Sawing machine and method for sawing reinforced aerated concrete panels

Abstract

This invention relates to a sawing machine and a method for sawing reinforced aerated concrete panels. The sawing machine includes: a first sawing unit having a first sawing plane and a second sawing unit having a second sawing plane, wherein the two sawing planes are not arranged parallel to each other or cannot be adjusted to be parallel to each other; wherein both the first and second sawing units are mounted on a common carrier device and, in each case, can be independently moved relative to the carrier device with a associated feed movement to or from a workpiece, in each case via an associated feed driver; wherein at least the first sawing unit is movable relative to the carrier device for positioning relative to the workpiece with a positioning movement independent of the feed movement via the feed driver; wherein the carrier device, together with the two sawing units, is movable relative to the workpiece with a working movement via the driver.

Description

[0001] The present invention relates to a saw and a method for sawing workpieces, particularly building elements for buildings, preferably reinforced sheet elements such as aerated concrete panels.

[0002] Steel-reinforced sheet metal elements (or sheet, planar, or slab elements) made specifically of aerated concrete are also known as structural elements used to construct buildings and houses, particularly for walls, ceilings, and even roofs. These sheet metal elements typically have a basic rectangular or cuboid shape, with the wall or ceiling thickness as the depth, a width of, for example, 60 cm, and a length of, for example, the room height. The sheet metal elements are attached to the steel beams of the supporting structure by welded plates attached to steel reinforcements, thus forming, for example, walls or ceilings.

[0003] Special geometries appear in certain locations of houses or buildings, such as shortened heights at pedestals or sloping surfaces at gables or L-shaped lintels for doors and windows. For such special geometries, it is known to use specially constructed circular or band saws to process panel elements with special cuts and adapt them to the desired geometry. Besides simply making shortened cuts, such as height cuts, one should also mention L-shaped cuts with perpendicular cutting surfaces, or mitre cuts with surfaces at 90° angles to each other, or gable cuts or bevel cuts, or shifter cuts with surfaces tilted in two directions. Various panel elements adjusted by sawing can be supplied to specific buildings after factory assembly, whereby appropriate component assemblies and control software can be used to assemble building component groups and calculate and execute efficient control sequences for sawing. Here, the goal is to achieve precise dimensional machining through sawing and to achieve the most efficient handling of planar elements in terms of avoiding waste and cut length.

[0004] The present invention is intended to specifically describe a new sawing machine and a new sawing method. The sawing machine and sawing method are particularly suitable for processing aerated concrete panel components, and also preferably allow for high processing accuracy and high processing speed.

[0005] In one embodiment, a saw is provided for sawing workpieces, particularly structural elements of buildings, preferably sheet metal elements, such as those made of reinforced aerated concrete, and the saw includes:

[0006] a) A first saw unit having a first saw cutting plane and a second saw unit having a second saw cutting plane.

[0007] b) Wherein, the two saw cutting planes cannot be adjusted (or arranged) to be parallel (or inclined) to each other.

[0008] c) Wherein the first saw unit and the second saw unit

[0009] c1) Both are installed on a common carrier device.

[0010] c2) In each case, the workpiece can be moved in or out of the carrier device independently of each other during the relevant feed motion, and in each case, via the relevant feed driver.

[0011] d) wherein at least the first saw unit is movable relative to the carrier device for positioning relative to the workpiece by means of a positioning actuator in a positioning motion independent of the feed motion.

[0012] e) In this embodiment, the carrier device, together with the two sawing units, can move relative to the workpiece in a working motion via a driver.

[0013] In another embodiment, the first saw unit includes a first circular saw blade having a first axis of rotation and a first rotary driver, the first rotary driver being used to rotate the first circular saw blade about the first axis of rotation, wherein the first saw cutting plane is defined by the first circular saw blade and is oriented perpendicular to the first axis of rotation.

[0014] In another embodiment, the second saw unit includes a second circular saw blade having a second axis of rotation and a second rotary driver, the second rotary driver being used to rotate the second circular saw blade about the second axis of rotation, wherein the second saw cutting plane is defined by the second circular saw blade and is oriented perpendicular to the second axis of rotation.

[0015] In a preferred embodiment, the first rotary drive is arranged vertically above and / or orthogonal to the first rotation axis of the first circular saw blade, and is preferably connected to the hub of the first circular saw blade via a bevel gear.

[0016] In one embodiment, the second rotary drive is arranged horizontally and / or axially relative to the axis of rotation of the second circular saw blade, and is preferably axially directly coupled to the hub of the second circular saw blade, the hub of the second circular saw blade being preferably arranged to be recessed on the side opposite to the rotary drive.

[0017] The saw preferably has one or more of the following features:

[0018] a) The second saw unit can also be moved relative to the carrier device via a feed driver for positioning relative to the workpiece with a positioning motion independent of the feed motion.

[0019] b) The saw cutting plane is vertically adjustable or can be adjusted (or: arranged).

[0020] c) The saw cutting planes are adjustable or can be adjusted orthogonally to each other.

[0021] d) The feed motion of at least one, and preferably two, saw units is linearly and / or vertically adjustable, or is linearly and / or vertically adjustable.

[0022] e) The positioning motion of the saw unit is adjustable or can be adjusted linearly and / or horizontally.

[0023] f) The working motion of the carrier device is linearly and / or horizontally adjustable, or can be linearly and / or horizontally adjusted.

[0024] g) The working motion of the carrier device and the positioning motion of the saw unit are adjustable or can be adjusted orthogonally to each other.

[0025] Preferably, the carrier device includes a cantilever, preferably extending along a central axis, which is arranged or may be arranged above and / or suspended above the workpiece, wherein the saw unit is mounted on the cantilever. The central axis of the cantilever is preferably horizontally oriented. Positioning motion is preferably oriented parallel to the central axis of the cantilever. Feed motion is preferably oriented orthogonally to the central axis of the cantilever.

[0026] In certain embodiments, the cantilever is mounted to rotate (or pivot) about a rotation axis, preferably a vertical rotation axis, preferably a horizontal rotation, particularly for performing inclined or oblique cuts.

[0027] In another embodiment, a rotary drive mounted on the carrier device is assigned to one or two saw units for rotating the corresponding saw cutting plane relative to the carrier device (particularly the cantilever).

[0028] Preferably, for the feed motion, each saw unit is connected to a carriage via a carrier or retainer, the carriage being movably guided on or within a corresponding guide rail on the feed carrier (particularly a vertical carrier), and driven or actuated by a displacement actuator. The feed carriers of the two saw units are preferably arranged on opposite sides of the cantilever. For the positioning motion, preferably, the feed carrier of the first saw unit is displaceably guided in a positioning guide rail on the cantilever, and is driven or actuated by a feed actuator, the positioning guide rail preferably extending parallel to the central axis of the cantilever.

[0029] In an advantageous embodiment, the saw includes a support device for supporting the workpiece, the carrier device and the support device being movable relative to each other during working motion, at least one drive preferably being associated with the carrier device or the support device, and the support device preferably having a guide rail for guiding the carrier device during working motion.

[0030] In a particularly advantageous embodiment, the support device has a plurality of support elements that can be folded upward and downward by a folding drive, so as to clear the cut portion of the workpiece by folding down a selected support element (in the folded-up state of the selected support element, the cut portion rests at least partially on the selected support element) and releasing the corresponding cut portion. The foldable support elements are preferably arranged one after another in a row and are used to support the edge region of the workpiece. A machining slot is preferably formed between at least a portion of the foldable support elements in the folded-up position and other support elements, the machining slot for the circular saw blade to engage with during the sawing step.

[0031] Generally, a sawing machine also includes at least one control device, which is operatively connected or communicates with all drives and automatically produces the saw cut to be produced for processing the workpiece by means of implemented software or NC control (numerical control) and predetermined geometric setpoint data.

[0032] A method for sawing a workpiece using a saw according to embodiments of the present invention, the workpiece being particularly a structural element for buildings, preferably a sheet metal element, for example made of reinforced aerated concrete, includes the following method steps in one embodiment:

[0033] (i) A first cut is made by a second circular saw blade that completely penetrates the thickness of the workpiece. The second circular saw blade is set to working rotation by a associated second rotary drive and is either in a feed position or has been moved to a feed position by a feed motion, preferably a vertical feed motion. In the feed position, the second circular saw blade reaches the workpiece, preferably from above, over its entire thickness, with its area facing the workpiece, preferably the lower area. The second circular saw blade moves through the workpiece from the edge of the workpiece by means of the working motion of the carrier device.

[0034] (ii) A second cut is made by a first circular saw blade that completely penetrates the thickness of the workpiece. The first circular saw blade is set to working rotation by a related first rotary drive and has been moved to a position at the edge of the workpiece by a positioning motion, and the second cut is made by a feed motion only.

[0035] Furthermore, according to the present invention, a method for sawing a workpiece, particularly for structural elements of buildings, preferably sheet metal elements, such as those made of reinforced aerated concrete, wherein internal corner regions are created in the workpiece, the method comprising the following steps:

[0036] (i) In the first sawing step, a first saw cut is created in the workpiece by a circular saw blade, wherein the first saw cut extends from the edge of the workpiece to an end region still within the workpiece and extends through the entire depth of the workpiece, and wherein a curved inner edge of the cut is retained in the end region, the curved inner edge of the cut depending on the outer profile of the circular saw blade and the feed or outward movement of the circular saw blade.

[0037] (ii) In the second sawing step, a second saw cut is created in the workpiece, the second saw cut starting from the edge of the workpiece and extending to the first saw cut in a region spaced apart from the end of the first saw cut.

[0038] (iii) In the first cleaning step, the portion of the workpiece cut off by the first saw cut and the second saw cut is removed.

[0039] (iv) In the third sawing step, using the same circular saw blade as in the first sawing step, a third sawing kerf is created in the end region of the first sawing kerf, passing through the entire depth of the workpiece, as a re-cut or release kerf of the first sawing kerf, whereby the inner edge of the kerf is completely removed, and the inner edge of the third sawing kerf is formed at the end region of the first sawing kerf that has been supplemented or reprocessed by the third sawing kerf, preferably a straight inner edge.

[0040] (v) In the fourth sawing step, a fourth saw cut is made in the workpiece, the fourth saw cut extending from the edge of the workpiece to the inner edge at the third saw cut.

[0041] (vi) In the second cleaning step, the portion of the workpiece separated by the first saw cut released from the inner edge of the cut in the end region of the fourth saw cut and the first saw cut released from the inner edge of the cut in the end region of the first saw cut, or separated by the fourth saw cut and the third saw cut, is removed, thereby forming an inner corner region formed by the first saw surface released from the first saw cut and the third saw surface released from the third saw cut and the inner edge at the third saw cut.

[0042] This method for generating internal corner areas is preferably implemented using a saw according to an embodiment of the invention. Preferably, the first saw cut in the first sawing step and the third saw cut in the third sawing step are generated by a second circular saw blade, preferably by the working movement of the carrier device. Furthermore, the second saw cut in the second sawing step and the fourth saw cut in the fourth sawing step are preferably generated by a first circular saw blade, preferably by feed movement only and not by the movement of the carrier device.

[0043] In the first cleaning step, the portion of the workpiece at least partially resting on the at least one support element, separated by a first and second saw cut, is advantageously removed by folding down at least one support element. Preferably, in the second cleaning step, the portion of the workpiece at least partially resting on the at least one additional support element, separated by a first saw cut and released from the inner edge of the cut in the end region of the first saw cut through a fourth saw cut and a third saw cut, is removed by folding down at least one additional support element.

[0044] The invention is further explained below through examples of embodiments. Reference is also made to the accompanying drawings, in which…

[0045] Figure 1 This is a perspective view of a saw with sheet metal components.

[0046] Figure 2 yes Figure 1 A side view of the saw.

[0047] Figure 3 It is based on Figure 1 and Figure 2 A top view of the saw.

[0048] Figure 4 A portion of a sheet metal element after being sawn longitudinally is shown in perspective view.

[0049] Figure 5 A portion of the saw is shown in perspective during the first transverse cut.

[0050] Figure 6 A portion of the sheet metal element is shown in perspective after the first transverse section has been sawn.

[0051] Figure 7 A portion of the saw is shown in perspective during the subsequent longitudinal release cut.

[0052] Figure 8 This is a perspective view showing a portion of a sheet metal element after a longitudinal release cut has been made.

[0053] Figure 9 A portion of the saw is shown in perspective during the process of making the second transverse slit.

[0054] Figure 10 A portion of the sheet metal element after the second transverse section has been sawn is shown in perspective view;

[0055] Figure 11A portion of a sheet metal element is shown in perspective after the second transverse slit has been cut and the waste material discharged. This portion of the sheet metal element has a final L-shaped cut.

[0056] Figure 12 This is a perspective view of a saw, showing the final sawn sheet metal element with an L-shaped cut, and the saw in a stopped position.

[0057] Each case is illustrated schematically. Figures 1 to 12 In the text, the corresponding parts and dimensions are marked with the same reference symbols.

[0058] exist Figures 1 to 12 In this context, a Cartesian xyz coordinate system is input, serving as the spatial reference for the component and its motion. The x and y axes traverse the horizontal plane, while the z axis corresponds to the vertical direction.

[0059] according to Figures 1 to 5 The saw is configured for sawing (or: sawing process, producing a saw kerf, cutting to a certain size) workpieces, particularly sheet metal elements 5 (or: sheet metal, planar element, slab). Sheet metal elements 5 are particularly provided as building elements for constructing buildings or houses, particularly as wall elements or ceiling elements, and preferably, and without limitation, generally, are reinforced (or strengthened), particularly steel-reinforced (or: steel-strengthened) aerated concrete elements.

[0060] The sheet metal element 5 is placed on a table or frame-like support device 3. The free upper surface or top side of the laid sheet metal element 5 is marked 57. For the sheet metal element 5, the support device 3 specifically includes continuous support elements 36, and support elements 31, 32, 33 and 34, as well as wear-resistant pads 30. By means of a folding actuator (not shown in more detail), the support elements 31, 32, 33 and 34 can be folded up and down, and preferably arranged one after another in the x-direction.

[0061] To position or readjust the plate element 5 in the xy plane on the support device 3, a slider or positioning unit with adjustable stops is provided, wherein a positioning unit 70 for positioning or readjustment in the y direction is shown, and a positioning stop 37, on the end face 58 of the plate element 5 (not shown), for positioning or readjustment in the x direction. Typically, at least two positioning stops and units in opposite x and -x directions, and at least two, preferably at least four, positioning stops and units in opposite y and -y directions are provided on the side 59 of the plate element 5.

[0062] Specifically, the sheet element 5 can be an aerated concrete element, typically reinforced with steel fasteners. However, in principle, the saw can also be used to saw other workpieces with similar requirements. Measured here along the x-direction, the length of the sheet element 5 is typically 2 m to 8 m, for example 6 m; the width along the y-direction is typically 0.3 m to 1 m, for example 0.60 m; and the thickness, indicated by t, corresponds to the desired wall thickness, for example, approximately 0.1 m to 0.6 m. The end face forming the edge of the sheet element 5 is indicated by 58, the side face by 59, and the top face by 57.

[0063] The saw is used to produce various saw cuts that may occur in building construction, preferably straight transverse cuts for height cuts or L-shaped cuts, but also for bevel cuts such as gable cuts or bevel cuts, and for displacement cuts, if necessary. Assembly components (with steps and / or bevels and / or bevels and / or displacement cuts) are produced from sheet metal or sheet metal elements 5 having predetermined, for example, substantially rectangular sheet metal shapes, by means of sawing processes. For this purpose, the saw should receive specifications for the number and shape of individual assembly components, particularly through componentization software or manufacturing software, and accordingly calculate and execute motion control of saw blades 10 and 20. Dimensional accuracy should be as high as possible, i.e., the motion tolerance of the saw unit should be as small as possible.

[0064] The saw includes (at least) two circular saw blades 10 and 20. Each circular saw blade 10 and 20 defines a saw cutting plane and is arranged in the saw cutting plane so as to be rotatable about rotation axes D1 and D2, respectively, and driven by associated rotary drives 11 and 21 in associated rotational or turning motions or directions via output shafts (which are respectively fastened to associated hubs (with fastening flanges) 19 and 29 at the center of the circular saw blades 10 and 20, respectively).

[0065] Circular saw blades 10 and 20 are designed to cut or divide an outer contour, and as saw structures with a basic shape, this basic shape essentially follows a circle or extends around a rotation axis D1 or D2 with a constant radius R1 or R2. The circumferential speeds corresponding to R1 2πf1 or R2 2πf2 at speeds f1 and f2 are typically between 30 m / s and 80 m / s.

[0066] On the machining surfaces of circular saw blades 10 and 20, the maximum free radii of the annular regions available for sawing operations are denoted by ΔR1 and ΔR2, respectively. In the case of the first circular saw blade 10, these specifically correspond to the distance from the central hub 19 to the outer contour, or in the case of the second circular saw blade 20, specifically to the distance by which the rotary drive 21 extends further than the hub 29. The two free radii ΔR1 and ΔR2 are preferably selected to be greater than the thickness t of the sheet metal element 5, thereby allowing for continuous kerfs to be produced through the sheet metal element 5, and enabling the complete removal of sub-regions of the sheet metal element 5.

[0067] Preferably, the hub 29 on the second circular saw blade 20 is recessed, countersunk, or flush on the processing side away from the rotary drive 21, that is, it does not protrude outward, so that it does not create an obstacle to the sawing operation on that processing side.

[0068] The circular saw blades 10 and 20 are specifically designed as cutting discs having hard material particles, such as corundum or diamond, bonded to a metal matrix, preferably in the form of segments, but may also have a serrated structure on the outer contour.

[0069] The radii of the circular saw blades 10 and 20, i.e., the distance between their outer contours and their respective axes of rotation D1 or D2, are selected to be greater than the thickness of the sheet metal element 5 to be sawed through, making it possible to process only from one side of the sheet metal element 5.

[0070] exist Figures 1 to 5 As shown, the circular saw blades 10 and 20 and their cutting planes are vertically aligned (i.e., including the direction parallel to the z-axis), such that the rotation axes D1 and D2 are horizontally aligned or parallel to the xy-plane. Furthermore, the circular saw blades 10 and 20 and their rotation axes D1 and D2 are set orthogonal to each other, i.e., at right angles. Therefore, it is possible to initially perform longitudinal cuts in the xz-plane and transverse cuts in the yz-plane.

[0071] Preferably, the rotary drive 11 is arranged vertically, with its output shaft perpendicular to the rotation axis D1 and oriented in the z-direction, and is connected to the drive shaft of the circular saw blade 10 via gears (particularly bevel gears). Thus, together with the short carrier 13, a compact and space-saving first saw unit 14 is formed by the circular saw blade 10 and the rotary drive 11. The rotary drive 21 is preferably horizontal, with its output shaft oriented axially relative to the rotation axis D2, directly forming the drive shaft of the circular saw blade 20 as a direct drive. The carrier 23 is designed here as an approximately long arm or cantilever.

[0072] The first saw unit 14, including a first circular saw blade 10 and a rotary actuator 11, can be vertically displaced or linearly displaced in the displacement direction V1 along the z-direction. For this purpose, the first saw unit 14 is connected to a linear actuator 12 via a carrier 13, which is displaceably driven along the displacement direction V1 on or within a corresponding guide rail 41 on the vertical carrier 15 via a displacement actuator (not described in more detail).

[0073] Therefore, the second saw unit 24, including the second circular saw blade 20 and the rotary driver 21, can move vertically or linearly in the displacement direction V2 along the z-direction independently of the first saw unit 14. For this purpose, the second saw unit 24 is connected to the linear driver 22 via the carrier 23, which is displaceably driven along the displacement direction V2 on or within the corresponding guide rails 42 on the vertical carrier 25 by a displacement driver or feed driver (not described in more detail).

[0074] Two vertical displacement movements, V1 and V2, are provided for feeding the circular saw blades 10 and 20 downwards (negative z-direction) into and into the plate element 5, and for moving the circular saw blades 10 and 20 upwards (positive z-direction) out of and away from the plate element 5. The linear displacement unit, with guide rails 41 and 42 and a displacement driver or feed driver, can be formed with very high precision and low tolerance.

[0075] Two vertical carriers 15 and 25 for the first sawing unit 14 and for the second sawing unit 24 are mounted or formed on opposite sides of the elongated cantilever 40. The cantilever 40 hangs or rests above the sheet metal element 5 across the width of the sheet metal element 5 in the y-direction and is part of the carrier device 4.

[0076] As a further degree of freedom of motion, the carrier device 4 is guided to make a linear longitudinal movement L in the x-direction within the linear guide rail 74 on the support device 3, and can be moved by a linear actuator (not shown in more detail). As a result, the second saw unit 24 having the second circular saw blade 20 (and thus the first saw unit 14 having the first circular saw blade 10, the first saw unit 14 being connected to the second saw unit 24 via the cantilever 40) can move longitudinally along the longitudinal direction of the sheet metal element 5 with a longitudinal movement L, and can produce a longitudinal saw cut in the x-direction.

[0077] In the support device 3, particularly between the foldable support elements 31 to 34 on one side and the continuous support element 36 on the other side, at least one processing slot (or: insertion slot) 38 is arranged and formed through which a circular saw blade can be inserted downward during the sawing operation. In the illustrated embodiment example, the processing slot 38 is arranged at a fixed y-position or parallel to the longitudinal direction or moving L, and is configured for a second circular saw blade 20 that sinks into the processing slot 38 when producing a longitudinal kerf (in the y-direction) so as to be able to saw through the entire thickness t of the sheet metal element 5.

[0078] To introduce further degrees of freedom for adjusting the saw cutting plane, the cantilever 40 can be designed as a rotary cantilever, which is connected to the rotary rim 43, for example, via rib 47. The rotary rim 43 and the rotary cantilever 40 attached thereto can be rotated by a rotary actuator 44 about a vertical or z-axis of rotation SA with a rotary motion SB, and thus parallel to the xy plane with a rotary motion SB. The (rotary) cantilever 40, the rotary rim 43, and the rotary actuator 44 now together form a rotary carrier device 4 for rotating the two circular saw blades 10 and 20 and their saw cutting planes by a certain rotation angle in a horizontal rotary plane parallel to the xy plane, according to the rotary motion SB.

[0079] The bearings of the carrier device 4 can be designed with very high precision and low tolerance because the rotational motion SB is only one-dimensional or has only one degree of freedom.

[0080] Depending on the rotation position of the rotary cantilever 40, the first circular saw blade 10 can perform sawing cuts on the plate element 5 on a side different from the vertical cut along the y-direction, away from the rotation axis SA. That is, it can be as follows: Figure 1 As shown, the cutting is performed at an interior angle or oblique angle α of 90°, or the oblique cutting is performed at an interior angle or oblique angle α that deviates from 90° after the carrier device 4 rotates around the rotation axis SA by a certain rotation angle SB.

[0081] To allow for adaptation to different widths of the sheet metal element 5 or different positions of the saw cut in the y direction, the vertical carrier 15 (on which the first saw unit 14 is guided) together with its first circular saw blade 10 can be moved laterally T1 in a transverse guide rail 45 parallel to the central axis 46 of the cantilever 40 by a transverse drive (not shown in more detail).

[0082] The second circular saw blade 20 now makes longitudinal cuts or longitudinal saw cuts in the plate element 5 along the x direction.

[0083] The longitudinal cut through the plate element 5 in the x direction is preferably set at a predetermined y position, where the second circular saw blade 20 is positioned and the cantilever 40 extends vertically or in the y direction, and at this position, the processing slot 38 extending through in the x direction is located on one hand between the protruding support elements 31, 32, 33 and 34, and on the other hand between the support elements 36, and the second circular saw blade 20 can be inserted into the processing slot 38 in the z direction.

[0084] In order to enable sawing, particularly longitudinal sawing, to be performed at different positions of the second circular saw blade 20 in the y-direction or at different lateral positions, in an embodiment not shown, a lateral guide and a lateral drive may, in principle, be provided on this side of the cantilever 40 to move the vertical carrier 25 of the second circular saw blade 20 along the cantilever 40 or its longitudinal axis 46, particularly along the lateral movement T2 in the y-direction.

[0085] Furthermore, it is conceivable that the cantilever 40 can be displaced along its longitudinal axis 46 by a displacement actuator or linear actuator, not described in more detail, particularly relative to the swivel rim 43.

[0086] For the two circular saw blades 10 and 20, the drive and degrees of freedom achieved in this way allow for a wide variety of different machining cuts on the sheet metal element 5. The degrees of freedom for moving the two circular saw blades 10 and 20 within the intended workspace are achieved through simple linear drives and linear guides, which can be executed with very small backlash on one hand, and on the other hand, through rotary drives and rotary bearings. This increases machining accuracy and speed (response behavior). For example, compared to the implementation with two industrial robots, the larger design in the case of two industrial robots leads to greater stability, but also to higher inertia, resulting in longer cycle times.

[0087] More generally, according to the invention, a saw is provided having two circular saw blades, which are not arranged parallel to each other or cannot be adjusted to be parallel to each other, wherein the two circular saw blades are supported or mounted on a common carrier device, and wherein...

[0088] - A carrier device with two circular saw blades can be moved relative to a workpiece or support device by means of a driver in a first working motion. Preferably, the support device is fixed and the carrier device moves by means of an associated driver. Alternatively, in an alternative manner, the support device moves the workpiece by means of an associated driver (e.g., in the form of a conveyor belt), in which case the carrier device is stationary or fixed.

[0089] - At least one circular saw blade can move relative to the carrier device in a second working motion.

[0090] In each case, each of the two circular saw blades can be moved into or out of the workpiece relative to the carrier device via a feed drive.

[0091] - Optionally, the carrier device can rotate together with the two circular saw blades, and

[0092] - Optionally, at least one circular saw blade may rotate relative to the carrier device.

[0093] The two circular saw blades or their axes of rotation are preferably arranged or adjustable to be perpendicular to each other.

[0094] The first working motion of the carrier device can, in principle, follow any feasible trajectory of the circular saw blade, but a planar working motion, and preferably a linear motion, i.e., a straight-line motion or motion along a straight line, is preferred. One of the circular saw blades produces a kerf approximately during the first working motion, and for this purpose is adjusted or arranged relative to the carrier device such that the axis of rotation of the circular saw blade is oriented perpendicular to the trajectory, preferably perpendicular to the straight line of the first working motion of the carrier device. The first working motion is preferably used to produce a longitudinal or longitudinal kerf.

[0095] The generally arbitrary trajectory of the second working motion does not follow the same trajectory as the first working motion, but in particular, it also lies in a plane, and preferably, as a linear motion, it follows a straight line, which is preferably oriented at an angle to the plane or straight line of the first working motion, preferably 90°, i.e., orthogonal to the plane or straight line of the first working motion. The second working motion is mainly used to position the corresponding circular saw blade relative to the workpiece, but it can also be used to make saw cuts in the workpiece during the second working motion of the circular saw blade.

[0096] Specifically, the feed motion of each circular saw blade is a linear motion along a straight line, which is preferably oriented perpendicular to the trajectory, plane, or line of the first working motion and / or perpendicular to the trajectory, plane, or line of the second working motion. The feed motion is preferably also used to create a saw cut in the workpiece during the feed motion. For example, a transverse cut can be created to form internal corner areas, particularly L-shaped cuts, together with a longitudinal cut.

[0097] The optional rotary motion of the carrier device together with the two circular saw blades is used, for example, to produce a beveled cut.

[0098] The selectable rotational angles or settings of the circular saw blade are preferably used to produce inclined cuts, such as bevel cuts or displacement cuts.

[0099] The sawing system also includes a control device (not shown) that is connected or communicates with all the drivers mentioned via wired or wireless control technology and automatically executes the saw cuts to be produced based on the implemented software or NC control and predetermined geometric data (e.g., position, orientation, and angle) to produce a special pattern for the workpiece (particularly sheet metal elements).

[0100] Using a saw, a large number of sawing operations and sawing operation sequences on the same workpiece can be performed in a very variety of ways.

[0101] refer to Figures 1 to 12 A particularly advantageous machining process that can be performed using a sawing system will now be presented, which is configured to create an internal corner region on or in a sheet metal element 5 (as an example of a general workpiece). In the internal corner region, two flat cut surfaces intersect at the inner edge. In particular, the internal corner region is intended to be a rectangular or angular internal corner region or an L-shaped portion, the L-shaped portion being formed by a longitudinal cut surface 51 and a transverse cut surface 54 intersecting at the inner edge 56. The motion sequence described herein is preferably stored in software in a control device and is realized by controlling the corresponding responsible drive in each working step.

[0102] First, in the positioning step, the still intact cuboid plate element (or: flat element, plate, blank) 5 is placed on the support device 3, and its position is adjusted or centered by the positioning units 37 and 70. The plate element 5 is positioned such that the y-position of the longitudinal cut S1 to be produced in the plate element 5 is exactly above the processing slot 38 of the support device 3.

[0103] Now, with the circular saw blades 10 and 20 raised, the carrier device 4 (on which two saw units 14 and 24 are positioned) moves longitudinally L to its initial position at the end of the plate element 5, so that they present approximately as Figure 12 The position is shown. The second circular saw blade 20 is now located at the end face 58 of the plate element 5 relative to the x position, and is still above the plate element 5. The second circular saw blade 20 has been laterally advanced to the correct y position above the machining slot 38.

[0104] In the initial position, the foldable support elements 31 to 34 are initially all folded upwards and together with the support element 36, support the plate element 5 (not shown) positioned below.

[0105] Now, in the first sawing step for generating the longitudinal cut S1, the second circular saw blade 20 (already in working rotation by the rotary drive 21) moves downward through the sheet metal element 5 in the -z direction with a vertical displacement V2 via the vertical carrier 25 for the second saw unit 24, descending to its full depth t, and the lower edge region sinks into the processing slot 38. The descent depth of the second circular saw blade 20 in the -z direction is less than the free radius ΔR2, such that the rotary drive 21 remains above the sheet metal element 5. Simultaneously, the descending second circular saw blade 20 is guided by the longitudinal movement L in the -x direction of the carrier device 4 to pass through the sheet metal element 5 starting from the end face 58. This generates a continuous longitudinal cut S1 in the sheet metal element 5 along the processing slot 38 in the -x direction, the width of which corresponds to the width (or thickness) of the second circular saw blade 20.

[0106] When the second circular saw blade 20 finishes its longitudinal movement L in the x-direction with a predetermined length, it is again pulled upward or guided out of the plate element 5 in the z-direction, i.e., the longitudinal cut S1 ends, because the second circular saw blade 20 stops its longitudinal movement L and now moves upward again with displacement movement V2 and extends out of the plate element 5. The first sawing step is thus completed.

[0107] exist Figure 4 A portion of the sheet metal element 5 is shown, having a longitudinal cut S1 after the first sawing step. The longitudinal cut S1 terminates within the sheet metal element 5 at an end region. Due to the geometry of the circular saw blade 20, an unsawed remaining area, or cutting edge 53, remains in the end region of the longitudinal cut S1, having the thickness of the second circular saw blade 20 or the width of the first cut S1. The shape of this cutting edge 53 is generally arc-shaped or crescent-shaped, and depends not only on the radius R2 of the second circular saw blade 20 but also on its outward movement in the z-direction at the end of the first sawing step. However, since the maximum penetration depth of the second circular saw blade 20's free radius ΔR2 during the first sawing step is limited, the cutting edge 53 is unavoidable.

[0108] On one longitudinal side, a sub-region, denoted A1, is cut off by a first saw cut, longitudinal cut S1, and subsequently divided in a second sawing step. This sub-region has a width e in the y-direction and corresponds to the distance of the longitudinal saw cut S1 from the side 59 of the sheet metal element 5, and also to the thickness t of the sheet metal element 5. On the side opposite to the sub-region A1 of the sheet metal element 5 that does not retain sub-region A1, the longitudinal cut surface 51 is now formed as the first cut surface; however, this first cut surface ends unevenly at the cut edge 53 and does not end with a straight edge as desired.

[0109] In order to completely cut off the sub-region A1 and remove the cutting edge 53 at the same time, three further sawing steps are now provided according to the present invention.

[0110] In the second sawing step, a first transverse saw cut S2 is first created as a second saw cut at a distance d. The distance d is measured in the x-direction, the longitudinal movement direction L, or the direction of the longitudinal saw cut S1, starting from the end region of the longitudinal saw cut S1 or also from the farthest point of the cutting edge 53. The first transverse saw cut S2 extends from the side 59 of the sheet metal element 5 to the longitudinal cut S1 or also to the longitudinal cut surface 51.

[0111] To create the first transverse cut S2, a first circular saw blade 10 is preferably used, such as... Figure 5 As shown. Therefore, after the first sawing step, the carrier device 4 and the two saw units 14 and 24 are again moved backward a short distance in the x-direction by a longitudinal movement L until the first circular saw blade 10 is located at a distance d from the end region of the longitudinal cut S1 or the farthest point of the cutting edge 53, with the rotation axis D1 oriented in the x-direction. The first circular saw blade 10 is moved, or has been moved in advance, by a lateral movement T1 in the y-direction such that its outer contour in the y-direction terminates at the longitudinal cut S1, preferably at the longitudinal cut surface 51, such that the first rotation axis D1 is arranged at a distance from the plane containing the longitudinal cut surface 51 equal to the radius R1 of the first circular saw blade 10.

[0112] The first transverse cut S2, serving as the second saw cut, is now preferably formed by the fully vertical working motion of the first circular saw blade 10, which moves downward through the plate element 5 with a vertical displacement motion V1. For this purpose, the free radius ΔR1 of the first circular saw blade 10 is greater than the width e of the sub-region A1, which corresponds to the distance of the first saw cut or longitudinal cut S1 from the side 59. The vertical arrangement of the rotary drive 11 above the rotation axis D1 of the first circular saw blade 10 also facilitates this vertical motion of the first circular saw blade 10.

[0113] After the first transverse cut T1, subregion A1 is now exposed, and its surroundings have been cut away, allowing it to be removed or cleared. This is in Figure 6 As shown in the figure. After the transverse cut S2 is cut off, the first transverse cut surface 52 is now opposite to the sub-region A1 divided by the transverse cut S2.

[0114] Now, in the first cleaning step, the cleaning is carried out in an advantageous manner by means of the foldable support elements. As the foldable support elements 32 to 34 are folded downward by the folding driver, the support of the portion A1 of the plate element 5, which is now completely divided, is removed, and the divided portion A1 falls due to gravity and can be removed immediately or later.

[0115] This clearing of sub-region A1 creates space for the next third sawing step. The third sawing step occurs after the first clearing step and is used to completely remove the cutting edges 53 left in the end region of the longitudinal cut S1 in the first sawing step. In the third sawing step, the longitudinal cut S1 may maintain its (maximum) length or may be slightly extended.

[0116] In the third sawing step, the second circular saw blade 20 is now preferably used again, such as... Figure 7 As shown. Therefore, after the first sawing step, the carrier device 4, together with the two saw units 14 and 24, moves slightly along the -x direction in a longitudinal movement L until the second circular saw blade 20 is positioned above the cutting edge 53. In this case, the x-position of the second circular saw blade 20 is preferably in the x-direction, set such that the outer contour of the second circular saw blade 20, projected downwards along the z-direction, terminates at the end of the longitudinal cut S1, i.e., at a distance d from the first transverse cut surface 52, or may slightly exceed this distance. For the positioning movement, the control device correspondingly controls the longitudinal drive.

[0117] In the third sawing step, the second circular saw blade 20 moves vertically downwards only in the first sawing kerf or longitudinal cut S1 and cuts off the cutting edge 53 over the entire thickness t of the sheet metal element 5, creating a third sawing kerf as a secondary cut S3 of the longitudinal cut S1. This creates a clean vertical end surface or end edge on the longitudinal cut S1, ultimately forming an inner edge 56 on the longitudinal cut surface 51 of the secondary cut. This vertical downward movement of the second circular saw blade 20 can now be performed further than in the first sawing step because a release workspace has now been created by processing sub-region A1 and folding down the support elements (specifically support element 32). The driver 21 can now move freely downwards in this release workspace with displacement movement V2 and is no longer in close contact with the sheet metal element 5 or support element 32. A recessed hub 29 is arranged on the processing side of the second circular saw blade 20 facing the longitudinal cut surface 51, which can also move across the longitudinal cut surface 51 or surface.

[0118] The result of the third sawing step is as follows: Figure 8 As shown. In Figure 8 In the illustration, the volume covered by the double cut S3 and the material cut out or removed, now cleaned, of the sheet metal element 5 is shown in shaded areas. The cutting edge 53 from the first sawing step is now completely removed.

[0119] It can also be seen that the free radius △R2 of the second circular saw blade 20 must not only be greater than the thickness t of the plate element 5, but also greater than the distance d, in order to allow the formation of a third saw cut or a double cut S3.

[0120] Now proceed with the fourth sawing step and the subsequent second cleaning step to complete the inner corner area.

[0121] In the fourth sawing step, such as Figure 9 As shown, the first circular saw blade 10 is inserted and positioned again in the same manner as in the second sawing step, but now it is offset by a distance d from the first transverse cut surface 52 in the -x direction. Therefore, after the third sawing step, the carrier device 4, together with the two saw units 14 and 24, moves backward slightly in the x direction with a longitudinal movement L until the first circular saw blade 10 is spaced apart from the first transverse cut surface 52 by a distance d. The first circular saw blade 10 is repositioned or held in position by a transverse movement T1 in the y direction such that the outer contour terminates precisely in the y direction of the longitudinal cut S1 and its secondary cut S3 at the end edge generated in the third sawing step, preferably at the inner edge 56 of the longitudinal cut surface 51, because the first axis of rotation D1 is arranged at a distance from the plane containing the longitudinal cut surface 51 equal to the radius R1 of the first circular saw blade 10.

[0122] Similar to the second sawing step, the fourth saw cut or the second transverse cut S4 in the fourth sawing step is also generated solely by the vertical displacement movement V1 of the first circular saw blade 10.

[0123] The result of the fourth sawing step is shown in the figure. Figure 10 In the middle, a cut-off portion A2 is formed, which is cut off from all sides and is defined by a third saw cut S3 and a fourth saw cut S4, as well as a side surface 59 and a first transverse cut surface 52. A second transverse cut surface 54 is now formed on the remaining sheet metal element 5 at the fourth saw cut S4, which separates the second transverse cut surface 54 from portion A2, and the second transverse cut surface 54 is opposite to portion A2.

[0124] In the second clearing step, the segmented portion A2 is processed at this time. Still due to the downward folding of the support element 32, this clearing occurs automatically, as the segmented portion A2 falls down due to gravity.

[0125] The final result after removing part of A2 is as follows Figure 11 As shown. The final internal corner region is formed in the sheet element 5, which has two sides, a longitudinal cut surface 51 and a second transverse cut surface 54, the two sides intersecting at right angles at a regular inner edge 56.

[0126] Now, as Figure 12As shown, the entire unit, including the carrier device 4 and the two sawing units 14 and 24, is moved back to the front end of the end face 59 of the sheet metal element 5, and the final sheet metal element 5 with the internal corner region can be removed from the support device 3 or further processed. The length of the L-shaped cut or longitudinal cut surface 51 in the L direction is represented by f.

[0127] In the illustrated embodiment, during the four sawing steps, the carrier device 4 and its cantilever 40 remain in a non-tilted state, i.e., the central axis 46 of the cantilever 40 remains oriented in the y direction, and the interior angle or bevel α is set to 90°.

[0128] However, the first circular saw blade 10 can also produce an inclined transverse cut 52, such as a bevel cut, by means of the pre-rotating carrier device 4.

[0129] In embodiments not shown, one or each of the circular saw blades 10 and 20 may also rotate relative to the z-axis or the horizontal xy-plane about their axes of rotation D1 and D2, preferably downwards, but possibly upwards. In particular, this can also produce displaced cuts or cuts with an inclined cutting surface (which is inclined at a certain rotation angle relative to the z-axis). The rotation angle can be fixed in a simple form, but is preferably variably adjustable within a range of rotation angles by a motorized rotary actuator (not shown) of the system controller.

[0130] The manufacturing of the internal corner region according to the invention is preferably carried out by a sawing device according to the invention.

[0131] However, the processing steps described for creating the internal corner area can also be implemented using other sawing devices. For example, each of the circular saw blades 10 and 20 can be mounted on and moved under the control of an associated industrial robot. Alternatively, all sawing steps can be performed using only a single circular saw blade attached to and guided in a controlled manner by the industrial robot. Furthermore, a band saw or chainsaw can be used instead of the first circular saw blade.

[0132] Reference tag list

[0133] 3 Support device

[0134] 4. Carrier device

[0135] 5. Sheet metal components

[0136] 10 Circular Saw Blades

[0137] 11 Rotary Driver

[0138] 12 Linear Drivers

[0139] 13 Carriers

[0140] 14 First Saw Unit

[0141] 15 Vertical carrier

[0142] 19 hubs

[0143] 20 Circular Saw Blade

[0144] 21 Rotary Driver

[0145] 22 Linear Drivers

[0146] 23 Carriers

[0147] 24 Second saw unit

[0148] 25 Vertical carrier

[0149] 29 hubs

[0150] 30 Abrasion-resistant pad

[0151] 31 to 34 Foldable support elements

[0152] 35 Machining clearance

[0153] 36 Supporting elements

[0154] 37. Positioning stop

[0155] 38. Machining narrow slots

[0156] 40 cantilever

[0157] 41, 42 guide rails

[0158] 43. The rim of the wheel of revolving motion

[0159] 44 Rotary drive

[0160] 45 Horizontal guide rail

[0161] 46. ​​Central axis

[0162] 47 Linear Guide Rail

[0163] 51 Longitudinal cut surface

[0164] 52. Surface of transverse cut

[0165] 53 Cutting edges

[0166] 54. Surface of transverse cut

[0167] 55 Release the incision

[0168] 56 Inner edge

[0169] 57 Top surface

[0170] 58 end face

[0171] 59 Side View

[0172] 70 positioning units

[0173] 74 Linear Guide Rails

[0174] D Thickness

[0175] E width

[0176] F length

[0177] Cartesian coordinates (x, y, z)

[0178] Subpartitions split by A1 and A2

[0179] Rotation axes D1 and D2

[0180] L longitudinal movement

[0181] S1, S2, S3 saw cuts

[0182] SA Rotary Axis

[0183] SB Rotational Motion

[0184] Radius R1, R2

[0185] Free radii of △R1 and △R2

[0186] Lateral movement of T1 and T2

[0187] V1, V2 displacement motion, feed motion

[0188] α interior angle.

Claims

1. A saw for sawing workpieces, the saw comprising: a) A first saw unit (14) having a first saw cutting plane and a second saw unit (24) having a second saw cutting plane. b) Where the two saw cutting planes are not adjusted to be parallel to each other or cannot be adjusted to be parallel to each other. c) Wherein, the first saw unit (14) and the second saw unit (24): c1) Both are installed on the common carrier device (4), c2) In each case, the workpiece can be moved into or out of the carrier device (4) with associated feed movements (V1, V2) independently of each other, and in each case, it is driven by associated feed drivers. d) wherein at least the first saw unit (14) is movable relative to the carrier device (4) for positioning relative to the workpiece by a positioning driver in a positioning motion independent of the feed motion. e) wherein the carrier device (4), together with the two sawing units (14, 24), is capable of moving relative to the workpiece in a working motion via a driver. f) Wherein, the saw also includes a support device (3) for supporting the workpiece, wherein the carrier device and the support device are movable relative to each other during the working motion. g) wherein the support device (3) includes a plurality of support elements (31, 32, 33 and 34) which are foldable upward and downward by a folding driver so as to remove the cut portion of the workpiece by folding down the selected support element and placing the corresponding cut portion, wherein in the upward folded state of the selected support element, the cut portion rests at least partially on the selected support element.

2. The sawing machine according to claim 1, in, The first saw unit (14) includes a first circular saw blade (10) having a first axis of rotation (D1) and a first rotary driver (11) for rotating the first circular saw blade (10) about the first axis of rotation (D1). The first saw cutting plane is defined by the first circular saw blade (10) and is oriented perpendicular to the first axis of rotation (D1). And / or The second saw unit (24) includes a second circular saw blade (20) having a second axis of rotation (D2) and a second rotary driver (21) for rotating the second circular saw blade (20) about the second axis of rotation (D2). The second saw cutting plane is defined by the second circular saw blade (20) and is oriented perpendicular to the second axis of rotation (D2).

3. The sawing machine according to claim 2, wherein, The first rotary drive (11) is arranged vertically and is located above and / or orthogonal to the first rotation axis (D1) of the first circular saw blade (10), and is connected to the hub of the first circular saw blade (10) via a bevel gear, and / or The second rotary driver (21) is arranged horizontally and / or axially relative to the second rotation axis (D2) of the second circular saw blade (20), and is axially directly connected to the hub of the second circular saw blade (20), wherein the hub of the second circular saw blade is arranged to be recessed on the side opposite to the rotary driver.

4. The saw according to any one of claims 1-3, having one or more of the following characteristics: a) The second saw unit (24) can also be moved relative to the carrier device (4) by a positioning driver to position itself relative to the workpiece by a positioning motion independent of the feed motion. b) The saw cutting plane is vertically adjustable or can be vertically adjusted. c) The saw cutting planes are orthogonal to each other and adjustable, or are adjusted orthogonally to each other. d) The feed motion of at least one saw unit is linearly and / or vertically adjustable, or is linearly and / or vertically adjustable. e) The positioning motion of the saw unit is linearly and / or horizontally adjustable, or is linearly and / or horizontally adjustable. f) The working motion of the carrier device (4) is linearly and / or horizontally adjustable, or is linearly and / or horizontally adjustable. g) The working motion of the carrier device (4) and the positioning motion of the saw unit are orthogonal to each other and adjustable or orthogonal to each other.

5. The saw according to claim 4, wherein, The feed motion of the two saw units is linearly and / or vertically adjustable or is linearly and / or vertically adjustable.

6. The saw according to any one of claims 1-3, wherein, The carrier device (4) includes a cantilever (40) extending along a central axis (46) and arranged above and / or suspended above the workpiece, the saw unit being mounted on the cantilever (40). Furthermore, the central axis of the cantilever (40) is oriented horizontally, and / or, the positioning motion is oriented parallel to the central axis of the cantilever, and / or, the feed motion is oriented orthogonally to the central axis of the cantilever. The extended cantilever is mounted so that it can rotate horizontally about a vertical axis of rotation (SA) to perform inclined or bevel cuts.

7. The saw according to claim 6, wherein, At least one or each saw unit is provided with a rotary drive disposed on the carrier device for rotating the corresponding saw cutting plane relative to the carrier device.

8. The saw according to claim 7, wherein, The rotary drive is used to rotate the corresponding saw cutting plane relative to the cantilever.

9. The saw according to claim 6, wherein, For the feed motion, each saw unit (14) is connected to a carriage (12) via a carrier (13), the carriage (12) being displaceably guided on or within a corresponding guide rail (41) on the feed carrier and driven by a displacement actuator. The feed carriers of the two saw units are arranged on opposite sides of the cantilever (40). And / or In the positioning motion, the feed carrier of the first saw unit (14) can be displaced and guided on the cantilever and in the positioning guide rail, and is driven by the feed driver, the positioning guide rail extending parallel to the central axis of the cantilever.

10. The sawing machine according to claim 9, wherein, The feed carrier is a vertical carrier.

11. The saw according to any one of claims 1-3, wherein, At least one driver is associated with the carrier device or the support device, wherein the support device has a guide rail for guiding the carrier device during the working motion.

12. The sawing machine according to claim 11, wherein, The foldable support elements are arranged in rows one after another and serve as support for the edge region of the workpiece, and / or, at least a portion of the foldable support elements in the upward folded position and other support elements form a machining slot for use by the circular saw blade during the sawing step.

13. The sawing machine according to any one of claims 1-3 further includes at least one control device operatively connected or communicating with all drives, and automatically executing the saw cut to be produced for processing the workpiece by means of implemented software or NC control and predetermined geometric setpoint data.

14. The sawing machine according to claim 1, wherein, The workpiece is a structural element used in buildings.

15. The sawing machine according to claim 1, wherein, The workpiece is a sheet metal component.

16. The sawing machine according to claim 1, wherein, The workpiece is a sheet material component made of reinforced aerated concrete.

17. A method for sawing a workpiece, wherein, Using a saw according to any one of claims 1 to 16, In the method, (i) A first cut is made by a second circular saw blade (20) that completely penetrates the thickness of the workpiece. The second circular saw blade (20) is set to working rotation by a associated second rotary drive (21) and has been moved to a feed position by the feed motion. In the feed position, the second circular saw blade reaches the workpiece with its area facing the workpiece, passes through the entire thickness of the workpiece, and the second circular saw blade (20) moves through the workpiece from the edge (58) of the workpiece by means of the working motion of the carrier device (4). (ii) A second cut is made by a first circular saw blade (10) that completely penetrates the thickness of the workpiece, the first circular saw blade (10) being set to work rotation by a associated first rotary drive (11) and having been moved to a position at the edge of the workpiece by the positioning motion, and the second cut is made by the feed motion only.

18. The method according to claim 17, wherein, The second circular saw blade (20) moves to the feed position with a vertical feed motion.

19. The method of claim 17, wherein, At the feed position, the second circular saw blade reaches the workpiece with its lower region facing the workpiece, passing through the entire thickness of the workpiece.

20. The method of claim 17, wherein, In the feed position, the second circular saw blade reaches the workpiece from above with its area facing the workpiece, passing through the entire thickness of the workpiece.

21. A method for sawing a workpiece, wherein, An internal corner region is created in the workpiece, wherein a sawing machine according to any one of claims 1 to 16 is used, and the method comprises the following steps: (i) In a first sawing step, a first kerf is created in the workpiece by a circular saw blade, wherein the first kerf extends from the edge of the workpiece to an end region still within the workpiece and extends through the entire depth of the workpiece, and wherein a curved inner edge of the kerf is retained in the end region, the inner edge of the kerf depending on the outer contour of the circular saw blade and the feed motion of the circular saw blade. (ii) In the second sawing step, a second saw cut is created in the workpiece, the second saw cut starting from the edge of the workpiece and extending to the first saw cut in a region spaced apart from the end of the first saw cut. (iii) In the first cleaning step, the portion of the workpiece separated by the first saw cut and the second saw cut is removed (A1). (iv) In the third sawing step, using the same circular saw blade as in the first sawing step, a third sawing kerf is created in the end region of the first sawing kerf, extending through the entire depth of the workpiece, as a recutting or release kerf of the first sawing kerf. The inner edge of the kerf is completely removed, and the inner edge at the third sawing kerf is formed at the end region of the first sawing kerf that has been supplemented or reprocessed by the third sawing kerf. (v) In the fourth sawing step, a fourth saw cut is formed in the workpiece, the fourth saw cut extending from the edge of the workpiece to the inner edge at the third saw cut. (vi) In the second cleaning step, the portion of the workpiece divided by the fourth saw cut and the first saw cut released from the inner edge of the cut in the end region of the first saw cut (A2) is removed, thereby forming an inner corner region formed by the first saw surface released from the first saw cut and the third saw surface released from the third saw cut and the inner edge at the third saw cut.

22. The method according to claim 21, wherein, The inner edge at the third saw cut is a straight inner edge.

23. The method according to claim 21, wherein, The first saw cut in the first sawing step and the third saw cut in the third sawing step are generated by the working motion of the carrier device (4) using the second circular saw blade (20), and wherein the second saw cut in the second sawing step and the fourth saw cut in the fourth sawing step are generated by the first circular saw blade (10) only by the feed motion.

24. The method according to claim 21 or claim 23, wherein, in the first cleaning step, at least a portion (A1) of the workpiece resting on the at least one support element (33) and divided by the first saw cut and the second saw cut is removed by folding down at least one support element (33), and wherein, In the second cleaning step, the portion of the workpiece that is at least partially resting on the at least one additional support element (32) is removed by folding down at least one additional support element (32), which is separated by the fourth saw cut and the first saw cut released from the inner edge of the cut in the end region of the first saw cut through the third saw cut.

Images