Machining unit and method for machining workpieces

Abstract

The invention relates to a machining unit (10) for machining workpieces (11), having at least one machining device (12) and a conveyor device (14), wherein the conveyor device (14) has a workpiece support (15), which is designed to allow the movement of a workpiece (11) lying thereon, first cams (16), which are spaced transversely to a conveyor direction (F), can be moved in the conveyor direction (F) and are designed to move the workpiece (11) while the first cams (16) rest against a rear edge of the workpiece (11), and drive units (18) which are designed to move the first cams (16), said first cams (16) being movable independently of one another. The invention additionally relates to a method for machining workpieces (11).

Description

[0001] MACHINING MACHINE AND METHOD FOR MACHINING WORKPIECES

[0002] Technical area

[0003] The invention relates to a processing machine for processing workpieces, in particular made of wood, wood materials, plastic, composite materials or comparable materials, as well as a method for processing such workpieces.

[0004] State of the art

[0005] Processing machines are known in which a large number of workpieces are moved to one or more processing devices in a continuous process for carrying out a processing operation. For this purpose, a conveyor device is usually provided, which is designed as a continuous conveyor device with a conveyor chain, a conveyor belt, or a conveyor belt. To prevent the workpieces from slipping, the conveyor device also has another belt above the workpieces as a top pressure belt, so that the workpieces can be held between this belt and the conveyor chain. In particular, the transfer of workpieces from a feed device to such a conveyor device can lead to problems due to the forces that occur. The conveyor chain, the conveyor belt, or the conveyor belt also requires regular adjustment or tensioning and, as a wearing part, must be regularly maintained and replaced. Description of the invention

[0006] The invention is based on the object of proposing a processing machine and a method for processing workpieces, by means of which a simple and safe conveying of workpieces is possible and an optimization of the processing time and a high processing quality is achieved when processing workpieces.

[0007] A processing machine according to the invention is defined in claim 1. A method according to the invention is defined in claim 10. Subclaims relate to specific embodiments.

[0008] The object is achieved by a processing machine, comprising at least one processing device for carrying out a processing operation on a workpiece and a conveying device for bringing about a conveying movement of the workpiece into a processing area of ​​the at least one processing device, wherein the conveying device has a workpiece support, in particular a roller conveyor, roller bar, slide rail or air cushion device, which is designed to allow a movement of a workpiece resting thereon, and first cams spaced transversely to a conveying direction and / or second cams spaced transversely to a conveying direction, which are movable in the conveying direction and are designed to displace the workpiece, while the first cams rest on a rear edge of the workpiece and / or the second cams rest on a front edge, and drive units which are designedto move the first cams and / or the second cams, wherein the first cams and / or the second cams are movable independently of each other.,

[0009] Thus, it is possible to provide first cams according to one embodiment and second cams according to another embodiment. Furthermore, the processing machine can be equipped with both first and second cams.

[0010] This processing machine has the advantage that workpieces of different thicknesses can be moved independently of one another. Furthermore, the cycle sequence for each workpiece can be individually selected or adjusted.

[0011] Transferring a workpiece to the processing machine using a feeder is no longer necessary, as the feeder function is, to a certain extent, integrated into the processing machine. This minimizes accuracy / tolerance deviations.

[0012] Furthermore, the processing machine has the advantage that no cams are "missed". This means no loss of performance.

[0013] Furthermore, the processing machine can be adapted to the respective production requirements of the upstream and downstream production processes. This means that the speed and cam cycle can be optimized directly based on the production requirements. For example: tight cam cycle and slow speed, or longer cam cycle and higher speed. This allows the machine to be operated more variably and, at the same time, influences the processing quality (e.g., lower speed and higher quality).

[0014] According to one embodiment, process forces acting on the workpiece during machining can be recorded, stored, and processed. This information can be used, for example, to determine the degree of wear of a machining tool, such as a milling cutter. The machining machine is preferably a through-feed machine. In this case, a plurality of workpieces are successively moved in the conveying direction relative to the at least one machining device by the conveyor device and are machined by the latter.

[0015] The processing machine can be designed for both double-sided, i.e., two-sided, processing of the workpieces and also for single-sided processing of the workpieces. Likewise, the processing machine can be designed for performing a circular processing of the workpieces by means of the at least one processing device.

[0016] The at least one processing device can be any device for processing the workpieces, for example a device for formatting the workpieces, for applying a coating material, in particular an edge material to the workpieces, for processing an edge of the workpieces or the like.

[0017] The at least one processing device can be designed, for example, as a boom processing unit, preferably a traveling boom processing unit, or as a robot unit.

[0018] The conveying device is in particular designed to receive the workpieces to be machined from a feeder, to convey them through the processing machine and to discharge the workpieces from the processing machine after the processing operation. The processing of the workpieces by the at least one processing device can be provided during the conveying movement of the workpieces and / or during an interruption of the conveying movement. A further development of the processing machine can provide for second cams which are spaced apart transversely to the conveying direction and are movable in the conveying direction and are designed to clamp the workpiece in that the second cams bear against a front edge of the workpiece and the first cams bear against the rear edge of the workpiece, wherein the second cams are movable independently of one another and in particular independently of the first cams.

[0019] By placing the second cams against the front edge of the workpiece, the workpiece can be clamped between the first and second cams. This ensures that the workpiece is held in position and does not slip during the conveying movement, and especially during the machining process. Furthermore, the second cams can enable alignment of the workpieces along their front edge.

[0020] The first and / or second cams can preferably be individually positioned relative to one another. In this way, the positions of the cams can be adapted to the geometry of the workpiece in order to clamp different workpiece geometries using the cams. For example, round or curved workpieces or free-form workpieces can also be clamped using the cams in this way. In a crash situation, damage can be avoided because the first and / or second cams are displaced in such a situation and then return to their correct position.

[0021] The drive units preferably comprise linear motors with movable magnets. The magnets are preferably rotatably movable. Furthermore, the position of the cams relative to the magnets is preferably adjustable.

[0022] By using linear motors with movable magnets, a conveyor system can be designed with individually movable cams. The use of rotating magnets is particularly advantageous because, after conveying, they do not have to be moved back to their original position along the same path, but can be moved back in a circular path outside the conveying path. This enables continuous and therefore efficient conveying, especially when conveying several workpieces in succession.

[0023] The ability to adjust the cam positions in relation to the moving magnets reduces restrictions due to the dimensions of the magnets. This means that, for example, even particularly narrow workpieces can be conveyed by positioning the first (rear) cams further forward in the conveying direction on the corresponding magnet and the second (front) cams further back in the conveying direction on the corresponding magnet. The first (rear) cams can also be positioned further back in the conveying direction and the second (front) cams can also be positioned further back in the conveying direction. Other cam positions are also conceivable for other workpieces.

[0024] In some sections, it may also be provided that the cams are driven by an alternative drive device, e.g. by servo motors or the like.

[0025] A further development of the processing machine can also provide that the first cams and the second cams are designed to clamp the workpiece at least during the processing operation by the at least one processing device.

[0026] This ensures that the workpiece is fixed during the machining process and enables precise machining of the workpiece by the at least one machining device. In a further embodiment of the processing machine, a clamping device can also be provided on each of the first cams and / or the second cams, which clamping device is designed to releasably fix the workpiece at least during the machining process.

[0027] Preferably, the clamping device is configured to apply a clamping force to an upper side and / or lower side of the workpiece.

[0028] The clamping device allows the workpiece to be fixed in a defined position relative to the cams, so that precise machining of the workpiece is possible, preferably during the conveying movement.

[0029] The clamping device can, for example, be formed by one or more controllable clamping jaws. These can preferably engage the top and / or bottom of the workpiece and fix it to the cams through the clamping force. Different workpiece thicknesses can be fixed by the clamping device, so that workpieces of different thicknesses can be conveyed successively by the conveyor system.

[0030] Preferably, four clamping devices are provided so that one clamping device can be successively released from the workpiece while the remaining three clamping devices fix the workpiece.

[0031] Advantageously, the processing machine can be configured so that the first cams and the second cams are configured to control a conveying speed of the workpiece as a function of the machining process. In this way, the cycle sequence can be flexibly adjusted. Preferably, the conveying speed of the workpiece can be controlled, in particular variably adjustable, during the machining process on the workpiece.

[0032] In this way, the workpiece can be conveyed at a varying conveying speed depending on the machining process. The conveying speed of the workpiece can therefore be adapted to the respective machining process, so that, for example, a slower conveying movement can be controlled when machining corner areas of the workpiece than when machining side areas / side edges of the workpiece.

[0033] By controlling the conveyor speed in this way, the processing time of the workpieces can be optimized and at the same time a high processing quality can be ensured.

[0034] A further advantageous embodiment of the processing machine can provide that the conveying device has a plurality of first and second pairs of cams for conveying a plurality of workpieces, wherein different conveying speeds of the workpieces can be controlled by the plurality of first and second pairs of cams.

[0035] As a result, a large number of workpieces can be conveyed consecutively by the conveying device. Furthermore, preferably, successive workpieces can be conveyed at individually adjustable conveying speeds. In particular, the workpieces can be conveyed at conveying speeds that can be individually adjusted to the respective machining operation. For example, if the processing machine has several processing devices with different processing speeds, different conveying speeds can be provided for the workpieces in the area of ​​the respective processing device.

[0036] Particularly preferably, in the processing machine, the first cams and / or the second cams can be detachable from a clamping position on the workpiece during the processing operation, in particular independently of one another, so that multi-sided processing of the workpiece can be carried out by the at least one processing device.

[0037] This allows the cams to be individually released from the workpiece, allowing machining of the workpiece in the clamping area of ​​the released cam. In particular, it is intended that the other cams continue to rest on the workpiece and secure it.

[0038] In this way, machining of several, preferably all, side areas of the workpiece can be provided. In particular, the independent release of the cams from the workpiece can enable circumferential machining of the workpiece.

[0039] Advantageously, the processing machine can have a detection device which is designed to detect dimensions of the workpiece by the contact of the first cams and / or second cams on the workpiece.

[0040] The recorded dimensions can preferably be transmitted to a control device and stored in a data memory. Based on the recorded dimensions, quality assurance can be provided for the workpieces machined by the processing machine.

[0041] Advantageously, the processing machine can have a control device which is designed to control the at least one processing device and / or the conveying device, in particular the first and second cams, depending on a detection result of the detection device.

[0042] Based on the detected dimensions of the workpiece, an automated control and / or regulation of the conveying device and / or the at least one processing device can be provided. Such control and / or regulation of the conveying device and / or the at least one processing device can compensate for detected deviations in the dimensions, tolerances, or the like of the workpiece.

[0043] According to a further embodiment, a processing machine is provided that has a detection device. The detection device is configured to detect process forces that occur on the workpiece during machining. Recorded data on process forces can be further processed, for example, by means of a control device of the processing machine. It is also possible to document the data.

[0044] In particular, the processing machine is provided with a control device configured to monitor the recorded data of the process forces for deviations from a target state. This data can be processed and made available in a targeted manner.

[0045] It is preferred that the data on process forces be stored and output for quality monitoring / logging purposes.

[0046] The object is also achieved by a method for machining workpieces, in particular with a processing machine according to one of the previously described embodiments, the method comprising the steps of: conveying a workpiece into a machining area of ​​at least one machining device by bringing first cams into contact with a rear edge of the workpiece and / or second cams into contact with a front edge of the workpiece, and moving the cams in a conveying direction; carrying out a machining operation by the at least one machining device while the workpiece is in contact with the workpiece by the first cams and / or second cams; removing the workpiece from the machining area of ​​the at least one machining device by the conveying device.

[0047] If first and second cams are provided, the first cam and the second cam can clamp the workpiece between them.

[0048] In this method, a plurality of workpieces are preferably conveyed in a continuous process, i.e. consecutively, to the at least one processing device and processed by it.

[0049] By means of the at least one processing device, the workpieces can be processed on one side, on both sides, preferably on multiple sides, in particular in a rotating manner.

[0050] By placing the first and second cams against the rear and front edges of the workpiece, the workpiece can be clamped between the cams. This allows the workpiece to be fixed in a defined position, particularly during the machining process.

[0051] Preferably, the cams can be positioned independently of each other, in particular transversely and / or longitudinally to the conveying direction. In this way, the workpiece can be aligned in the defined position by the first and / or second cams in order to enable precise machining of the workpiece by the at least one machining device, and different

[0052] Workpiece geometries can be clamped.

[0053] An embodiment of the method can further provide that the workpiece is fixed at least during the machining process by a holding device, in particular a clamping device or vacuum clamping device, of the first and / or second cams, in particular by applying a holding force, in particular a clamping force, to an upper side and / or lower side of the workpiece.

[0054] This ensures that the workpiece does not slip during the machining process and is held in the defined position relative to the cams.

[0055] In a further development of the method, it can also be provided that the workpiece, in particular during the machining process, is conveyed by the first and second cams at a variable conveying speed depending on the machining process.

[0056] This allows the workpiece to be conveyed at different conveying speeds adapted to the respective machining operation. In particular, the conveying speed of the workpiece can be varied while the machining operation is being carried out in order to adapt the conveying speed of the workpiece to a machining step of the machining operation. For example, when machining a corner area of ​​the workpiece, which requires a slower conveying movement of the workpiece, the conveying speed of the workpiece can be reduced, and when machining side areas / side edges of the workpiece, which allows a faster conveying movement of the workpiece, the conveying speed of the workpiece can be increased. In this way, shorter machining times and, at the same time, high machining quality can be ensured.Advantageously, in the method, during the machining operation, the first cams and / or the second cams can be released from a clamping position on the workpiece, in particular independently of one another, and the workpiece can be machined on several sides by the at least one machining device.

[0057] By releasing the cams from the clamping position, the workpiece can be machined by the at least one machining device in the clamping area of ​​the cams. Because the cams can be released from the clamping position independently of one another, multi-sided, particularly circumferential, machining of the workpiece can be easily enabled. Preferably, one cam is released from the workpiece at a time while the other cams clamp the workpiece.

[0058] An embodiment of the method can also provide that dimensions of the workpiece are detected by a detection device by the contact of the first cams and / or the second cams on the workpiece.

[0059] This allows for reliable and rapid quality assurance by recording the dimensions of the workpiece and determining and monitoring the dimensional accuracy and / or parallelism of the workpieces.

[0060] For quality assurance purposes, the recorded dimensions can be transmitted to a control device and stored in a data storage device. The recording results can be used, for example, to regulate the at least one processing device, to control a subsequent machining operation, and / or for later assessment of workpiece quality. In a further development of the method, it can be provided that a recording result from the recording device is transmitted to a control device, and the at least one processing device and / or the conveying device, in particular the first and second cams, is controlled depending on the recording result.

[0061] As a result, the conveying device and / or the at least one processing device can be controlled and / or regulated on the basis of the detected dimensions, preferably automatically, in order to compensate for workpiece tolerances, deviating dimensions or the like.

[0062] According to a further embodiment, a detection device detects process forces that occur on a workpiece during machining. Recorded data on process forces can be further processed, for example, by a control device of the processing machine. It is also possible to document the data.

[0063] In particular, it is intended that the recorded data of the process forces be monitored for deviations from a target state. This data can be processed and made available in a targeted manner.

[0064] Furthermore, it is preferred that the data on process forces are stored and output for the purposes of quality monitoring / logging.

[0065] For the previously described processing machine and the previously described method, any possible linear expansion of the processing machine at different temperatures can be compensated for via a reference run. Furthermore, adjustments required for a conventional conveyor chain (e.g., different tensioning of the individual chains) can be avoided. The same applies to partial overstretching of the conventional chain during a "crash run" or when manually overtensioning the conventional chains.

[0066] Short description of the drawings

[0067] Further features and advantages of a device, a use and / or a method will become apparent from the following description of embodiments with reference to the accompanying drawings. These drawings show:

[0068] Fig. 1 is a schematic side view of an embodiment of a processing machine according to the disclosure;

[0069] Fig. 2 is a schematic plan view of the processing machine in Fig. 1;

[0070] Description of embodiments

[0071] The same reference symbols appearing in different figures indicate identical, corresponding, or functionally similar elements.

[0072] Fig. 1 shows an embodiment of a processing machine 10 according to the disclosure for processing workpieces 11 in a schematic side view and Fig. 2 shows the processing machine 10 in a schematic plan view.

[0073] The processing machine 10 is designed, in particular, as a through-feed machine in which workpieces 11 are moved relative to one or more processing devices 12. The processing machine 10 is preferably a woodworking machine. The processing machine 10 can be a CNC-controlled processing machine or a CNC-controlled machining center.

[0074] The workpieces 11 to be machined are, in particular, workpieces that are at least partially made of wood, wood-based materials, plastic, or the like. The workpieces 11 can preferably be plate-shaped workpieces, for example solid wood or chipboard, lightweight panels, sandwich panels, or the like. However, the present invention is not limited to such workpieces 11.

[0075] According to Fig. 1, the processing machine 10 comprises two processing devices 12, each of which can carry out a preferably different machining operation on the workpieces 11 to be machined. Likewise, the processing machine 10 can also have only one processing device 12 or more than two processing devices. If only the singular form is used for the processing devices 12 in the following description, this also means that several processing devices 12 can be provided accordingly.

[0076] The processing device 12 can be any desired processing device for processing the workpieces 11. The processing device 12 can, for example, be designed to carry out a milling process, sawing process, drilling process, cross-cutting process, printing process or the like. The processing device 12 can also be designed to coat the workpieces 11, to apply an edge material or to rework a coating and / or edge material. The processing device 12 can be a processing unit. The processing device 12 can be designed as a cantilever processing unit, preferably a traveling cantilever processing unit, as a gantry or as a robot unit.

[0077] To carry out a machining operation, the machining device 12 is preferably movable relative to the workpieces 11 by an adjusting device 13.

[0078] The processing machine 10 has a conveyor device 14 which is designed as a continuous conveyor device.

[0079] The conveying device 14 comprises a workpiece support 15, which enables movement of the workpiece 11 resting thereon. The workpiece support 15 is preferably designed as a roller conveyor, roller bar, or air cushion device. The workpieces 11 to be machined rest on the workpiece support 15 and are movable in a conveying direction F.

[0080] The conveying device 14 also comprises first cams 16 and second cams 17 which are movable in the conveying direction F and are designed to clamp the workpiece 11 and to move it on the workpiece support 15 by the first cams 16 abutting a rear edge of the workpiece 11 and the second cams 17 abutting a front edge of the workpiece 11.

[0081] The first cams 16 are spaced apart from one another transversely to the conveying direction F and the second cams 17 are spaced apart from one another transversely to the conveying direction F, wherein the cams 16, 17 can be positioned independently of one another, in particular the second cams 17 can be moved independently of the first cam 16 in order to be able to clamp and convey workpieces 11 of different sizes and different geometries, as is shown in Fig. 2. The movement of the first and second cams 16, 17 can be controlled by drive units 18. The drive units 18 are preferably designed as linear motors with movable magnets (not shown in detail). The magnets can preferably be moved in a rotating manner. The rotating magnets are preferably moved back in a circular path outside the conveying path in order to enable continuous conveying of a plurality of workpieces 11.

[0082] Preferably, the position of the cams 16, 17 is adjustable with respect to the magnets, whereby the cams 16, 17 can be individually positioned relative to one another.

[0083] A clamping device 19 (holding device) is provided on each of the first and second cams 16, 17, by means of which the workpiece 11 can be fixed in a defined position between the cams 16, 17. The clamping device 19 can be formed, for example, by one or more clamping jaws that engage an upper side and / or lower side of the workpiece 11 and releasably clamp it by a clamping force.

[0084] The clamping devices 19 can be adjustable such that workpieces 11 of different thicknesses can be secured by them. This allows workpieces 11 of different thicknesses to be conveyed successively.

[0085] As shown in Fig. 1, the conveying device 14 comprises a plurality of first and second pairs of cams 16, 17 for clamping and conveying a plurality of workpieces 11. In particular, it is provided that the plurality of first and second pairs of cams 16, 17 can be moved at different conveying speeds. In this way, the conveying speeds of the workpieces 11 can be set independently of one another depending on the machining operation to be carried out on the respective workpiece 11. Such control of the conveying speeds of the workpieces 11 with respect to one another can be provided, for example, if the processing machine 10 has a plurality of processing devices 12 which have different processing speeds or also if different types of workpieces 11 are processed which require different processing times.

[0086] Particularly preferably, the first and second cams 16, 17 are configured such that the conveying speed of the workpiece 11 can be variably adjusted or changed during the machining operation performed on the workpiece 11 depending on the machining operation. As a result, the conveying speed of the workpiece 11 can be individually adjusted for a corresponding machining step of the machining operation.

[0087] The conveying speed can therefore be controlled in such a way that the conveying speed is slowed down when a machining step requires a longer machining time, for example the machining of corner regions of the workpiece 11, and the conveying speed is increased when a machining step allows a shorter machining time, for example the machining of side regions / side edges of the workpiece 11.

[0088] The first cams 16 and second cams 17 can be released from a clamping position on the workpiece 11 independently of one another during the machining process. In particular, it is provided that one cam 16, 17 can be successively released from the clamping position on the workpiece 11, while the other cams 16, 17 remain in the clamping position and fix the workpiece 11. In this way, it is possible for the workpiece 11 to be machined on multiple sides, preferably circumferentially, by the machining device 12 in one pass through the machining machine 10.

[0089] In addition, the processing machine 10 comprises a detection device 20 for detecting dimensions of the workpiece 11 clamped between the first and second cams 16, 17. In particular, the detection device 20 is configured to detect the dimensions of the workpiece 11 as a function of the positions of the first and second cams 16, 17 relative to one another while the first and second cams 16, 17 bear against the workpiece 11.

[0090] The dimensions of the workpiece 11 detected by the detection device 20, i.e. a detection result of the detection device 20, are transmitted to a control device 21, which controls the processing device 12 and / or the cams 16, 17 of the conveyor device 14 on the basis of the detected dimensions.

[0091] Preferably, the control device 21 can control an actuating movement of the actuating device 13 depending on the detection result. For example, the actuating device 13 can execute an actuating movement of the machining device 12 in an X-direction, Y-direction, and / or Z-direction. Likewise, the control device 21 can control the machining process, in particular a machining tool of the machining device 12, depending on the detection result.

[0092] Likewise preferably, the control device 21 can control the conveying speed of the conveying device 14 and / or the positions of the first and second cams 16, 17.

[0093] In this way, a control of the processing device 12 and / or the conveying device 14 can be provided on the basis of the detection result, i.e. the detected dimensions.

[0094] The recorded data can also be used for quality assurance of the workpieces, for monitoring the machining process, for determining service intervals or the like.

[0095] It will be apparent to those skilled in the art that individual features described in different embodiments may also be implemented in a single embodiment, provided they are not structurally incompatible. Likewise, various features described in a single embodiment may also be provided in multiple embodiments, individually or in any suitable subcombination.

Claims

CLAIMS 1. A processing machine (10) for processing workpieces (11), which preferably consist at least partially of wood, wood materials, plastic or the like, comprising: at least one processing device (12) for carrying out a processing operation on a workpiece (11), a conveying device (14) for bringing about a conveying movement of the workpiece (11) into a processing area of ​​the at least one processing device (12), wherein the conveying device (14) comprises: a workpiece support (15), in particular a roller conveyor, roller bar, slide rail or air cushion device, which is designed to allow a movement of a workpiece (11) resting thereon, and first cams (16) spaced transversely to a conveying direction (F) and / or second cams (17) spaced transversely to a conveying direction (F), which are movable in the conveying direction (F) and are designed to displace the workpiece (11),while the first cams (16) rest on a rear edge and / or the second cams (17) on a front edge of the workpiece (11), and, Drive units (18) which are arranged to move the first cams (16) and / or the second cams (17), wherein the first cams (16) and / or the second cams (17) are movable independently of one another.

2. Processing machine according to claim 1, wherein the conveying device (14) further comprises: the first cams (16) and second cams (17) are arranged to clamp the workpiece (11) by the second cams (17) on a front edge of the workpiece (11) and the first cams (16) bear against the rear edge of the workpiece (11), wherein the second cams (17) are movable independently of the first cams (16).

3. Processing machine according to claim 1 or 2, wherein the first cams (16) and the second cams (17) are further configured to clamp the workpiece (11) at least during the processing operation by the at least one processing device (12).

4. Processing machine according to one of the preceding claims, in which a holding device, in particular a clamping device (19) or vacuum clamping device, is further provided on the first cam (16) and / or the second cam (17), which is designed to releasably fix the workpiece (11) at least during the processing operation, in particular by a holding force, in particular a clamping force, applied to an upper side and / or lower side of the workpiece (11).

5. Processing machine according to one of the preceding claims, wherein the first cams (16) and the second cams (17) are further configured to control a conveying speed of the workpiece (11) as a function of the machining operation, in particular to control the conveying speed of the workpiece (11) during the machining operation on the workpiece (11).

6. Processing machine according to one of the preceding claims, wherein the conveying device (14) further comprises a plurality of first and second pairs of cams (16, 17) for conveying a plurality of workpieces (11), wherein different conveying speeds of the workpieces (11) can be controlled by the plurality of first and second pairs of cams (16, 17).

7. Processing machine according to one of the preceding claims, in which the first cams (16) and / or the second cams (17) can be released from a clamping position on the workpiece (11) during the processing operation, in particular independently of one another, so that multi-sided processing of the workpiece (11) can be carried out by the at least one processing device (12).

8. Processing machine according to one of the preceding claims, in which a detection device (20) is further provided which is designed to detect dimensions of the workpiece (11) by the contact of the first cams (16) and / or second cams (17) on the workpiece (11).

9. Processing machine according to claim 8, further comprising a control device (21) which is configured to control the at least one processing device (12) and / or the conveying device (14) in dependence on a detection result of the detection device (20).

10. Processing machine according to one of the preceding claims, further comprising a detection device which is configured to detect process forces occurring on the workpiece during the processing of a workpiece, wherein it is preferred that the processing machine has a control device which is configured to monitor the detected data of the process forces with regard to deviations from a desired state.

11. Method for machining workpieces (11), which preferably consist at least in sections of wood, wood materials, plastic or the like, in particular with a machining machine (10) according to one of the preceding claims, comprising the steps: Conveying a workpiece (11) into a processing area of ​​at least one processing device (12) by bringing first cams (16) into contact with a rear edge of the workpiece (11) and / or second cams (17) into contact with a front edge of the workpiece (11), and moving the first and / or second cams (16, 17) in a conveying direction (F), Carrying out a machining operation by the at least one machining device (12) while the first cams (16) and / or second cams (17) are in contact with the workpiece, Removing the workpiece (11) from the processing area of ​​the at least one processing device (12) by the conveyor device (14) .

12. The method according to claim 11, wherein the workpiece (11) is further fixed at least during the machining operation by a holding device, in particular a clamping device (19) of the first and / or second cams (17), in particular by applying a holding force, in particular a clamping force, to an upper side and / or lower side of the workpiece (11).

13. The method according to claim 11 or 12, wherein the workpiece (11) is conveyed by the first and second cams (17) at a variable conveying speed, in particular during the machining process, depending on the machining process.

14. Method according to one of claims 11 to 13, wherein further during the machining operation the first cams (16) and / or the second cams (17), in particular independently of one another, are released from a clamping position on the workpiece (11) and the workpiece (11) is machined on several sides by the at least one machining device (12).

15. Method according to one of claims 11 to 14, in which dimensions of the workpiece (11) are further detected by a detection device (20) by the contact of the first cams (16) and / or the second cams (17) on the workpiece (11), wherein it is preferred that a detection result of the detection device (20) is further transmitted to a control device (21) and the at least one processing device (12) and / or the conveying device (14) is controlled depending on the detection result.

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