on the support 80, that is, pivotable about the adjustment axis SB. The bearing housing 196A is formed, for example, in the form of a receiving sleeve or a receiving tube. The bearing housing 196A is provided, for example, on a bearing body 196 that protrudes laterally, particularly at a right angle, from the grooving device support 80 with respect to its longitudinal extension.

[0215] The central part 193C of the adjusting body 193 has an adjusting contour 193D on which the depth adjusting member 199 is supported by the operating surface 192A. The adjusting contour 193D is arranged between the longitudinal end or bearing end 193A and the operating element 193E, for example a handgrip that protrudes laterally from the adjusting body 93 with respect to the adjusting shaft SB and can be easily gripped by the operator.

[0216] The adjusting contour 193D has adjusting parts 193G and 193H, which are formed by the peripheral shape of the adjusting contour 193D that is eccentric with respect to the pivot axis or adjusting shaft SB. The adjusting part 193G is assigned to the activation position AK of the deactivation device 197 and protrudes in front of the adjusting shaft SB more than the adjusting part 193H assigned to the deactivation position DK. Therefore, the adjusting part 193H does not deflect the depth adjusting member 199 much from the adjusting shaft SB, so that the operated body arm 90 is farther away from the operating body 71 and the guide link 74 than when in the activation position AK due to the spring force of the spring assembly 94. That is, in that case, the adjusting part 193G that protrudes greatly in front of the adjusting shaft SB acts at the position where the operated body 72, which greatly deflects or operates the operated body arm 90 in the direction of the operating body 71, is in contact with the operating body 71.

[0217] The spring 196E is supported on the one hand by the step of the adjusting body 193 provided with the adjusting contour 193D on the outer periphery and on the other hand by the step on the outer periphery of the shaft receiver 196, and thus loads the adjusting body in the sense of frictional engagement or locking at the adjusted deactivation position DK or activation position AK respectively. For example, the spring 196E presses the radially protruding part or flange protruding part 193B with the adjusting contour 193D arranged on the outer periphery against the support surface 196B. The support surface 196B is provided, for example, on the motor housing 33A.

[0218] When the sawing drive motor 12 is switched on and off, the grooving device drive motor 32 is periodically switched on and off by the switch 60A. However, at the deactivation position DK of the deactivation device 197, the grooving device drive motor 32 is not required. Even when the grooving unit 31 or 31X is in its deactivation position DK and / or its inactive position IP, the fact that power is supplied to the grooving device drive motor 32 itself is not a problem. In that case, the grooving tool 35 will be driven, but it will not protrude in front of the guide surface 19 in the sense of biting into the workpiece W and / or it will be housed in the protective housing 29. However, in this situation, it is advantageous for the grooving device drive motor 32 to be switchable off, for example by means of the switches 32S and / or 32S2. The switch 32S or 32S2 is, for example, a component of a control device 32T arranged in the motor housing 33A or is assigned to this control device.

[0219] The motor housing 33A has, for example, a receiving part or lower part 33B and a cover 33C, which in the closed state encapsulate or surround the grooving device drive motor 32 and the control device 32T, whereby their electrical components are protected from the influence of the environment.

[0220] The switch 32S or 32S2 comprises, or consists of, for example, a magnetic or other non-contact operating sensor. The switch 32S is arranged outside the motor housing 33A, for example on a support 32H, for example on a circuit board, and communicates with the control device 32T. The switch 32S2, which is provided instead of, or in addition to, the switch 32S, is housed in a protected state in the interior space of the motor housing 33A and is, for example, a component of the control device 32T. To operate the switch 32S or 32S2, an operating element 32G, for example a magnetic sensor, or the like, is provided. The operating element 32G is operable by the adjusting body 193. For example, the operating element 32G is housed in a holding and receiving part, for example a pocket, of the adjusting body 193. The operating element 32G could also be arranged without problems on the adjusting body 93. In any case, the operating element 32G is, for example, axially displaceable along the adjusting shaft SA and / or rotatable about the adjusting shaft SA or SB, whereby the relative position to the sensor or the switch 32S or 32S2 changes. The switch 32S communicates with the control device 32T and transmits the respective positions of the operating element 32G to the control device. Depending on the respective position of the operating element 32G relative to the switch 32S, the switch or the control device 32T switches the grooving device drive motor 32 on or off, i.e., on at the activation position AK of the adjusting body 93 or 193 and off at the deactivation position DK.

[0221] The grooving tool 35 will be described below in embodiments 35A, 35B, 35C, 35D. As long as the aforementioned grooving tools 35 - 35D have the same components, the following applies generally to the grooving tool 35 as well.

[0222] For example, each grooving tool 35 has a blade body 310 having flat surfaces 311, 312 facing each other. In the case of grooving tools 35A, 35B, 34C, 35D, the grooving tooth arrays 300A, 300B, 300C, 300D are arranged on the radially outer periphery of the blade body 310. The grooving tooth arrays 300A, 300B, 300C, 300D have different numbers of grooving teeth 301 to 304. For example, the grooving tooth array 300A has grooving teeth 301, 302, 303, 304, that is, a total of 4 grooving teeth, while the grooving tooth array 300B has only 3 grooving teeth 301, 302, 303, the grooving tooth array 300C has only 1 grooving tooth 301, and further the grooving tooth array 300D has only 2 grooving teeth 301, 302.

[0223] The blade body 310 has, at its center ZV, a mechanical housing portion 315 for detachably attaching to the grooving device tool housing portion 34 of the sawing machine 10.

[0224] When the grooving tool 35 is attached to the sawing machine 10, at the same time, the central axis or rotation axis DV of the grooving tool 35, which is the rotation axis of the grooving device tool housing portion 34, penetrates the center ZV.

[0225] The grooving teeth 301 to 304 project in front of the radially outer periphery 313 of the blade body 310 or the grooving tool 35 at the main cutting edge tip 350, whereby the grooving teeth can be used to cut into the work surface WO of the work W there.

[0226] That is, the grooving teeth 301 to 304 project in front of the radially outer peripheral surface 314 of the blade body 310. The peripheral surface 314 has a substantially cylindrical outer sleeve shape.

[0227] There is a relatively large angular distance between the texture teeth 301 to 304. For example, in the texture insertion tool 35, an angular distance WA of about 90° or exactly 90° is provided between the texture teeth 301 to 304. In the case of the texture insertion tool 35B, for example, an angular distance WB of 120° is provided between the texture teeth 301 to 303. The texture insertion tool 35C has only a single texture tooth 301, resulting in an angular distance of 360°. In the case of the texture tooth arrangement 300D where there are two texture teeth 301, 302, these are preferably equidistant from each other and have an angular distance WD of 180°.

[0228] Here, it should be mentioned that, of course, different angular distances can also be provided between the texture teeth. For the sake of clarity, for example, in the texture insertion tool 35A, the texture tooth 303 is shown by a dashed line. This texture tooth may not exist in some cases.

[0229] A chip space 316 is provided in front of each of the texture teeth 301 to 304. The chip space 316 is formed by a recess 317 in the blade body 310. The recess is recessed radially inward from the radially outer periphery 313 and is particularly formed in the form of a substantially U-shaped or V-shaped depression. Each recess 317 or each chip space 316 has a bottom 318, and from this bottom, side surfaces 319, 320 extend in the direction of the radially outer periphery 313. The side surfaces 319, 320 are substantially straight. The side surface 319 faces the respective main cutting edges 350 of the texture teeth 301 to 304, while the side surface 320 of the chip space 316 is located on the so-called opposite side of this main cutting edge 350. An arcuate transition portion 321 extends between the side surface 320 and the radially outer periphery 313 or the circumferential surface 314.

[0230] Apart from the chip space 316, the radially outer periphery 313 extends circularly or annularly around the central axis, that is, the rotation axis DV, of the blade body 310 or the texture insertion tool 35. For example, this arcuate shape extends over an angle of at least 30°, preferably at least 40° or more, with respect to the rotation axis DV even when four texture teeth 301 to 304 are provided as in the case of the texture insertion tool 35A.

[0231] The rib teeth 301 to 304 each have a cutting body 330. Each cutting body 330 is attached by an attachment portion 331 to the blade body 310, particularly near the side surface or side surfaces 319. For example, the side surface 319 has a stepped portion where each cutting body 332 is installed. For example, the attachment portion 331 is received in this kind of stepped portion. The attachment portion 331 of the cutting body 332 is supported on the back side of the blade body 310.

[0232] In front of the blade body 310, a portion 332 of the cutting body 330 projects radially outward with respect to the rotation axis DV. The side portion 333 of the cutting body 330 projects in front of the flat surfaces 311, 312. Thus, the portions 332, 333 are mechanically loaded during the working operation of the grooving tool 35, i.e., when the grooving tool cuts into the workpiece W, but are optimally supported by the attachment portion 331. Furthermore, it is advantageous if the cutting body 330 has a support projection 334 that projects radially inward and is also supported by the blade body 310.

[0233] The rib teeth 301 to 304, and thus the cutting bodies 332, have, for example, a main cutting edge tip 350 that extends parallel to the rotation axis DV or the central axis of the grooving tool 35.

[0234] A secondary cutting edge tip 351 extends laterally with respect to the main cutting edge tip 350. The secondary cutting edge tip 351 is, for example, at an angle greater than a right angle, i.e., in an angle range of, for example, 90 to 110°, with respect to the main cutting edge tip 350 located between the secondary cutting edge tips 351. For example, the main cutting edge tip 350 and each adjacent secondary cutting edge tip 351 form an angle 354 of at least 90° and at most 110°. In an embodiment, the angular dimension WI of the angle 354 is, for example, about 7°.

[0235] The secondary cutting edge 351 extends radially inward with respect to the rotation axis DV, and the radially inner end region 355 has a radial distance RD with respect to the main cutting edge 350. The secondary cutting edge 351 that extends slightly or flatly obliquely with respect to the flat surfaces 311, 312 enables the creation of the streaks RI at different depths, and when the grooving tool 35 deeply penetrates or enters the workpiece surface WO, the width of each streak RI increases. That is, the maximum depth Rmax of the streak RI is basically determined by the radial distance RD.

[0236] However, in this case, that is, for example, when the side surface portion 352 of the cutting body 332 or the streak teeth 301 to 304 are also formed as cutting edges in the same way, the streak RI could be created deeper. The side surface portion 352 extends, for example, parallel to the central plane of the blade body 310 or perpendicular to the rotation axis DV.

[0237] The streak RI created by the grooving tool 35 has a streak bottom RB, and from this streak bottom, the lateral surface RF extends to the workpiece surface WO. The width of the bottom RB is determined by the lateral distance Q1 of the secondary cutting edge 351 in the region of the main cutting edge 350 or the length of the main cutting edge 350.

[0238] The stepped portion 353 is formed between the radially inner end of the side surface portion 352 and the respective flat surfaces 311, 312.

[0239] The saw tool 15 includes, for example, a saw blade 15A. The blade body 370 of the saw blade 15A has flat surfaces 371, 372 facing each other, and has a saw tooth arrangement 376 including saw teeth 377 on the radial outer periphery 373 with respect to the rotation axis DS around which the saw blade 15A rotates during the sawing operation.

[0240] The number of saw teeth 377 is larger than the number of streak teeth 301 to 304. Further, the saw teeth 377 have a smaller angular distance with respect to the rotation axis DS by which the saw blade 15A is driven than the streak teeth 301 to 304 with respect to the rotation axis DV.

[0241] The saw tool 15 is intended and formed to saw or cut into the workpiece W from the lower surface WU of the workpiece. The saw blade 15A has, at its center ZS, a machine receiving portion 375 that is penetrated by the rotation axis DS or the central axis of the saw blade 15A.

[0242] The radial outer periphery 373 has, for example, an outer diameter D73 that is three to four times larger than the outer diameter D13 of the outer periphery 313 of the grooving tool 35.

[0243] The inner diameter D75 of the machine receiving portion 375 of the saw blade 15A is larger than the inner diameter D15 of the machine receiving portion 315 of the grooving tool 35.

[0244] The maximum lateral width of the grain RI in the region of the workpiece surface can be adjusted by the grooving tool 35 entering the workpiece surface WO at different depths. The maximum width of the grain RI, i.e., the maximum distance between the lateral grain surfaces RF, is determined by the lateral distance Q2 in which the secondary cutting edges 351 have the maximum radial distance RD from each other. That is, the grain RI can be at most as wide as the lateral distance Q2.

[0245] Such an adaptation is particularly advantageous because it allows the grooving tool 35 to be associated with different saw tools or saw blades, and in any case, saw tools with different cutting widths (Schneidbreite) or cut widths (Schnittbreite) (with respect to their respective lengths parallel to the rotation axis DS) can be used. The above adaptation is also advantageous in relation to the manufacturing tolerances or dimensional tolerances of the saw tool or saw blade, and / or when the depth to which the saw blade penetrates into the workpiece or something similar is different.

[0246] The grooving tool 35A can be adjusted with respect to its penetration depth into the workpiece W. The grooving device tool housing 34 is a component of the grooving unit 31 having the grooving device drive 23A. The grooving device drive 32A includes a grooving device drive motor 32 that drives the grooving device tool housing 34 in which the grooving tool 35 is arranged, either directly or via a transmission not shown in the schematic diagram. For example, a mounting flange penetrates the machine housing 315. Between the drive motor 32 and the tool housing 34, for example, a stepped transmission (Stufengetriebe) can be provided, whereby the rotational axis of the tool housing 34 and the motor rotational axis of the drive motor 32 are not aligned in a straight line, and in particular, the motor rotational axis of the drive motor 32 has a greater distance from the drive device rotational axis DV than the area of the grooving tool 35 intended to penetrate into the workpiece W.

[0247] The sawing tool housing 14 in which the machine housing 375 is arranged can be driven by the sawing drive motor 12, for example, directly or via a transmission not shown in the drawing.

[0248] Similar to the saw unit 11, the grooving unit 31 is movably arranged on the guide device 17, for example, on the guide body 18 of the guide device 17. The guide surface 19 of the guide body is intended to guide along the workpiece surface WO. The sawing tool housing 14 and the grooving device tool housing 34 are depth-adjustable with respect to the guide surface 19, whereby they protrude more or less in front of the guide surface 19. Thereby, the penetration depth of the grooving tool 35 and the saw tool 15 into the workpiece W can be adjusted.

[0249] In that case, the saw tool 15 is adjusted or adjustable such that its main cutting edge tip 380 cuts into the workpiece W from the workpiece bottom surface WU. In addition, secondary cutting edge tips 381 extend at an angle to this main cutting edge tip alongside the main cutting edge tip, and these secondary cutting edge tips produce, so to speak, the lateral sides of the saw cut SAE that can be made into the workpiece W with the saw tool 15. In either case, the saw cut SAE has a saw cut width SBB that is brought about on the one hand by the length of the main cutting edge tip 380 and on the other hand also by the secondary cutting edge tips 381 that are inclined obliquely to the main cutting edge tip 380, similar to the secondary cutting edge tips 351 with respect to the main cutting edge tip 350.

[0250] Since the saw teeth 377 cut into the workpiece W from the workpiece bottom surface WU and thus exit the workpiece at the workpiece top surface WO, this entails the risk that the lateral sides of the saw cut SAE are peeled off in the region of the workpiece top surface WO. In that case, the grooving tool 35 can be adjusted or is adjusted such that the groove RI on the workpiece surface WO has a groove width RBB that is greater than the saw cut width SBB with respect to its penetration depth into the workpiece W or the extent to which the grooving tool 35 protrudes in front of the guide surface 19. Next, the saw tool 15 or the saw blade 15A exits the workpiece W between the lateral sides RF of the groove RI on the workpiece surface WO. That is, for example, if a coating or covering, a tensioning material or the like is arranged on the workpiece surface WO, the coating or covering is not affected or damaged by the saw teeth 377 exiting the workpiece W.

[0251] The inclination of the lateral sides RF has the advantage that the groove RI has a slight step or bevel in the transition region to the workpiece surface WO.

[0252] The sawing drive motor 12 has an outer diameter D12, and the grooving device drive motor 32 has an outer diameter D32. Regarding the outer diameters of the grooving tool 35 or the saw tool 15 driven respectively, the outer diameter D12 of the sawing drive motor 12 is smaller than the outer diameter D32 of the grooving device drive motor 32. Therefore, for example, the ratio of the outer circumference D73 to the outer circumference D12, or the quotient of the outer circumference D73 and the outer circumference D12, is larger than the ratio of the outer circumference D13 to the outer circumference D32 or the quotient of the outer circumference D13 and the outer circumference D32 of the grooving device drive motor 32.

[0253] By using the adjusting means 12B and / or 32B, for example, the rotational speeds of the saw tool housing 14 and the grooving device tool housing 34 can be adjusted. The grooving device tool housing 34 can always operate at the same rotational speed, while the rotational speed of the saw tool housing 14, for example, the rotational speed of the sawing drive motor 12, is adjustable. The grooving device tool housing 34 is configured to be driven or capable of being driven at a rotational speed that is at least twice, preferably three times, or four times the size of the saw tool housing 14.

[0254] Furthermore, the rotational directions VS and VR of the tool housings 14 and 34 are opposite. The tool housing 34 for the grooving tool 35 is driven, for example, in the rotational direction VR corresponding to a co-rotating saw. Therefore, that is, the rotational direction VR has the effect that the grooving tool 35 sends or advances the sawing machine 10 forward along the workpiece W so to speak.

[0255] The rotational direction VS of the saw tool housing 14 is such that the guide surface 19 applies a force in the direction of the workpiece surface WO.

[0256] In the case of the cutting body 330, the secondary cutting edge tip and the primary cutting edge tip are straight. However, instead of this, it is also possible that the primary cutting edge tip and the secondary cutting edge tip are curved, for example, extending in a concave shape, a convex shape, or a combination thereof, or that the secondary cutting edge tip and / or the primary cutting edge tip have portions with different inclinations and / or curvatures.

[0257] For example, while the cutting body 330B has a main cutting edge tip 350 that extends linearly, the sub-cutting edge tip 351B with the main cutting edge tip 350 disposed therebetween has edge portions 360B, 361B. The edge portion 360B extends linearly, for example. The edge portion 360B is perpendicular to the main cutting edge tip 350, for example. In contrast, the portion 361B is flattened and obliquely inclined with respect to the portion 360B and has an angle of, for example, 103 to 105° with respect to the main cutting edge tip 350.

[0258] The cutting body 330C also has a main cutting edge tip 350 but has a sub-cutting edge tip 351C provided with portions 360C and 361C. The portion 360C is concave with respect to the central plane MI that extends between the flat surfaces 311 and 312 of the blade body 310 but has a smaller curvature than the portion 361C.

[0259] To clarify the convex shape, a cutting body 330D is shown in which the sub-cutting edge tip 351D is concave with respect to the central plane MI.

[0260] Instead of the linear main cutting edge tip 350, a main cutting edge tip 350D that extends convexly in a direction away from the blade body 310, for example, can be provided.

[0261] Furthermore, it is advantageous if the cutting body or the knurling teeth of the knurling tool are, so to speak, symmetric, that is, on opposite sides, and thus cutting edge tips are formed in the regions of the respective flat surfaces 311, 312. However, it is also possible for the knurling teeth or the cutting body to have cutting edge tips only on one of the flat surfaces 311 or 312. This is schematically shown in the cutting body 330B. For example, in the cutting body 330B, instead of the sub-cutting edge tip 351B on the right side of the drawing, a side surface 359 that does not protrude in front of the flat surface 311 can be provided, and instead of the sub-cutting edge tip 351B on the left side of the drawing, a side surface 359 that does not protrude in front of the flat surface 312 can be provided on the cutting body 330B that trails or precedes in the circumferential direction of the blade body 310 or the knurling tool 35. The invention described in the original claims of the present application is appended below. [1] A grooving tool for a sawing machine (10), in the form of a hand-held sawing machine (10) or a semi-stationary sawing machine, or as a component of said sawing machine (10), said grooving tool (35) being formed to be driven rotatably about a rotational axis (DV) and comprising a disc-shaped blade body (310) having flat surfaces (311, 312) facing each other, said blade body having, at a center (ZV) penetrated by said rotational axis (DV), a mechanical receiving portion (315) for removably attaching to a grooving device tool receiving portion (34) of said sawing machine (10), and, on a radially outer periphery (313) with respect to said rotational axis (DV), a grooving tooth arrangement (300) for making grooves (RI) in a first work surface (WO) of a work (W), said grooving tooth arrangement (300) having at least one main cutting edge tip (350) for making a groove bottom (RB) of said groove (RI) extending transversely with respect to said flat surfaces (311, 312), and, transversely with respect to said at least one main cutting edge tip (350) and on opposite sides of each other with respect to said at least one main cutting edge tip (350), a secondary cutting edge tip (351) for making a groove lateral surface (RF) of said groove (RI), an end region (355) of said secondary cutting edge tip (351) provided for cutting said groove into said work (W) on a radially inner side with respect to said rotational axis (DV) having a radial distance (RD) with respect to said radially outer periphery (313) of said grooving tool (35), said radial distance enabling grooves (RI) of various depths to be made up to a maximum depth (Rmax) limited by said radial distance (RD) using said grooving tool (35), and said sawing machine (10) being able to make a saw cut (SAE) aligned with said groove (RI) by means of a sawing tool (15) into said work (W) from a second work surface (WU) opposite said first work surface (WO) of said work (W) with a saw cut width (SBB) of said saw cut (SAE) smaller than a groove width (RBB) of said groove (RI), thereby preventing said groove lateral surface (RF) of said work (W) from being scraped off. In the grooving tool, said grooving tooth arrangement (300) is a single grooving tooth (301 - 304), or at least 20° angular distances (WA, WB,A grooving tool, characterized by having at least two rib teeth (301-304) with WD). [2] The radial distance (RD) of the secondary cutting edge (351) for determining the maximum depth (Rmax) of the said grain (RI) is at least 1.2 mm, preferably at least 1.5 mm, more preferably at least 2 mm, still more preferably at least 2.3 mm or 2.5 mm, particularly at least 3 mm, characterized in that the grain insertion tool according to [1]. [3] The angular distances (WA, WB, WD) between the grain teeth (301 - 304) arranged successively on the outer periphery (313) of the said blade body (310) are at least 30°, preferably at least 45°, more preferably at least 60°, still more preferably at least 90°, characterized in that the grain insertion tool according to [1] or [2]. [4] At least two grain teeth (301 - 304), preferably all grain teeth (301 - 304) of the grain tooth arrangement (300) have the same or substantially the same angular distance (WA, WB, WD) from each other, characterized in that the grain insertion tool according to any one of [1] to [3]. [5] The said grain tooth arrangement (300) has a maximum of six grain teeth (301 - 304), preferably a maximum of five grain teeth (301 - 304), particularly a maximum of four grain teeth (301 - 304), more preferably a maximum of three grain teeth (301 - 304), or a maximum of two grain teeth (301 - 304), characterized in that the grain insertion tool according to any one of [1] to [4]. [6] The end region of the secondary cutting edge tip (351) that is radially outside with respect to the rotation axis (DV) has a first lateral distance (Q1) parallel to the rotation axis (DV), and the end region (355) provided for cutting the streak (RI) into the workpiece (W) that is radially inside with respect to the rotation axis (DV) of the secondary cutting edge tip (351) has a second lateral distance (Q2) parallel to the rotation axis (DV). The first lateral distance (Q1) determines the width of the streak (RI) at the bottom of the streak (RB), and the second lateral distance (Q2) determines the maximum width of the streak (RI) on the first workpiece surface (WO) of the workpiece (W). The second lateral distance (Q2) is at least as large as the first lateral distance (Q1), and is at most 1.5 mm, preferably at most 1 mm, particularly at most 0.8 mm, or at most 0.7 mm, more preferably at most 0.5 mm or 0.4 mm, and particularly 0.3 mm larger than the first lateral distance (Q1). The streak cutting tool according to any one of [1] to [5]. [7] At least one streak tooth (301 - 304), preferably all streak teeth (301 - 304) of the streak tooth arrangement (300) each have two secondary cutting edge tips (351), and a main cutting edge tip (350) extends between the two secondary cutting edge tips, or the streak tooth arrangement (300) has at least two streak teeth (301 - 304) arranged one after another in the circumferential direction of the blade body (310). The secondary cutting edge tips (351) of the streak teeth protrude in front of the flat surfaces (311, 312) on opposite sides of each other, and the streak teeth do not have a secondary cutting edge tip (351) in the region of the other flat surface (311, 312) respectively, or do not have a secondary cutting edge tip (351) that protrudes in front of the other flat surface (311, 312). The streak cutting tool according to any one of [1] to [6]. [8] The secondary cutting edge tip (351) extends in an arc shape and / or a concave shape in a direction away from the at least one main cutting edge tip (350). The streak cutting tool (35) according to any one of [1] to [7]. [9] The secondary cutting edge tip (351) and / or the at least one main cutting edge tip (350) extends linearly. The streak cutting tool according to any one of [1] to [8].

[10] The grooving tool according to any one of [1] to [9], characterized in that the secondary cutting edge tip (351) and the at least one primary cutting edge tip (350) form a trapezoidal shape in a cross-section.

[11] The grooving tool according to any one of [1] to

[10] , characterized in that the secondary cutting edge tip (351) is longer than the at least one primary cutting edge tip (350).

[12] The grooving tool according to any one of [1] to

[11] , characterized in that the at least one primary cutting edge tip (350) and the secondary cutting edge tip (351) form an angle with each other in their respective cutting regions, or have cutting regions that form an angle, and in the cutting region, the at least one primary cutting edge tip (350) and the respective secondary cutting edge tips (351) intersect at an angle.

[13] The grooving tool according to any one of [1] to

[12] , characterized in that the secondary cutting edge tip (351) as a whole, or in the cutting region, has an angle (WI) of at least 90°, or exactly 90°, and a maximum of 105°, particularly a maximum of 100°, more preferably a maximum of 98°, even more preferably a maximum of 97° or 96°, particularly a maximum of 94° with respect to the at least one primary cutting edge tip (350).

[14] The grooving tool according to any one of [1] to

[13] , characterized in that the secondary cutting edge tips (351) are parallel to each other, or have distances from each other that are smaller in a region (355) of the grooving tool (35) that is radially inward with respect to the rotation axis (DV) and far from the at least one primary cutting edge tip (350) in a region of the at least one primary cutting edge tip (350).

[15] The grooving tool according to any one of [1] to

[14] , characterized in that the blade body (310) has a substantially circular outer periphery (313) with respect to the rotation axis (DV), has the at least one primary cutting edge tip (350), or has the primary cutting edge tip (350), and a cutting body (330) arranged on the blade body (310) projects radially outward with respect to the rotation axis (DV) in front of the outer periphery (313) of the blade body (310) at a radial distance.

[16] The grooving tool according to any one of [1] to

[15] , characterized in that the at least one secondary cutting edge (351), in particular the cutting body (330) having the secondary cutting edge (351), protrudes in front of the respective flat surfaces (311, 312) of the blade body (310) where the secondary cutting edge (351) is arranged.

[17] The grooving tool according to any one of [1] to

[16] , characterized in that at least one grooving tooth (301 - 304) of the grooving tooth arrangement (300), preferably all the grooving teeth (301 - 304) of the grooving tooth arrangement (300), are provided with a cutting body (330) arranged on the blade body (310), the cutting body having at least one secondary cutting edge (351) at least partially and preferably two secondary cutting edges (351) on opposite sides to the main cutting edge (350), and the cutting body (330) being made of a material harder than the blade body (310).

[18] The grooving tool according to

[17] , characterized in that the cutting body (330) has a Vickers hardness of at least 1500 HV (HV = Vickers hardness), preferably at least 2000 or 3000 HV, particularly preferably at least 3500 HV, more preferably at least 3800 HV or at least 4000 HV, and particularly preferably at least 4500 HV or at least 5000 HV, and / or the cutting body (330) is made of a diamond material or polycrystalline diamond material or hard metal having a hardness of at least 1000 HV in particular.

[19] The grooving tool according to

[17] or

[18] , characterized in that the cutting body (330) is supported by the blade body (310) on the back surface in the cutting direction in the region of at least a part of the main cutting edge (350) and at least one secondary cutting edge (351) for cutting into the workpiece (W), and / or the blade body (310) has an outer peripheral contour that is convex with respect to the rotation axis (DV), in particular an annular shape, on the back surface of the cutting body (330).

[20] The grooving tool according to any one of [1] to

[19] , characterized in that the blade body (310) extends radially outward with respect to the rotation axis (DV) adjacent to the at least one secondary cutting edge (351) up to the end region of the main cutting edge (350).

[21] A chip space (316) is arranged in front of at least one rib tooth (301 - 304) of the rib tooth arrangement (300), preferably in front of all rib teeth (301 - 304). The chip space (316) extends in a V - shape or U - shape radially inward with respect to the rotation axis (DV) from the radially outer periphery (313) of the blade body (310), and / or extends over an angular range of up to 30°, preferably up to 20° or 15° with respect to the rotation axis (DV). The grooving tool according to any one of [1] to

[20] .

[22] The blade body (310) has a substantially circular outer periphery (313) with respect to the rotation axis (DV), and a chip space (316) is provided only in the cutting direction in front of the at least one main cutting edge (350) for cutting into the workpiece (W). The grooving tool according to any one of [1] to

[21] .

[23] The grooving tool according to any one of [1] to

[22] , characterized in that it is formed and / or contemplated to operate at a working rotational speed of 15,000 revolutions to 25,000 revolutions per minute.

[24] In a system comprising the grooving tool (35) according to any one of [1] to

[23] or the premise part of [1], and a saw tool (15) in the form of a saw blade (15A) for a sawing machine (10), the saw blade (15A) comprises a disk - shaped saw blade body (370) having flat surfaces (371, 372) facing each other. The saw blade body has a mechanical receiving part (375) for detachably attaching to the saw tool receiving part (14) of the sawing machine (10) at a center (ZS) penetrated by the rotation axis (DV). A saw tooth arrangement (376) having saw teeth (377) arranged in a circumferential sequence is arranged on the radially outer periphery (373) of the saw blade body with respect to the rotation axis (DV). The number of saw teeth (377) of the saw blade (15A) is greater than the number of rib teeth (301 - 304) of the grooving tool (35). A system.

[25] The system according to

[24] , characterized in that the material of the main cutting edge (350) of the grooving tool (35) is at least 50% harder than the material of the main cutting edge (350) of the saw blade (15A) extending transversely with respect to the flat surfaces (371, 372) of the saw blade (15A).

[26] The outer diameter (D13) of the grooving tool (35) is at most 50%, preferably at most 40%, in particular at most 30% of the outer diameter (D73) of the saw blade (15A), and / or the mechanical receiving part (315) of the grooving tool (35) is smaller than the mechanical receiving part (375) of the saw blade (15A), in particular the inner diameter (D15) of the mechanical receiving part (315) of the grooving tool (35) is at most half the size of the inner diameter (D75) of the mechanical receiving part (375) of the saw blade (15A), and / or the ratio of the outer diameter (D73) of the saw blade (15A) to the mechanical receiving part (375) of the saw blade (15A) differs from the ratio of the outer diameter (D13) of the grooving tool (35) to the mechanical receiving part (315) of the grooving tool (35) by at most 30%, and / or the cutting width of the grooving tool (35) is at least 0.05 mm larger than the cutting width of the saw blade (15A), the system according to

[24] or

[25] .

[27] The system according to any one of

[24] to

[26] , characterized in that the blade body (310) of the grooving tool (35) has a greater thickness than the blade body (370) of the saw blade (15A), and the thickness of the blade body (310) is determined by the distance between the respective flat surfaces (311, 312, 371, 372) of the blade bodies (310, 370).

[28] The system according to any one of

[24] to

[27] , characterized in that the grooving tool (35) is formed and intended to enter the workpiece (W) at a penetration depth smaller than that of the saw blade (15A) and / or to operate at a working rotational speed of at most 50% of the working rotational speed of the saw blade (15A).

[29] A sawing machine (10) comprising a grooving tool according to any one of [1] to

[23] , or a system having a grooving tool (35) and a sawing tool (15) according to any one of

[24] to

[28] , particularly a hand-held sawing machine or a semi-stationary sawing machine, wherein the sawing machine (10) includes a sawing tool housing portion (14) driven by a sawing drive device (12A) for the sawing tool (15) to make a saw cut (SAE) in a workpiece (W) along a working direction, and a grooving unit (31) disposed in front of the sawing tool housing portion (14) in the working direction and having a grooving device tool housing portion (34) for the grooving tool (35) driven by a grooving device drive device (32A).

[30] During the sawing operation of the sawing machine (10), the operating rotational speed of the sawing tool housing portion (14) is smaller than the operating rotational speed of the grooving device tool housing portion (34), particularly the operating rotational speed of the sawing tool housing portion (14) corresponds to at most 50%, preferably at most 30%, more preferably at most 25% or 20% of the operating rotational speed of the grooving device tool housing portion (34). The sawing machine according to

[29] .

[31] During the sawing operation of the sawing machine (10), the operating rotational speed of the sawing tool housing portion (14) is about 3000 revolutions per minute to about 7000 revolutions per minute, and / or the operating rotational speed of the grooving device tool housing portion (34) is 15,000 revolutions to 25,000 revolutions per minute. The sawing machine according to

[29] or

[30] .

[32] The sawing machine according to any one of

[29] to

[31] , characterized in that the sawing tool housing portion (14) and the grooving device tool housing portion (34) are driven in opposite rotational directions.

[33] The ratio of the rotational speed of the sawing tool housing portion (14) to the rotational speed of the grooving device tool housing portion (34) is such that, particularly, the output rotational speed of the sawing drive device (12A) and / or the grooving device drive device (32A) can be adjusted so that the cutting speed of the saw blade (15A) is in the range of about 50% to 200%, particularly about 80% to 120% of the cutting speed of the grooving tool (35). The sawing machine according to any one of

[29] to

[32] .

[34] The ratio of the rotational speed of the sawing tool housing part (14) to the rotational speed of the grooving device tool housing part (34) is such that, in particular, when the output rotational speed of the sawing drive device (12A) and / or the grooving device drive device (32A) is considered, when the grooving device tool housing part (34) and the grooving tool (35) are combined, the product of the rotational speed at the radially outer circumference (313) of the grooving tool (35) and the number of grooving teeth (301 - 304) is at most 80%, preferably at most 60%, more preferably at most 40% or 30% of the product of the rotational speed at the radially outer circumference (373) of the saw blade (15A) and the number of saw teeth (377). The sawing machine according to any one of

[29] to

[33] is characterized in that it is adjustable as such.

[35] The ratio of the outer diameter (D73) of the saw blade (15A) to the outer diameter (D12) of the said or one sawing drive motor (12) that drives the sawing tool housing part (14) is larger than the ratio of the outer diameter (D13) of the grooving tool (35) to the outer diameter (D32) of the said or one grooving device drive motor (32) that drives the grooving device tool housing part (34), in particular at least 1.5 times larger, preferably 2 times larger, more preferably 2.5 times larger. The sawing machine according to any one of

[29] to

[34] is characterized by this.

[36] It is formed as a hand-held sawing machine and has a guide device (17). The guide device has a guide body (18) with a guide surface (19) extending along the longitudinal axis for guiding the hand-held sawing machine (10) along the working direction in a guide rail where the work piece (W), or the sawing drive device (12A) and the grooving device drive device (32A) are arranged. During the sawing operation of the hand-held working machine, a saw cut (SAE) can be made in the work piece (W) along the working direction using the saw tool (15) protruding in front of the guide surface (19). The grooving unit (31) is arranged in the guide device (17) in front of the saw unit (11) with respect to the working direction, and during the grooving operation of the hand-held working machine, a groove (RI) placed in front of the saw cut (SAE) to be made in the working direction can be made in the work piece (W) using the grooving tool (35) protruding in front of the guide surface (19). The sawing machine according to any one of

[29] to

[35] is characterized by this.

Claims

1. A grooving tool for a sawing machine (10), in the form of a hand-held sawing machine (10) or a semi-stationary sawing machine, or as a component of said sawing machine (10), said grooving tool (35) being formed to be driven rotatably about a rotational axis (DV) and comprising a disc-shaped blade body (310) having flat surfaces (311, 312) facing each other, said blade body having, at a center (ZV) penetrated by said rotational axis (DV), a mechanical receiving part (315) for detachably attaching to a grooving device tool receiving part (34) of said sawing machine (10), and, on a radially outer periphery (313) with respect to said rotational axis (DV), a grooving tooth arrangement (300) for making a groove (RI) in a first work surface (WO) of a work (W), said grooving tooth arrangement (300) having at least one main cutting edge tip (350) for making a groove bottom (RB) of said groove (RI) extending transversely with respect to said flat surfaces (311, 312), and, transversely with respect to said at least one main cutting edge tip (350) and on opposite sides of each other with respect to said at least one main cutting edge tip (350), a secondary cutting edge tip (351) for making a groove lateral surface (RF) of said groove (RI), an end region (355) of said secondary cutting edge tip (351) provided for cutting said groove into said work (W) on a radially inner side with respect to said rotational axis (DV) having a radial distance (RD) with respect to said radially outer periphery (313) of said grooving tool (35), said radial distance enabling grooves (RI) of various depths to be made up to a maximum depth (Rmax) limited by said radial distance (RD) using said grooving tool (35), and said sawing machine (10) being able to make a saw cut (SAE) aligned with said groove (RI) by means of a saw tool (15) into said work (W) from a second work surface (WU) opposite to said first work surface (WO) of said work (W) with a saw cut width (SBB) of said saw cut (SAE) smaller than a groove width (RBB) of said groove (RI), thereby preventing said groove lateral surface (RF) of said work (W) from being scraped off, in a grooving tool, said grooving tooth arrangement (300) having a maximum of four grooving teeth (301 - 304), A grooving tool, characterized in that a chip space (316) is arranged in front of at least one grooving tooth (301-304) of the grooving tooth array (300), and the chip space (316) extends radially inward with respect to the rotational axis (DV) in a V-shape or a U-shape from the radial outer periphery (313) of the blade body (310), and / or extends over an angular range of at most 30° around the rotational axis (DV). **Claim 2** The grooving tool according to claim 1, characterized in that the radial distance (RD) of the secondary cutting edge tip (351) for determining the maximum depth (Rmax) of the groove (RI) is at least 1.2 mm. **Claim 3** The grooving tool according to claim 1 or claim 2, characterized in that the angular distances (WA, WB, WD) between the grooving teeth (301-304) arranged one after another on the radial outer periphery (313) of the blade body (310) are at least 60°. **Claim 4** The grooving tool according to any one of claims 1 to 3, characterized in that at least two grooving teeth (301-304) of the grooving tooth array (300) have the same angular distance (WA, WB, WD) from each other. **Claim 5** The grooving tool according to any one of claims 1 to 4, characterized in that the grooving tooth array (300) has at most three grooving teeth (301-304), or at most two grooving teeth (301-304). **Claim 6** The end region radially outside with respect to the rotation axis (DV) of the sub-cutting edge tip (351) has a first lateral distance (Q1) parallel to the rotation axis (DV), and the end region (355) provided for cutting the grain (RI) into the workpiece (W) radially inside with respect to the rotation axis (DV) of the sub-cutting edge tip (351) has a second lateral distance (Q2) parallel to the rotation axis (DV), the first lateral distance (Q1) determines the width of the grain (RI) at the grain bottom (RB), the second lateral distance (Q2) determines the maximum width of the grain (RI) on the first workpiece surface (WO) of the workpiece (W), the second lateral distance (Q2) is at least the same size as the first lateral distance (Q1), and is at most 1.5 mm larger than the first lateral distance (Q1), the grain insertion tool according to any one of claims 1 to 5.

7. At least one grain tooth (301 - 304) of the grain tooth arrangement (300) has two sub-cutting edge tips (351) respectively, and a main cutting edge tip (350) extends between the two sub-cutting edge tips, the grain insertion tool according to any one of claims 1 to 6.

8. The grain tooth arrangement (300) has at least two grain teeth (301 - 304) arranged one after another in the circumferential direction of the blade body (310), the sub-cutting edge tips (351) of the grain teeth protrude from flat surfaces (311, 312) on opposite sides, and the grain teeth do not have a sub-cutting edge tip (351) in the region of the other flat surface (311, 312) or do not have a sub-cutting edge tip (351) protruding from the other flat surface (311, 312), the grain insertion tool according to any one of claims 1 to 6.

9. The sub-cutting edge tip (351) extends in an arc shape and / or a concave shape in a direction away from the at least one main cutting edge tip (350), the grain insertion tool (35) according to any one of claims 1 to 8.

10. The grooving tool according to any one of claims 1 to 9, characterized in that the sub-cutting edge (351) and / or the at least one main cutting edge (350) extends linearly.

11. The grooving tool according to any one of claims 1 to 10, characterized in that the sub-cutting edge (351) and the at least one main cutting edge (350) form a trapezoidal shape in cross-section.

12. The grooving tool according to any one of claims 1 to 11, characterized in that the sub-cutting edge (351) is longer than the at least one main cutting edge (350).

13. The grooving tool according to any one of claims 9 to 12, citing claim 7 or claim 8, characterized in that the at least one main cutting edge (350) and the sub-cutting edge (351) form an angle with each other in their respective cutting regions, or have a cutting region that forms an angle, and in the cutting region, the at least one main cutting edge (350) and the respective sub-cutting edge (351) intersect at an angle.

14. The grooving tool according to any one of claims 1 to 13, characterized in that the sub-cutting edge (351) as a whole, or in the cutting region, has an angle (WI) of at least 90° and at most 105° with respect to the at least one main cutting edge (350).

15. The grooving tool according to any one of claims 1 to 14, characterized in that the sub-cutting edges (351) are parallel to each other, or have a smaller distance from each other in a region of the grooving tool (35) that is radially inward of the at least one main cutting edge (350) with respect to the rotation axis (DV), and farther from the at least one main cutting edge (350).

16. The blade body (310) has a circular radial outer periphery (313) with respect to the rotation axis (DV), and has the at least one main cutting edge tip (350), or the main cutting edge tip (350), and a cutting body (330) disposed on the blade body (310) protrudes radially outward from the radial outer periphery (313) of the blade body (310) by a radial distance with respect to the rotation axis (DV). The grooving tool according to any one of claims 1 to 15.

17. A cutting body (330) having the at least one sub-cutting edge tip (351) protrudes from the respective flat surfaces (311, 312) of the blade body (310) where the sub-cutting edge tip (351) is disposed. The grooving tool according to any one of claims 1 to 16.

18. At least one grooving tooth (301 to 304) of the grooving tooth arrangement (300) includes a cutting body (330) disposed on the blade body (310). The cutting body has the main cutting edge tip (350) and at least partially at least one sub-cutting edge tip (351). The cutting body (330) is made of a material harder than the blade body (310). The grooving tool according to any one of claims 1 to 17.

19. The cutting body (330) has at least 1500 HV (HV = Vickers hardness), and / or the cutting body (330) is made of a diamond material or a polycrystalline diamond material or a hard metal having a hardness of at least 1000 HV. The grooving tool according to claim 18.

20. The cutting body (330) is supported by the blade body (310) in a region of at least a part of the main cutting edge tip (350) and the at least one sub-cutting edge tip (351) on the back surface with respect to the cutting direction, the at least one main cutting edge tip (350) and the at least one sub-cutting edge tip (351) being provided for cutting into the workpiece (W), and / or the blade body (310) has an outer peripheral contour convex with respect to the rotation axis (DV) on the back surface of the cutting body (330). The grooving tool according to claim 18 or claim 19.

21. The grooving tool according to any one of claims 1 to 20, characterized in that the blade body (310) extends radially outward with respect to the rotation axis (DV) next to the at least one sub-cutting edge tip (351) up to the end region of the main cutting edge tip (350).

22. The grooving tool according to any one of claims 1 to 21, characterized in that the blade body (310) has a substantially circular radial outer periphery (313) with respect to the rotation axis (DV), and a chip space (316) is provided only in the cutting direction in front of the outer periphery, the at least one main cutting edge tip (350) being provided for cutting into the workpiece (W).

23. A grooving tool for a sawing machine (10), which is in the form of a hand-held sawing machine (10) or a semi-stationary sawing machine, or as a component of said sawing machine (10), said grooving tool (35) being formed to be driven rotatably about a rotational axis (DV) and comprising a disc-shaped blade body (310) having flat surfaces (311, 312) facing each other, said blade body having a mechanical receiving portion (315) for detachably attaching to a grooving device tool receiving portion (34) of said sawing machine (10) at a center (ZV) penetrated by said rotational axis (DV), and a grooving tooth arrangement (300) for making grooves (RI) in a first work surface (WO) of a work (W) on a radially outer periphery (313) with respect to said rotational axis (DV), said grooving tooth arrangement (300) having at least one main cutting edge (350) for making a groove bottom (RB) of said groove (RI) extending laterally with respect to said flat surfaces (311, 312), and a secondary cutting edge (351) for making a groove lateral surface (RF) of said groove (RI) laterally with respect to said at least one main cutting edge (350) and on opposite sides of said at least one main cutting edge (350), an end region (355) of said secondary cutting edge (351) provided for cutting said groove into said work (W) on a radially inner side with respect to said rotational axis (DV) having a radial distance (RD) with respect to said radially outer periphery (313) of said grooving tool (35), said radial distance enabling grooves (RI) of various depths to be made up to a maximum depth (Rmax) limited by said radial distance (RD) using said grooving tool (35), and said sawing machine (10) being able to make a saw cut (SAE) aligned with said groove (RI) by means of a saw tool (15) into said work (W) from a second work surface (WU) opposite to said first work surface (WO) of said work (W) with a saw cut width (SBB) of said saw cut (SAE) smaller than a groove width (RBB) of said groove (RI), thereby preventing said groove lateral surface (RF) of said work (W) from being scraped off, in the grooving tool. The grooving tooth arrangement (300) has a maximum of four grooving teeth (301 to 304). A grooving tool, characterized in that it is formed and / or contemplated to operate at an operating rotational speed of 15,000 to 25,000 revolutions per minute.

24. In a system comprising a grooving tool (35) according to any one of Claims 1 to 23 and a saw tool (15) in the form of a saw blade (15A) for a sawing machine (10), the saw blade (15A) comprises a disc-shaped saw blade body (370) having flat surfaces (371, 372) facing each other, the saw blade body having a mechanical receiving portion (375) at a center (ZS) penetrated by a rotation axis (DS) for detachably attaching to a sawing tool receiving portion (14) of the sawing machine (10), a saw tooth arrangement (376) having saw teeth (377) arranged in a circumferential direction and spaced apart from each other in a radial outer periphery (373) of the saw blade body with respect to the rotation axis (DS) is arranged, the number of the saw teeth (377) of the saw blade (15A) is larger than the number of the grooving teeth (301 to 304) of the grooving tool (35), The material of the main cutting edge (350) of the grooving tool (35) is at least 50% harder than the material of the main cutting edge (350) of the saw blade (15A) extending laterally with respect to the flat surfaces (371, 372) of the saw blade (15A), the system being characterized thereby.

25. The outer diameter (D13) of the grooving tool (35) is at most 50% of the outer diameter (D73) of the saw blade (15A), and / or the mechanical receiving portion (315) of the grooving tool (35) is smaller than the mechanical receiving portion (375) of the saw blade (15A), and / or the ratio between the outer diameter (D73) of the saw blade (15A) and the mechanical receiving portion (375) of the saw blade (15A) differs from the ratio between the outer diameter (D13) of the grooving tool (35) and the mechanical receiving portion (315) of the grooving tool (35) by at most 30%, and / or the cutting width of the grooving tool (35) is at least 0.05 mm larger than the cutting width of the saw blade (15A), the system according to Claim 24 being characterized thereby.

26. In a system comprising a grooving tool (35) according to any one of claims 1 to 23 and a saw tool (15) in the form of a saw blade (15A) for a sawing machine (10), the saw blade (15A) comprises a disc-shaped saw blade body (370) having flat surfaces (371, 372) facing each other, the saw blade body has a mechanical receiving portion (375) at a center (ZS) penetrated by a rotation axis (DS) for detachably attaching to a sawing tool receiving portion (14) of the sawing machine (10), a saw tooth arrangement (376) having saw teeth (377) arranged in a circumferential direction is arranged on a radially outer periphery (373) of the saw blade body with respect to the rotation axis (DS), and the number of the saw teeth (377) of the saw blade (15A) is larger than the number of the grooving teeth (301 to 304) of the grooving tool (35). The blade body (310) of the grooving tool (35) has a thickness larger than that of the blade body (370) of the saw blade (15A), and the thickness of the blade body (310) is determined by a distance between the respective flat surfaces (311, 312, 371, 372) of the blade bodies (310, 370), the system being characterized thereby.

27. The grooving tool (35) is formed and designed to enter the workpiece (W) at a penetration depth smaller than that of the saw blade (15A) and / or to operate at a working rotational speed of at most 50% of the working rotational speed of the saw blade (15A), the system according to any one of claims 24 to 26 being characterized thereby.

28. A sawing machine (10) comprising the grooving tool according to any one of claims 1 to 23 or the system according to any one of claims 24 to 27, the sawing machine (10) comprising a sawing tool receiving portion (14) motor-driven by a sawing drive device (12A) for the saw tool (15) in the form of a saw blade (15A) for making a saw cut (SAE) in a workpiece (W) along a working direction, and a grooving unit (31) having a grooving device tool receiving portion (34) for the grooving tool (35), which is arranged in front of the sawing tool receiving portion (14) in the working direction and is driven by a grooving device drive device (32A). Claim 29 The sawing machine according to claim 28, characterized in that, during the sawing operation of the sawing machine (10), the operating rotational speed of the sawing tool accommodating part (14) is smaller than the operating rotational speed of the grooving device tool accommodating part (34). Claim 30 The sawing machine according to claim 28 or claim 29, characterized in that, during the sawing operation of the sawing machine (10), the operating rotational speed of the sawing tool accommodating part (14) is about 3,000 revolutions per minute to about 7,000 revolutions per minute, and / or the operating rotational speed of the grooving device tool accommodating part (34) is 15,000 revolutions to 25,000 revolutions per minute. Claim 31 The sawing machine according to any one of claims 28 to 30, characterized in that the sawing tool accommodating part (14) and the grooving device tool accommodating part (34) are driven in opposite rotational directions. Claim 32 The sawing machine according to any one of claims 28 to 31, characterized in that the ratio of the rotational speed of the sawing tool accommodating part (14) to the rotational speed of the grooving device tool accommodating part (34) can be adjusted so that the cutting speed of the saw blade (15A) is in the range of about 50% to 200% of the cutting speed of the grooving tool (35). Claim 33 A sawing machine (10), A grooving tool for a sawing machine (10), in the form of a hand-held sawing machine (10) or a semi-stationary sawing machine, or as a component of said sawing machine (10), wherein said grooving tool (35) is formed to be driven rotatably about a rotational axis (DV) and comprises a disc-shaped blade body (310) having flat surfaces (311, 312) facing each other, said blade body having a mechanical receiving portion (315) for detachably attaching to a grooving device tool receiving portion (34) of said sawing machine (10) at a center (ZV) penetrated by said rotational axis (DV), and a grooving tooth arrangement (300) for making grooves (RI) in a first work surface (WO) of a work (W) on a radially outer periphery (313) with respect to said rotational axis (DV), said grooving tooth arrangement (300) having at least one main cutting edge (350) for making a groove bottom (RB) of said groove (RI) extending transversely with respect to said flat surfaces (311, 312), and a secondary cutting edge (351) for making a groove lateral surface (RF) of said groove (RI) transversely with respect to said at least one main cutting edge (350) and on opposite sides of said at least one main cutting edge (350), an end region (355) of said secondary cutting edge (351) provided for cutting said groove into said work (W) on a radially inner side with respect to said rotational axis (DV) having a radial distance (RD) with respect to said radially outer periphery (313) of said grooving tool (35), said radial distance enabling grooves (RI) of various depths to be made up to a maximum depth (Rmax) limited by said radial distance (RD) using said grooving tool (35), and said sawing machine (10) being able to make a saw cut (SAE) aligned with said groove (RI) by means of a sawing tool (15) into said work (W) from a second work surface (WU) opposite to said first work surface (WO) of said work (W) with a saw cut width (SBB) of said saw cut (SAE) smaller than a groove width (RBB) of said groove (RI), thereby preventing said groove lateral surface (RF) of said work (W) from being scraped off. The sawing machine (10) has a saw tool (15) in the form of a saw blade (15A) for the sawing machine (10), the saw blade (15A) comprising a disc-shaped saw blade body (370) having flat surfaces (371, 372) facing each other, the saw blade body having a mechanical receiving portion (375) at a center (ZS) penetrated by a rotation axis (DS) for detachably attaching to a sawing tool receiving portion (14) of the sawing machine (10), a saw tooth arrangement (376) having saw teeth (377) arranged in the circumferential direction and successively in the radial outer circumference (373) of the saw blade body with respect to the rotation axis (DS) is arranged, and the number of the saw teeth (377) of the saw blade (15A) is larger than the number of the grooving teeth (301 to 304) of the grooving tool (35). The sawing machine (10) includes a sawing tool receiving portion (14) driven by a sawing drive device (12A) for the saw tool (15) for making a saw cut (SAE) in a workpiece (W) along a working direction, and a grooving unit (31) having a grooving tool receiving portion (34) for the grooving tool (35) arranged in front of the sawing tool receiving portion (14) in the working direction and driven by a grooving device drive device (32A). The ratio of the rotational speed of the sawing tool receiving portion (14) to the rotational speed of the grooving tool receiving portion (34) is adjustable such that when the grooving tool receiving portion (34) and the grooving tool (35) are combined, the product of the rotational speed at the radial outer circumference (313) of the grooving tool (35) and the number of grooving teeth (301 to 304) is at most 80% of the product of the rotational speed at the radial outer circumference (373) of the saw blade (15A) and the number of saw teeth (377). A sawing machine characterized by this.

34. A sawing machine (10), A grooving tool for a sawing machine (10) in the form of a hand-held sawing machine (10) or a semi-stationary sawing machine, or as a component of said sawing machine (10), wherein said grooving tool (35) is formed to be driven rotatably about a rotation axis (DV) and comprises a disk-shaped blade body (310) having flat surfaces (311, 312) facing each other, said blade body having a mechanical receiving part (315) for detachably attaching to a grooving device tool receiving part (34) of said sawing machine (10) at a center (ZV) penetrated by said rotation axis (DV), and a grooving tooth arrangement (300) for making a groove (RI) in a first work surface (WO) of a work (W) on a radially outer periphery (313) with respect to said rotation axis (DV), said grooving tooth arrangement (300) having at least one main cutting edge tip (350) for making a groove bottom (RB) of said groove (RI) extending transversely to said flat surfaces (311, 312), and a secondary cutting edge tip (351) for making a groove lateral surface (RF) of said groove (RI) transversely to said at least one main cutting edge tip (350) and on opposite sides of said at least one main cutting edge tip (350), an end region (355) of said secondary cutting edge tip (351) provided for cutting said groove into said work (W) on an inner side in the radial direction with respect to said rotation axis (DV) having a radial distance (RD) with respect to said radially outer periphery (313) of said grooving tool (35), said radial distance enabling grooves (RI) of various depths to be made up to a maximum depth (Rmax) limited by said radial distance (RD) using said grooving tool (35), and said sawing machine (10) being able to make a saw cut (SAE) aligned with said groove (RI) by means of a saw tool (15) into said work (W) from a second work surface (WU) opposite to said first work surface (WO) of said work (W) with a saw cut width (SBB) of said saw cut (SAE) smaller than a groove width (RBB) of said groove (RI), thereby preventing said groove lateral surface (RF) of said work (W) from being scraped off. The sawing machine (10) has a saw tool (15) in the form of a saw blade (15A) for the sawing machine (10), the saw blade (15A) comprising a disc-shaped saw blade body (370) having flat surfaces (371, 372) facing each other, the saw blade body having a mechanical receiving portion (375) at a center (ZS) penetrated by a rotation axis (DS) for detachably attaching to a sawing tool receiving portion (14) of the sawing machine (10), a saw tooth arrangement (376) having saw teeth (377) arranged in the circumferential direction one after another being arranged at a radially outer circumference (373) of the saw blade body with respect to the rotation axis (DS), the number of the saw teeth (377) of the saw blade (15A) being larger than the number of the grooving teeth (301 to 304) of the grooving tool (35). The sawing machine (10) comprises a sawing tool receiving portion (14) driven by a sawing drive (12A) for the saw tool (15) for making a saw cut (SAE) in a workpiece (W) along a working direction, and a grooving unit (31) having a grooving tool receiving portion (34) for the grooving tool (35) arranged in front of the sawing tool receiving portion (14) in the working direction and driven by a grooving device drive (32A). A sawing machine, characterized in that a ratio of an outer diameter (D73) of the saw blade (15A) to an outer diameter (D12) of the said or one sawing drive motor (12) driving the sawing tool receiving portion (14) is larger than a ratio of an outer diameter (D13) of the grooving tool (35) to an outer diameter (D32) of the said or one grooving device drive motor (32) driving the grooving tool receiving portion (34).

35. Formed as a hand-held sawing machine and having a guide device (17), the guide device having a guide body (18) with a guide surface (19) extending along a longitudinal axis for guiding the hand-held sawing machine (10) along a working direction in a guide rail in which a workpiece (W), or the sawing drive device (12A) and the grooving device drive device (32A) are arranged, during the sawing operation of the hand-held working machine, a saw cut (SAE) can be made in the workpiece (W) along the working direction using the saw tool (15) protruding from the guide surface (19), the grooving unit (31) is arranged on the guide device (17) in front of the hand-held sawing machine with respect to the working direction, and during the grooving operation of the hand-held working machine, a groove (RI) pre-positioned in the working direction can be made in the workpiece (W) in the saw cut (SAE) to be made using the grooving tool (35) protruding from the guide surface (19). The sawing machine according to any one of claims 28 to 34, characterized in that.

36. A grooving tool for a sawing machine (10) in the form of a hand-held sawing machine (10) or a semi-stationary sawing machine, or as a component of said sawing machine (10), said grooving tool (35) being formed to be driven rotatably about a rotation axis (DV) and comprising a disc-shaped blade body (310) having flat surfaces (311, 312) facing each other, said blade body having a mechanical receiving part (315) for removably attaching to a grooving device tool receiving part (34) of said sawing machine (10) at a center (ZV) penetrated by said rotation axis (DV), and a grooving tooth arrangement (300) for making grooves (RI) in a first work surface (WO) of a work (W) on a radially outer periphery (313) with respect to said rotation axis (DV), said grooving tooth arrangement (300) having at least one main cutting edge tip (350) for making a groove bottom (RB) of said groove (RI) extending transversely with respect to said flat surfaces (311, 312), and a secondary cutting edge tip (351) for making a groove lateral surface (RF) of said groove (RI) transversely with respect to said at least one main cutting edge tip (350) and on opposite sides of each other with respect to said at least one main cutting edge tip (350), an end region (355) of said secondary cutting edge tip (351) provided for cutting said groove in said work (W) on a radially inner side with respect to said rotation axis (DV) having a radial distance (RD) with respect to said radially outer periphery (313) of said grooving tool (35), said radial distance enabling grooves (RI) of various depths to be made up to a maximum depth (Rmax) limited by said radial distance (RD) using said grooving tool (35), and said sawing machine (10) being able to make a saw cut (SAE) aligned with said groove (RI) by a sawing tool (15) into said work (W) from a second work surface (WU) opposite to said first work surface (WO) of said work (W) with a saw cut width (SBB) of said saw cut (SAE) smaller than a groove width (RBB) of said groove (RI), thereby preventing said groove lateral surface (RF) of said work (W) from being scraped off, in the grooving tool. The grooving tooth arrangement (300) has a maximum of four grooving teeth (301 to 304). A chip space (316) is arranged in front of at least one rib tooth (301-304) of the rib tooth array (300), and the chip space (316) extends radially inward with respect to the rotation axis (DV) in a V-shape or a U-shape from the radially outer periphery (313) of the blade body (310), and / or extends over an angular range of at most 30° around the rotation axis (DV). A grooving tool, characterized in that the angular distances (WA, WB, WD) between the rib teeth (301-304) arranged one after another on the radially outer periphery (313) of the blade body (310) are at least 45°.

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