Guide table for a band saw with a saw blade for sawing a workpiece and band saw with such a guide table

Abstract

The present invention relates to a guide table (101, 102) for a band saw (12) with a saw blade (24) for sawing a workpiece, comprising a base plate (16) with an upper side (18) and a lower side (20), a first guide groove (32) extending from the upper side (18), and a rotating device (56) with a first counter-guide section (58) and a stop (68) for the workpiece that is rotatable relative to the first counter-guide section (58), wherein the first counter-guide section (58) can be or is introduced into the first guide groove (32) for displacing the rotating device (56) along the same. The present invention also relates to a band saw (12) for sawing a workpiece, comprising such a guide table (101, 102).

Description

The present invention relates to a guide table for a band saw having a saw blade for sawing a workpiece, and to a band saw having such a guide table.Band saws are especially characterized in that a saw blade which is closed in a ring shape per se is guided around two rollers or wheels arranged at a distance from one another, wherein one(s) of the rollers or wheels is driven. The workpiece is placed on a support table which has a cutout through which the saw blade can be guided. This results in the circumstance that the course of the saw blade cannot usually be changed. The workpiece is usually plate-shaped, i.e. has a significantly greater extension in the longitudinal and width directions than in height. As such, the workpiece is sawed up in height, thereby providing the workpiece with the desired end faces which extend between the upper surface and the lower surface of the workpiece. Depending on the configuration, the support table can be rotated along an axis of rotation running perpendicular to the saw blade, so that the end faces to be produced do not necessarily have to run perpendicular to the upper and lower surfaces, but can enclose a specific angle with these surfaces. Surfaces that do not run perpendicular to one another are also referred to as mitering.Band saws are particularly suitable for the production of rectangular workpieces, but not polygonal workpieces in which the end faces do not meet perpendicularly.It is therefore the object of an embodiment of the present invention to propose a guide table with which it is possible with simple and cost-effective means to provide a remedy for the above-mentioned disadvantages and in particular to enable the precise machining of workpieces with a band saw, in which the end faces to be produced do not meet each other perpendicularly and / or do not run perpendicularly to the upper and lower surfaces of the workpiece. In particular, it should be possible to retrofit existing band saws with the guide table.Furthermore, an embodiment of the present invention is based on the object of specifying a band saw which can be operated with such a guide table.This object is achieved with the features specified in claims 1 and 18. Advantageous embodiments are the subject matter of the dependent claims.An embodiment of the invention relates to a guide table for a band saw having a saw blade for sawing a workpiece, comprisinga base plate having an upper side and a lower side,a first guide groove, in particular, starting from the upper side, anda rotating device having a first counter guide section and a stop for the workpiece that is rotatable relative to the first counter guide section, wherein the first counter guide section can be introduced or is introduced into the rotating device along the first guide groove in order to shift the rotating device.The guide table can be designed such that it can be fastened to the support table of the band saw. Not every support table of band saws is rotatably mounted. By means of the rotation device of the guide table according to the invention, the stop can be rotated relative to the saw blade in such a way that the end faces to be produced have the desired miter. In addition, the stop, against which the workpiece can be placed, can be displaced along the guide groove towards the saw blade, so that the rotation angle, once set, at which the workpiece is guided towards the saw blade is maintained.According to a further embodiment, the rotation device can be configured such that the stop can be rotated relative to the first counter-guide section about an axis of rotation running perpendicular to the upper side. As mentioned, the support tables of band saws are rotatable, if at all, about an axis which is perpendicular to the saw blade. In the initial position, the saw blade runs perpendicular to the support table. Starting from the horizontal starting position, the upper side of the guide table according to the invention likewise runs perpendicular to the saw blade.In this embodiment, the axis of rotation about which the stop can be rotated runs perpendicular to the surface and thus parallel to the saw blade with respect to the starting position of the support table of the band saw. The workpiece can thus be guided to the band saw in such a way that the end faces then produced meet at any angle and consequently have the desired miter. Consequently, polygons, for example three, five or hexagon, can be manufactured. Furthermore, quadrilaterals can be produced in the form of parallelograms, trapezoids or diamonds. If, in addition, the support table of the band saw is rotatable about an axis of rotation extending perpendicular to the saw blade, the end faces can also be provided with a specific angle of inclination with respect to their upper and lower surfaces, which angle of inclination does not extend perpendicular to the mentioned surfaces. The individual workpieces manufactured in this way can be assembled to form a three-dimensional structure such as a shell or a ball.In a further developed embodiment, the first counter-guide section and the first guide groove can have a shape complementary to one another. For example, the first guide groove can be constructed in the manner of a dovetail guide or in a C-shaped manner. The first counter-guide section can then be introduced laterally into the guide groove. It is thereby possible to prevent the first counter guide portion and consequently the rotating device from springing upward out of the first guide groove. The precision of the end faces to be produced is thus improved and the operational reliability is increased.In a further developed embodiment, the stop can be designed as a separate component and can be detachably connected to the rotating device. Various stops can be connected to the rotating device, which stops can be adapted to the workpieces to be machined. During the machining of the workpieces, it is not possible to prevent the stops themselves from coming into contact with the saw blade and consequently being sawn on. If the wear resulting therefrom has become too great, the relevant stop can be replaced by a new stop.In a further embodiment, the stop can have a first replaceable part which can be detachably connected to the stop. As mentioned, contact may occur between the stop and the saw blade during machining. In order not to have to replace the entire stop, in this embodiment a first changing part is provided which is arranged such that only this changing part can come into contact with the saw blade during the intended use of the guide table. If the wear is too great, the changing part can be replaced quickly without having to release the entire stop from the rotary unit.A further developed embodiment can be characterized in that the stop has a receiving section for receiving a contact piece for the workpiece. The workpiece can be placed against the abutment piece adjacent to the stop itself, whereby the workpiece can be guided at two or more than two positions, whereby the precision of the guidance and consequently of the end wall thus manufactured can be increased.According to a further embodiment, the contact piece can have a first contact surface and a second contact surface for the workpiece, which contact surface form a contact angle with respect to one another. If, for example, a hexagon is to be produced, the contact angle can likewise be 120°. In the case of a pentagonal corner, the contact angle is 108°, in the case of an octagon 135°, etc. The end faces already produced can then be placed against the first contact face and the second contact face, whereby the risk of the workpiece slipping during the machining is reduced and the precision of the machining is increased. In addition, the workpiece can be positioned very accurately.In a further embodiment, it can be advantageous for the contact piece to comprise a bearing plate for the workpiece, which optionally has a bearing plate cutout into which the saw blade of the band saw can be introduced or is introduced. In this embodiment, the workpiece can be applied to the support plate, which is moved together with the workpiece and the remaining stop relative to the saw blade. The workpiece consequently does not have to be slid over the upper side of the guide table, on which it could remain suspended or slip, for example, on chips or the like. The precision of the machining is consequently increased.According to a further embodiment, the second contact surface can be formed by a second replaceable part which can be detachably connected to the contact piece. The second changing part is arranged such that when contact occurs between the stop and the saw blade, contact takes place in the second changing part. If the wear has advanced too far, the second change part can be replaced and replaced by a new second change part.In a further developed embodiment, the bearing plate section can be formed by a third replaceable part which can be detachably connected to the bearing plate. For reasons of operational reliability, among other things, there is a desire to keep the contact plate cutout through which the saw blade passes as narrow as possible. In particular when the end faces are to be provided with an angle of inclination with respect to the upper and lower surfaces, the course of the bearing plate cutout must also be adapted to the angle of inclination in order to be able to keep the bearing plate cutout sufficiently narrow. A plurality of third changing parts can be provided, which are adapted to the common angles of inclination. Consequently, the stop can be quickly adjusted to the angle of inclination present. In addition, the third replaceable part can also be replaced quickly in the event of too high wear.In a further developed embodiment, the receiving section can have a second guide groove, into which a second counter-guide section can be introduced or is introduced for displacing the contact piece relative to the stop. As a result of a displacement, the distance, in particular of the first contact surface and / or of the second contact surface, from the saw blade can be varied, as a result of which workpieces of different sizes can be produced.In a further embodiment, the contact piece can have fastening means which interact with the second guide groove in order to fix the position of the contact piece relative to the stop. This prevents the contact piece from slipping relative to the stop, whereby the precision of production and the operational reliability are increased.A further developed embodiment can be characterized in that the contact piece comprises a fixing device for fixing the workpiece on the bearing plate. This also prevents the workpiece from slipping or lifting off during machining, thereby increasing the precision of manufacture and the operational reliability.According to a further embodiment, the base plate can have a base plate cutout, into which the saw blade of the band saw can be introduced or is introduced, wherein the base plate cutout is formed by a fourth replaceable part which can be detachably connected to the base plate. In this case, too, a plurality of fourth interchangeable parts can be held in stock, which are adapted to the common inclination angles. The base plate cutout can thus also be kept narrow when the angles of inclination change, which is advantageous in particular on account of operational reliability.In a further embodiment, it may be expedient for the guide table to have a rotary pin for rotatably guiding the workpiece. The workpiece may be provided with a hole corresponding to the pivot pin. During machining, the workpiece is rotated about the rotary pin, so that a circular disk can be produced. The outer surface of the circular disk can likewise be provided with an angle of inclination, so that truncated cones can also be produced.In a further embodiment, the rotary pin can be arranged on a bearing piece mounted displaceably relative to the base plate. With the displaceable bearing piece, the distance between the pivot pin and the saw blade can be varied, whereby circular disks with different diameters can be produced.A further embodiment may be characterized in that the guide table has a third guide groove, which extends from the upper side and into which a stopper piece can be inserted and fixed in a displaceable manner. As mentioned, the stop is moved towards the toothed side of the saw blade during the machining of the workpiece. The stopper piece can be used to prevent the saw blade from being pushed too far into the stop after the workpiece has been sawed through and from sawing on the stop there. The wear can thus be kept low.A further embodiment is characterized in that the base plate comprises two or more than two plate elements which are connected to one another. The composite plates can in particular be glued to one another. The panel elements can be designed as aluminum composite panels, plastic composite panels and plywood composite panels. Consequently, the base plate has a layered structure. In particular, it is thus possible to provide, for example, the first guide groove and the third guide groove by the uppermost plate element overlapping the underlying plate element. Cavities can be created into which profiles can be introduced to provide the first and third guide grooves. It is consequently not necessary for the base plate to be milled. The manufacture of the guide table can therefore be simplified. As mentioned, the plate elements can be screwed together. Consequently, differently dimensioned middle plate elements and differently dimensioned upper plate elements can be used in order to be able to react flexibly to specific features of the relevant band saw.One embodiment of the invention relates to a band saw for sawing a workpiece, comprising a guide table according to one of the preceding embodiments. The technical effects and advantages that can be achieved with the proposed band saw substantially correspond to those discussed for the present guide table. In summary, it should be pointed out that it is possible with simple means to retrofit an existing band saw and to produce end faces with the desired angles of inclination and end faces which meet at a specific angle.Exemplary embodiments of the invention are explained in more detail below with reference to the attached drawings. They show FIG. 1A shows a basic plan view of a guide table according to a first exemplary embodiment of the present invention, FIG. 1B is a sectional view taken along the sectional plane A-A defined in FIG. 1A, wherein the guide table is fastened to a band saw, FIG. 2A shows a basic plan view of a rotating device, FIG. 2B shows a basic plan view of a stop which can be releasably fastened by the rotation device, FIG. 2C is a side view of the stop shown in FIG. 2B, FIG. 3A shows a basic plan view of an abutment piece which can be releasably fastened to the stop shown in FIGS. 2B and 2C, FIG. 3B is a side view of the abutment piece shown in FIG. 3A; and FIG. 4 shows a sectional illustration through a second exemplary embodiment of a guide table according to the invention on the basis of the sectional plane A-A defined in FIG. 1A.FIG. 1A shows a basic plan view of a first exemplary embodiment of a guide table 101 according to the invention for a band saw 12, while FIG. 1B shows a sectional illustration through the guide table 101 shown in FIG. 1A along the sectional plane A-A defined in FIG. 1A. In FIG. 1B, however, the guide table 101 is fixed to a support table 14 of the band saw 12. The guide table 101 comprises a base plate 16 with an upper side 18 and an underside 20. In order that the base plate cutout 22 can be kept narrow, the base plate cutout 22 is arranged in a fourth changing part 26 which can in turn be inserted into a base plate groove 28 which is trapezoidal in cross section. The base plate cutout 22 merges into a likewise gap-shaped cutout 30 of the support table 14, which can be seen from FIG. 1B. The fourth change part 26 can be changed in the event of excessive wear.Furthermore, the base plate 16 comprises a first guide groove 32 which extends from the upper side 18 and terminates flush therewith. In addition, a third guide groove 34 is provided, which is designed identically to the first guide groove 32 and likewise extends from the upper side 18. It can be seen in FIG. 1A that a stopper piece 36 is slidable along the third guide groove 34 and can be fixed at a desired location. The function achieved thereby will be discussed in more detail later.Both the base plate cutout 22 and the first guide groove 32 and the third guide groove 34 run parallel to one another. The first guide groove 32 and the third guide groove 34 pass through the base plate 16 from the front edge 38 to the rear edge 40, while the base plate cutout 22 extends from the rear edge 40 and ends in the base plate 16.Furthermore, the guide table 101 comprises a rotary pin 42 onto which a workpiece is pushed if the workpiece is provided with a corresponding hole. The workpiece can then be rotated about the rotary pin 42 to produce a circular disk. The pivot pin 42 is arranged on a bearing piece 44 which is mounted displaceably in the base plate 16 but without projecting upwards beyond the upper side 18. For this purpose, a corresponding depression 43 is provided in the base plate 16 (see FIG. 1B ). The displacement axis extends perpendicular to the saw blade 24, so that as a result of a displacement of the bearing piece 44, the distance between the rotary pin 42 and the saw blade 24 can be varied in order to be able to produce circular disks with different diameters. In addition, the rotary pin 42 is not arranged centrally on the bearing piece 44, but eccentrically. Depending on whether circular disks with a smaller or larger diameter are to be produced, the bearing piece 44 can be inserted into the base plate 16 rotated by 180° about the axis of rotation of the pin. Once the pivot pin 42 has reached the desired distance from the saw blade 24, the bearing piece 44 can be fixed in the depression 43 by means of a fixing screw 46. The displacement axis along which the bearing piece 44 can be displaced extends perpendicular to the displacement axes defined by the first guide groove 32 and the third guide groove 34.Referring to FIG. 1B, the band saw 12 is shown in principle. The saw blade 24 is usually guided around two wheels or deflection rollers, not shown, of which at least one deflection roller is driven. For the sake of illustration, a separate drive unit 48 is shown here, with which the saw blade 24 can be driven.As mentioned, the band saw 12 further comprises a support table 14 which is intended to be rotatable about an axis of rotation (not shown) running perpendicular to the sectional plane of FIG. 1B, wherein the adjusting means required for this purpose are not shown.It can be seen that the guide table 101 can be fastened to the support table 14 by means of L-shaped fastening brackets 50 and by means of corresponding fixing screws 52. Furthermore, a positioning stop 54 is fastened to the guide table 101 in order to be able to define the position of the guide table 101 with respect to the support table 14.It can be seen that the saw blade 24 runs through both the guide table 101 within the base plate cutout 22 and the support table 14 within the cutout 30. In addition, in FIG. 1B, the cross-sectional shape of the first guide groove 32 and the third guide groove 34 and the base plate groove 28 can be seen.FIG. 2A shows a rotating device 56, which has a first counter-guide section 58, which is designed in the form of a guide rail, which has a shape complementary to the first guide groove 32 (cf. in particular FIG. 1A ). Consequently, the rotation means 56 can be slid along the first guide groove 32. As mentioned, the first guide groove 32 is designed identically to the third guide groove 34, so that it would also be possible to shift the rotation device 56 along the third guide groove 34.In addition, the rotating device 56 is equipped with a rotating plate 60 which is fastened to the counter guide section such that it can rotate about an axis of rotation D. The rotary plate 60 can be rotated by a certain angle of rotation about the axis of rotation D by means of a rotary lever 61. In addition, the rotary plate 60 is equipped with an angle scale 62 in order to facilitate the setting of the desired angle of rotation. The rotary plate 60 has a fastening wall 64, in which two through-holes 66 are arranged. Using these two through-holes 66, a stopper 68 can be detachably attached to the rotating plate 60, which is illustrated in FIGS. 2B and 2C with reference to different views. The stop 68 is equipped with three threaded rods 70, of which two threaded rods 70 can be inserted into the two through-holes 66. Consequently, the stopper 68 can be fixed to the rotating plate 60 at two different positions.The stop 68 is equipped with a first change-over part 72, which can be detachably connected to the remaining stop 68. The first changing part 72 is arranged such that, during the intended operation of the guide table 101, the saw blade 24 can come into contact with the first changing part 72, but not with the remaining stop 68.Furthermore, the stop 68 has a receiving section 74, by means of which a contact piece 75 illustrated in FIGS. 3A and 3B can be connected to the stop 68. The receiving section 74 comprises a second guide groove 76, which can be constructed identically to the first guide groove 32 and the third guide groove 34, but this is not necessary.Referring to FIGS. 3A and 3B, the aforementioned abutment piece 75 is shown with reference to different representations. The contact piece 75 forms a first contact surface 78 and a second contact surface 80 for the workpiece, which contact surfaces enclose an contact angle α with one another, which in the example shown is 120°. The second contact surface 80 is formed by a second replaceable part 84 which can be detachably connected to the contact piece 75.Furthermore, the contact piece 75 is equipped with a support plate 82, on which a workpiece can be placed. In order to be able to guide the saw blade 24 to the workpiece without sawing through the bearing plate 82, the bearing plate 82 is provided with a bearing plate cutout 83 which can be traversed by the saw blade 24 and which, in the exemplary embodiment shown, is formed by a third replaceable part 86 which is detachably fastened to the bearing plate 82. As can be seen in particular from FIG. 3B, the bearing plate cutout 83 does not run perpendicularly to the bearing plate 82, but rather encloses an angle of inclination β. This inclination angle β must be adjusted with the support table 14 of the band saw 12 in order to incline the guide table 101 such that the support plate cutout 83 runs parallel to the saw blade 24. A plurality of third changing parts 86 can be stored for different common inclination angles β, so that the contact piece 75 can be quickly adapted to the different inclination angles β. In addition, the distance of the support plate cutout 83 from the line of intersection of the first contact surface 78 and the second contact surface 80 can also be changed with correspondingly formed third interchangeable parts 86 in order to be able to produce workpieces of different sizes.In addition, the contact piece 75 is provided with a fixing device 88, with which the workpiece can be pressed against the bearing plate 82.In addition, the abutment piece 75 is provided with a second counter-guide section 90 which can cooperate with the second guide groove 76 of the stop 68, so that the abutment piece 75 can be displaced relative to the stop 68 along the displacement axis predefined by the second guide groove 76. When the desired position is reached, the contact piece 75 can be fixed to the stop 68 by fastening means 92, for example by means of slot nuts.It should be noted that further substantially identically constructed contact pieces can be provided for other contact angles α, for example 90° or 108°.The guide table 101 is used in the following manner: First, the guide table 101 is fixed to the support table 14 of the band saw 12 using the L-shaped fixing brackets 50. If the workpiece is to be sawn at an angle of inclination β, the angle of inclination β is adjusted with the support table 14.Subsequently, the rotating device 56 is connected to the stopper 68 and the first counter guide portion 58 is inserted into the first guide groove 32. The desired contact piece 75 is introduced into the second guide groove 76 by the second counter guide section 90, wherein the contact piece 75 is selected on the basis of the contact angle α. The contact piece 75 specifies the angle which the end faces of the relevant workpiece to be produced enclose with one another. In the case of the contact piece 75 shown in FIGS. 3A and 3B, this angle is 120°.The stop 68 is now advanced starting from the front edge 38 as far as the stationary saw blade 24. The position of the contact piece 75 relative to the stop 68 is checked and, if necessary, corrected. If the contact piece 75 is in the desired position, it is fixed with the fastening means 92 relative to the stop 68.The stopper piece 36 is then inserted into the third guide groove 34 and advanced until it comes into contact with the stopper 68. There, it is fixed in the third guide groove 34. The stop 68 is displaced away from the saw blade 24 and a roughly pre-cut workpiece is placed on the support plate 82 and at least pushed against the first contact surface 78 or the second contact surface 80. The workpiece is pressed against the bearing plate 82 by the fixing device 88 and is thus fixed. The band saw 12 can now be switched on and the workpiece sawn. For this purpose, the stop 68 is displaced together with the workpiece from the front edge 38 toward the saw blade 24.Referring to FIG. 3A, the saw blade 24 runs along the support plate cutout 83, Provided that the workpiece to be sawn has a straight end face and this end face is placed against the second contact surface 80, the angle which encloses the end face produced as a result of sawing with the already present end face is determined on the basis of the angle of the support plate cutout 83 with respect to the second contact surface 80.In the contact piece 75 shown, the contact angle α corresponds exactly to the angle at which the support plate cutout 83 meets the second contact surface 80, which, however, does not necessarily have to be the case. The contact angle of the contact piece 75 shown in FIG. 3A is 120°. When all end faces of the finished workpiece meet at this angle, the workpiece has the shape of a hexagon. As soon as at least two end faces meet at the angle of 120°, the workpiece can be placed both on the first contact surface 78 and on the second contact surface 80 for further machining, whereby a very precise and stable positioning can be achieved.FIG. 4 shows a second exemplary embodiment of a guide table 102 according to the invention, which is constructed in principle in the same way as the guide table 101 according to the first exemplary embodiment shown in FIGS. 1A and 1B. In this respect, only the essential differences will be discussed below. In the second exemplary embodiment of the guide table 102, the base plate 12 comprises a plurality of plate elements 94. specifically, a lower plate element 94 uis present, on which a total of three middle plate elements 94 mare placed. Further, three upper plate members 94o are laid on the middle plate members 94m. The plate elements 94 can be screwed or glued to one another and are designed as aluminum plates in the second exemplary embodiment of the guide table 102 shown. The lower plate member 94 uhas the largest plate thickness and the upper plate members 94 ohave the smallest plate thickness. The first guide groove 32 and the third guide groove 34 are formed in the following manner: the inside of the middle plate elements 94 mis arranged at a distance from the lateral middle plate elements 94 m, so that two middle longitudinal gaps 96 are formed. The inner one of the upper plate elements 94 ois also arranged at a distance from the lateral upper plate elements 94 o, so that two upper longitudinal gaps 98 are produced. However, the distance between the inner upper plate member 94m and the two side upper plate members 94o is smaller than the distance between the inner middle plate member 94m and the two side middle plate members 94m. As a result, the first guide groove 32 and the third guide groove 34 are formed, which have an undercut towards the top with respect to the representation selected in FIG. 4. The distances are selected such that the first counter-guide section 58 and the stopper piece 36 can be introduced into the first guide groove 32 and the third guide groove 34, respectively. The first guide groove 32 and the third guide groove 34 can therefore be produced relatively easily because milling of the base plate 16, as is necessary in the guide table 101 according to the first exemplary embodiment shown in FIGS. 1A and 1B, can be dispensed with. The procedure can be the same for the bearing piece 44 and for the fourth replaceable part 26, not shown here.The base plate cutout 22 passes through the inner upper plate member 94 o, the inner middle plate member 94 m, and the lower plate member 94 u.As mentioned, the plate elements 94 can be screwed together. Consequently, differently dimensioned middle plate elements 94 and differently dimensioned upper plate elements 94 can be used in order to be able to react flexibly to specific features of the relevant band saw 12. If one of the plate elements 94 is excessively worn, it can likewise be replaced with a new plate element 94 without great effort. In this respect, it is not absolutely necessary to provide a separate fourth changing part 26, but instead, for example, the inner upper plate element 94 ocan be replaced.The support table 14 of the band saw 12 has a guide depression 99 which can be used, for example, for guiding stops. This guide depression 99 is used in the present case to fasten the guide table 102 to the support table 14. Accessibility to the relevant fastening means is ensured by the fact that they are arranged below the bearing piece 44.In the second exemplary embodiment of the guide table 102, too, the base plate 12 is fastened to the support table 14 by means of L-shaped fastening brackets 50 and by means of corresponding fixing screws 52. However, two fastening brackets 50 are provided per fixing point, which brackets can be connected to one another and to the lower plate element 94 uin different positions. For this purpose, the fastening brackets 50 have a plurality of fixing holes, not shown here, through which fixing bolts or the like can be passed. The fixing screws 52 have rubber buffers 104, which can be pressed against the base plate 12 to fix the guide table 102. Consequently, it is possible to connect the guide table 102 to base plates 16 of different dimensions.Not shown is a depth stop for the bearing piece, which can have an adjusting screw.List of reference characters101, 102 Guide table 12 Band saw 14 Support table 16 Base plate 18 Upper side 20 Lower side 22 Base plate cutout 24 Saw blade 26 Fourth changing part 28 Base plate groove 30 Cutout 32 First guide groove 34 Third guide groove 36 Stopper piece 38 Front edge 40 Rear edge 42 Rotation pin 43 Depression 44 Bearing piece 46 Fixing screw 48 Drive unit 50 Fastening bracket 52 Fixing screw 54 Positioning stop 56 Rotation device 58 First counter-guide portion 60 Rotation plate 61 Rotation lever 62 Angle scale 64 Fastening wall 66 Through bore 68 Stop 70 Threaded rod 72 First changing part 74 Receiving portion 75 Contact piece 76 Second guide groove 78 First contact surface 80 Second contact surface 82 Bearing plate 83 Bearing plate cutout 84 Second changing part 86 Third changing part 88 Fixing device 90 Second counter-guide portion 92 Fastening means 94 Plate elements 96 Central longitudinal gap 98 Upper longitudinal gap 99 Guide recess 104 Rubber buffer D Rotation axis α Contact angle β Inclination angle

Claims

Guide table (101, 102) for a band saw (12) having a saw blade (24) for sawing a workpiece, comprising - a base plate (16) having an upper side (18) and a lower side (20), - a first guide groove (32) proceeding from the upper side (18), and - a rotation device (56) having a first counter-guide section (58) and a stop (68) for the workpiece which can be rotated relative to the first counter-guide section (58), wherein the first counter-guide section (58) can be introduced or is introduced into the first guide groove (32) in order to move the rotation device (56) along the same.Guide table (101, 102) according to Claim 1, characterized in that the rotation device (56) is configured such that the stop (68) is rotatable relative to the first counter-guide section (58) about an axis of rotation (D) running perpendicular to the upper side (18).Guide table (101, 102) according to either of Claims 1 and 2, characterized in that the first mating guide section (58) and the first guide groove (32) have a shape which is complementary to one another.Guide table (101, 102) according to one of the preceding claims, characterized in that the stop (68) is designed as a separate component and can be detachably connected to the rotation device (56).Guide table (101, 102) according to one of the preceding claims, characterized in that the stop (68) has a first replaceable part (72) which can be detachably connected to the stop (68).Guide table (101, 102) according to one of the preceding claims, characterized in that the stop (68) has a receiving section (74) for receiving an abutment piece (75) for the workpiece.Guide table (101, 102) according to one of the preceding claims, characterized in that the contact piece (75) has a first contact surface (78) and a second contact surface (80) for the workpiece, which contact surfaces form a contact angle (α) with respect to one another.Guide table (101, 102) according to either of Claims 6 and 7, characterized in that the bearing piece (75) comprises a bearing plate (82) for the workpiece, which bearing plate has a bearing plate cutout (83), into which the saw blade (24) of the band saw (12) can be introduced or is introduced.Guide table (101, 102) according to one of Claims 6 to 8, characterized in that the second contact surface (80) is formed by a second replaceable part (84) which can be detachably connected to the contact piece (75).Guide table (101, 102) according to either of Claims 7 and 8, characterized in that the bearing plate cutout (83) is formed by a third interchangeable part (86) which can be detachably connected to the bearing plate (82).Guide table (101, 102) according to one of Claims 5 to 9, characterized in that the receiving section (74) has a second guide groove (76), into which a second mating guide section (90) can be introduced or is introduced for displacing the contact piece (75) relative to the stop (68).Guide table (101, 102) according to Claim 11, characterized in that the bearing piece (75) has fastening means (92) which interact with the second guide groove (76) in order to fix the position of the bearing piece (75) relative to the stop (68).Guide table (101, 102) according to one of Claims 8 to 12, characterized in that the bearing piece (75) comprises a fixing device (88) for fixing the workpiece on the bearing plate (82).Guide table (101, 102) according to one of the preceding claims, characterized in that the base plate (16) has a base plate cutout (22), into which the saw blade (24) of the band saw (12) can be introduced or is introduced, wherein the base plate cutout (22) is formed by a fourth replaceable part (26) which can be detachably connected to the base plate (16).Guide table (101, 102) according to one of the preceding claims, characterized in that the guide table (101, 102) has a rotation pin (42) for rotatably guiding the workpiece.Guide table (101, 102) according to Claim 15, characterized in that the rotary pin (42) is arranged on a bearing piece (44) which is mounted displaceably relative to the base plate (16).Guide table (101, 102) according to one of the preceding claims, characterized in that the guide table (101, 102) has a third guide groove (34), which extends from the upper side (18) and into which a stopper piece (36) can be introduced and fixed in a displaceable manner.Guide table (101, 102) according to one of the preceding claims, characterized in that the base plate (12) comprises two or more than two plate elements (94) which are connected to one another.A band saw (12) for sawing a workpiece, comprising a guide table (101, 102) according to any one of the preceding claims.

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