Method and device for positioning and method and device for machining a flat workpiece, in particular a sheet

Abstract

During a positioning method to position a flat workpiece (2) to be machined, in particular a sheet to be machined, for machining by means of a machining device (12), the workpiece (2) is moved, by means of a controlled positioning drive (8), with a positioning movement in a feed direction (7) to a machining position. During the positioning movement, the workpiece (2) is supported on a workpiece support (17) which, during the positioning movement of the workpiece (2), is moved, by means of a controlled support drive (19), with a support movement in the feed direction (7). To avoid a slip between the workpiece (2) and the workpiece support (17) during the positioning movement of the workpiece (2), the support drive (19) and the positioning drive (8) are synchronised prior to the positioning movement of the workpiece (2) in that a control (20) of the support drive (19) and a control (11) of the positioning drive (8) are calibrated. The aforementioned positioning method is part of a machining method for machining a flat workpiece (2), in particular a sheet. A positioning device and a mechanical arrangement (1) are designed to carry out the aforementioned positioning method and the aforementioned machining method.

Description

[0001] Applicant:

[0002] TRUMPF Machine Tools SE + Co. KG

[0003] Johann-Maus-Strasse 2

[0004] 71254 Ditzingen

[0005] Germany

[0006] Method and device for positioning and method and device for machining a plate-like workpiece, in particular a sheet metal The invention relates to a positioning method for positioning a plate-like workpiece to be machined, in particular a sheet metal to be machined, for machining by means of a machining device,

[0007] • wherein the workpiece is moved into a machining position by means of a controlled positioning drive with a positioning movement in a feed direction and

[0008] • wherein the workpiece is supported on a workpiece support during the positioning movement, which is moved in the feed direction by means of a controlled support drive during the positioning movement of the workpiece. The invention also relates to a machining method for machining a plate-like workpiece, in particular a sheet metal, using a machining device, wherein the workpiece is positioned in a working area of ​​the machining device prior to machining using a positioning method of the above type.

[0009] TRUMPF Werkzeugmaschinen SE + Co. KG DS16781P3676WOO The invention further relates to a device for carrying out the above positioning method and to a mechanical arrangement for carrying out the above machining method.

[0010] For example, in sheet metal processing from a coil, a partial length of a sheet metal strip wound into a coil is unwound from the coil and a subsequent straightening process and fed into the work area of ​​a mechanical arrangement for sheet metal processing as the sheet to be processed. In the work area of ​​the mechanical arrangement there is a workpiece support on which the sheet is stored in a processing position during processing. Before processing begins, the sheet is moved into the processing position by means of a numerically controlled positioning drive in a feed direction. During its positioning movement, the sheet is supported on the workpiece support. In particular to avoid damage to the sheet surface on the support side, the sheet movement in the feed direction is followed by the workpiece support.For this purpose, the workpiece support is moved together with the sheet in the feed direction by means of a numerically controlled support drive.

[0011] The prior art in this field is disclosed in WO 2014 / 122524 Al.

[0012] The object of the present invention is to enable a particularly surface-protecting movement of the plate-like workpiece to be machined into the machining position.

[0013] According to the invention, this object is achieved by the positioning methods according to patent claim 1 and patent claim 4, by the machining method according to patent claim 8, by the positioning devices according to patent claim 10 and patent claim 11 and by the mechanical arrangement according to patent claim 12.

[0014] In the case of the invention, the support drive, by means of which the workpiece support loaded with the workpiece to be positioned is moved in the feed direction, and the positioning drive, which drives the workpiece in the feed direction, are synchronized before a workpiece is moved into the machining position. By calibrating the control of the support drive and the control of the positioning drive for this purpose, synchronization of the workpiece support moved by the support drive and the workpiece advanced by the positioning drive is achieved for the subsequent positioning of a workpiece to be machined.As a result of the synchronous running, an otherwise possible slippage between the workpiece support and the workpiece mounted on the workpiece support and a stress, in particular mechanical, on the workpiece surface on the support side resulting from the slippage between the workpiece support and the workpiece are avoided.

[0015] When processing sheet metal from a coil, the inventive synchronization of the support drive and the positioning drive can be performed before a first section of the sheet metal strip wound into the coil is moved into the processing position. It is also conceivable to synchronize the support drive and the positioning drive during the processing of a coil as soon as surface damage is detected on a section of the sheet metal strip moved into the processing position or on the processed products, indicating slippage between the workpiece moved into the processing position and the workpiece support.

[0016] The workpiece support is preferably designed as a continuously rotating support belt. If the support belt is motor-driven by means of a drive wheel, the pitch circle diameter of the drive wheel determines the length of the support movement resulting from one rotation of the drive wheel. A value for the pitch circle diameter of the drive wheel of the support drive, stored in the numerical control of the support drive by programming the control system, can therefore be used as the basis for controlling the support drive.

[0017] A particularly suitable positioning drive is a numerically controlled drive with at least one feed roller, which moves the test workpiece or the workpiece to be machined in the feed direction with frictional engagement. A measuring wheel rolling on the test workpiece or the workpiece to be machined can be used to determine the path length of the test and regular positioning movements. A pitch circle diameter of the measuring wheel, programmed into the numerical control of the positioning drive, is then suitable as a control variable for controlling the positioning drive.

[0018] In the event of a deviation of the determined actual path length of the test workpiece movement from the target path length of the test workpiece movement and / or in the event of a deviation of the determined actual distance between the first and the second test workpiece marking from the target distance, the desired synchronization of the workpiece support and the workpiece mounted on the workpiece support can be ensured by appropriate reprogramming of the pitch circle diameter of the drive wheel of the support drive used as the control variable and / or the pitch circle diameter of the measuring wheel of the positioning drive used as the control variable.

[0019] The processing device of the mechanical arrangement according to the invention is designed in particular as a laser processing device, for example as a laser cutting head, and is numerically controlled and movable in two axes in a plane running parallel to the workpiece or test workpiece surface.

[0020] Particular embodiments of the methods and devices according to the invention according to the independent patent claims 1, 4, 8 and 10 to 12 result from the dependent patent claims 2, 3, 5 to 7 and 9.

[0021] In the case of the invention, various device designs are possible for the marking device used to calibrate the controls of the support drive and the positioning drive. According to the invention, a cutting device is preferred as the marking device, which generates the test workpiece markings by separating the test workpieces as recesses in the test workpieces (patent claims 2, 5). The use of a cutting device as a marking device is particularly advantageous in cases in which the synchronization of the support drive and the positioning drive serves to prepare for separating workpiece machining (patent claim 9). In this application of the invention, the cutting tool used for workpiece machining can also generate the markings on the test workpieces prior to workpiece machining.Due to the typically highly accurate position control of the cutting tools for the cutting workpiece processing, for example of laser cutting heads, the cutting tools and their drive control are particularly suitable for use in the inventive calibration of the control of the support drive and the control of the positioning drive.

[0022] In a preferred embodiment of the method according to the invention, the marking device is used both to generate the test workpiece markings and to detect the final position of the test workpiece markings (patent claim 3). For example, a laser cutting head used as a marking device can be equipped with an optical measuring device and, together with this, can move to the test workpiece markings arranged in the final position.

[0023] In the interest of simplifying the process, a further development of the positioning method according to claim 4 provides that the actual distance between the first test workpiece marking and the second test workpiece marking is measured manually (claim 6). If the test workpiece markings were created as recesses, the width of a separating web formed between the first and second recesses of the test workpiece, extending in the feed direction, is manually determined as the actual distance between the first test workpiece marking and the second test workpiece marking.

[0024] A particularly practical application of the invention is the processing of workpieces from a coil (patent claim 7). A test workpiece separate from the workpiece strip to be subsequently processed can be used for both the calibration of the control of the support drive and the calibration of the control of the positioning drive. For the calibration of the control of the positioning drive, the invention prefers to use a partial length of the workpiece strip wound into a coil as a test workpiece.

[0025] The invention is explained in more detail below using exemplary schematic representations. They show:

[0026] Figure 1 shows the processes involved in calibrating the control of a support drive as part of a first type method for synchronising a support drive and a positioning drive for positioning a sheet to be processed on a coil processing system for separating sheet metal processing,

[0027] Figure 2 shows the processes for calibrating the control of the positioning drive as part of the method according to Figure 1 for synchronising a support drive and a positioning drive of a coil processing system for separating sheet metal processing,

[0028] Figure 3 shows the processes involved in calibrating the control of a support drive as part of a second type of method for synchronising a support drive and a positioning drive for positioning a sheet to be processed on a coil processing system for separating sheet metal processing and

[0029] Figure 4 shows the processes for calibrating the positioning drive control within the framework of the method according to Figure 1 for synchronizing a support drive and a positioning drive of a coil processing system for separating sheet metal. A mechanical arrangement 1 shown in Figures 1 to 4 serves for separating a workpiece in the form of a strip-shaped sheet 2, which in an initial state is wound as a coil 3 onto a reel 4. Adjacent to the reel 4 is a conventional straightening device 5 with straightening rollers 6.

[0030] A positioning drive, designed as a feed driver 8, is used to unwind the sheet 2 from the coil 3 and to move the sheet 2 in a feed direction 7. The feed driver 8 has two feed rollers 9, which act on the sheet 2 on its top and bottom sides and drive it frictionally in the feed direction 7. The movement of the sheet 2 in the feed direction 7 generated by the feed driver 8 is detected by a measuring wheel 10 of the feed driver 8. The measuring wheel 10 is part of a programmable numerical control 11 of the feed driver 8.

[0031] The feed driver 8 is followed in the feed direction 7 by a machining device in the form of a laser cutting machine 12. A laser cutting head 13 is provided as a cutting device of the laser cutting machine 12, which can execute two-axis movements in a horizontal movement plane in the usual way in a working space 14 of the laser cutting machine 12 provided with a housing.

[0032] The movements of the laser cutting head 13 are generated by means of a device drive 15 which is provided with a programmable numerical control 16.

[0033] During its movements, the laser cutting head 13 traverses a workpiece support, which in the example shown is designed as a continuously rotating support belt 17. With its upper run designed to support the sheet metal 2, the support belt 17 is driven in the feed direction 7 by a drive wheel 18 of a support drive 19. The support drive 19 is controlled by a programmable numerical control 20.

[0034] The control 11 of the feed driver 8, the control 16 of the device control 15 for the laser cutting head 13 and the control 20 of the support drive 19 are integrated into a higher-level numerical device control 25 of the machine arrangement 1.

[0035] At the start of the cutting operation of the mechanical arrangement 1, the sheet metal 2 is moved by the feed driver 8 in the feed direction 7 into a processing position on the support belt 17. During the positioning movement of the sheet metal 2 generated by the feed driver 8, the support belt 17 also moves in the feed direction 7. This is intended to prevent slippage between the sheet metal 2 and the support belt 17. Such slippage could lead to damage, for example, to scratches on the sheet metal surface, particularly in the case of sensitive sheet metal surfaces.

[0036] To prevent slippage between the sheet metal 2 and the support belt 17 during cutting operation of the machine assembly 1, the support drive 19 and the feed driver 8 are synchronized before the sheet metal 2 is initially transferred to a processing position. For this purpose, the control 20 of the support drive 19 and the control 11 of the feed driver 8 are calibrated.

[0037] A first possibility for calibrating the control 20 of the support drive 19 and the control 11 of the feed driver 8 is illustrated in Figures 1 and 2. The calibration of the control 20 of the support drive 19 is shown in Figure 1, and the calibration of the control 11 of the feed driver 8 is shown in Figure 2.

[0038] A second possibility for calibrating the control 20 of the support drive 19 and the control 11 of the feed driver 8 is shown in Figures 3 and 4, where Figure 3 shows the calibration of the control 20 of the support drive 19 and Figure 4 shows the calibration of the control 11 of the feed driver 8.

[0039] According to Figure 1, for calibrating the control system 20 of the support drive 19, a test workpiece in the form of a test sheet metal panel 21, separate from the sheet metal 2 to be subsequently processed, is arranged on the support belt 17 with an initial position in the feed direction 7. Subsequently, by means of the laser cutting head 13 used as a marking device, a recess in the form of a test cut 22 is created on the test sheet metal panel 21 arranged in the initial position as a test workpiece marking. The resulting conditions are shown in partial illustration I of Figure 1.

[0040] With the test sheet metal panel 21 arranged in the initial position, an initial position A of the test cut 22 in the feed direction 7 is determined in a coordinate system of the control 16 of the device drive 15 of the laser cutting head 13. Subsequently, the support belt 17 is moved by the support drive 19 with a test support movement over a path length of the test support movement in the feed direction 7. Together with the support belt 17, the test sheet metal panel 21, mounted on the support belt 17 and provided with the test cut 22, moves over the path length of the test support movement to a target position. As a result, the test cut 22 reaches a final position B. The resulting conditions are shown in partial illustration II of Figure 1.

[0041] To move the test sheet metal panel 21 from the starting position to the target position, the controller 20 controls the support drive 19 based on a value stored in the controller 20 by programming the controller 20 for the pitch circle diameter of the drive wheel 18 of the support drive 19 provided as a control variable. The pitch circle diameter of the drive wheel 18 of the support drive 19 stored in the controller 20 defines a target path length of the movement of the workpiece support 17 and the movement of the test sheet metal panel 21 simultaneously generated by the support drive 19.

[0042] Once the test sheet metal panel 21 has reached the target position shown in partial illustration II of Figure 1, the end position B of the test cut 22 in the feed direction 7 is determined in the coordinate system of the controller 16 of the device drive 15 of the laser cutting head 13. For this purpose, the laser cutting head 13 moves to the test cut 22 in the feed direction 7, starting from the initial position A, using an optical measuring device of conventional design integrated into the laser cutting head 13 and not shown in the drawings. The distance between the initial position A of the test cut 22 and the end position B of the test cut 22 in the feed direction 7 in the coordinate system of the controller 16 of the device drive 15 of the laser cutting head 13 is determined as an actual path length of the movement of the test sheet metal panel 21 generated by the support drive 19.

[0043] The actual travel length and the target travel length of the movement of the test sheet metal panel 21 are then compared. If the actual travel length deviates from the target travel length of the movement of the test sheet metal panel 21 generated by the support drive 19, a correction is made to the value stored in the control system 20 of the support drive 19 for the pitch circle diameter of the drive wheel 18 of the support drive 19, which is provided as the control variable. This adjusts the actual travel length of the movement of the test sheet metal panel 21 generated by the support drive 19 to the target travel length of the movement of the test sheet metal panel 21.

[0044] The same procedure is used to calibrate the control 11 of the feed driver 8.

[0045] As shown in Figure 2, for the calibration of the control system 11 of the feed driver 8, a test length 21a of the sheet metal 2, not intended for subsequent processing, is arranged on the support belt 17 with an initial position in the feed direction 7. By means of the laser cutting head 13, a test cut 22 is created on the test length 21a of the sheet metal 2 arranged in the initial position as a test workpiece marking (partial illustration I of Figure 2).

[0046] With the test length 21a of the sheet 2 arranged in the initial position, an initial position A of the test cut 22 in the feed direction 7 is determined in a coordinate system of the control 16 of the device drive 15 of the laser cutting head 13.

[0047] Subsequently, the test length 21a of the sheet 2 is moved by means of the feed driver 8 with a test positioning movement over a path length of the test positioning movement in the feed direction 7. As a result, the test length 21a of the sheet 2 reaches a target position and the test cut 22 reaches a final position B (partial view II of Figure 2).

[0048] To move the test length 21a of the sheet metal 2 over the path length of the test positioning movement, the controller 11 controls the feed driver 8 based on a value stored in the controller 11 by programming the controller 11 for the pitch circle diameter of the measuring wheel 10 of the feed driver 8 provided as a control variable. The value programmed as a control variable for the pitch circle diameter of the measuring wheel 10 of the feed driver 8 represents a target path length of the test positioning movement of the test length 21a of the sheet metal 2, which corresponds to the target path length of the movement of the workpiece support 17 and the movement of the test sheet metal panel 21 during the calibration of the controller 20 of the support drive 19.

[0049] Once the test length 21a of the sheet metal 2 has reached the target position shown in partial illustration II of Figure 2, the end position B of the test cut 22 in the feed direction 7 is determined in the coordinate system of the controller 16 of the device drive 15 of the laser cutting head 13. For this purpose, the laser cutting head 13 also moves to the test cut 22 starting from the initial position A in the feed direction 7 using the optical measuring device integrated into the laser cutting head 13. The distance between the initial position A of the test cut 22 and the end position B of the test cut 22 in the feed direction 7 in the coordinate system of the controller 16 of the device drive 15 of the laser cutting head 13 is determined as an actual path length of the test positioning movement of the test length 21a of the sheet metal 2 generated by the feed driver 8.

[0050] The actual path length and the target path length of the test positioning movement of the test length 21a of the sheet 2 are then compared. If the actual path length deviates from the target path length of the test positioning movement of the test length 21a of the sheet 2 generated by the feed driver 8, the value stored in the control system 11 of the feed driver 8 for the pitch circle diameter of the measuring wheel 10 of the feed driver 8 is corrected to adjust the actual path length to the target path length of the test positioning movement of the test length 21a of the sheet 2 generated by the feed driver 8.

[0051] Due to the thus completed calibration of the control 20 of the feed drive 19 and the control 11 of the feed driver 8, synchronization of the sheet 2, which is moved into the processing position by the feed driver 8, and the support belt 17, which is moved in the feed direction 7 by the support drive 19 and supports the sheet 2, is ensured for the subsequent processing of the sheet 2. As part of the positioning process according to Figures 3 and 4, the control 20 of the support drive 19 is calibrated as follows, as shown in Figure 3:

[0052] As a test workpiece, a test sheet metal panel 121 is arranged with an initial position in the feed direction 7 on the support belt 17. The laser cutting head 13 is moved by means of the device drive 15 in the feed direction 7 into a first marking position M1. With a separating movement defined with respect to the first marking position M1, the laser cutting head 13 used as a marking device produces on the test sheet metal panel arranged in the initial position

[0053] 121 as a first test workpiece marking a first test recess 122.

[0054] The resulting conditions are shown in partial representation I of Figure 3.

[0055] By means of the support drive 19, the support belt 17 is now moved with a test support movement over a path length of the test support movement in the feed direction 7. Together with the support belt 17, the support belt 17, which is mounted on the support belt 17 and connected to the first test recess, moves

[0056] 122 provided test sheet metal panel 121 in the feed direction 7. The path length of the movement of the test sheet metal panel 121 in the feed direction 7 corresponds to the path length of the test support movement in the feed direction 7.

[0057] To move the test sheet metal panel 121 over the path length of the test support movement, the controller 20 controls the support drive 19 based on a value programmed in the controller 20 for the pitch circle diameter of the drive wheel 18 of the support drive 19 provided as a control variable. Based on the programmed value for the pitch circle diameter of the drive wheel 18 of the support drive 19, the support drive 19 should move the test sheet metal panel 121 over a defined target path length of the movement of the test sheet metal panel 121 generated by the support drive 19.

[0058] In the target position at the end of its movement in the feed direction 7, the test sheet metal panel 121 is shown in partial view II of Figure 3. The laser cutting head 13 is now moved by means of the device drive 15 with a device movement in the feed direction 7 over a path length of the device movement from the first marking position M1 to a second marking position M2. With a separating movement defined with respect to the second marking position M2, the laser cutting head 13 now creates a second test recess 123 on the test sheet metal panel 121 arranged in the target position, which in the case shown is identical to the first test recess 122.

[0059] The path length of the movement of the laser cutting head 13 from the first marking position M1 to the second marking position M2 in the feed direction 7 is dimensioned by appropriate programming of the controller 16 of the device drive 15 of the laser cutting head 13 on the basis of the target path length of the movement of the test sheet metal panel 121 generated by means of the support drive 19 such that the first test recess 122 and the second test recess 123 of the test sheet metal panel 121 have a target distance in a coordinate system of the controller 16 of the device drive 15 of the laser cutting head 13 in the feed direction 7.

[0060] The actual distance, i.e. the actual distance, between the first test recess 122 and the second test recess 123 on the test sheet metal panel 121 is embodied by the width b, existing in the feed direction 7, of a separating web 124 formed on the test sheet metal panel 121 between the first test recess 122 and the second test recess 123.

[0061] The actual distance between the first test recess 122 and the second test recess 123 can therefore be determined by manually measuring the width b of the separating web 124 in the example shown. The width b of the separating web 124 is compared with the target distance between the first test recess 122 and the second test recess 123 in the feed direction 7.

[0062] If, during this comparison, a deviation of the actual distance (width b of the separating web 124) from the target distance of the first test recess 122 and the second test recess 123 is detected, the value stored in the control 20 of the support drive 19 for the pitch circle diameter of the drive wheel 18 of the support drive 19 is corrected in order to adjust the actual distance of the first test recess 122 and the second test recess 123 to the target distance.

[0063] The control 11 of the feed driver 8 provided as a positioning drive is calibrated as part of the positioning process according to Figures 3 and 4 in the manner illustrated in Figure 4:

[0064] As a test workpiece, a test length 121a of sheet metal 2, not intended for subsequent processing, is arranged on the support belt 17 with an initial position in the feed direction 7. The laser cutting head 13 is moved by the device drive 15 in the feed direction 7 into a first marking position M1. With a separating movement defined with respect to the first marking position M1, the laser cutting head 13 used as a marking device creates a first test recess 122 (partial illustration I of Figure 4) on the test length 121a of sheet metal 2 arranged in the initial position as the first test workpiece marking.

[0065] By means of the feed driver 8, the test length 121a of the sheet 2 is now moved with a test positioning movement over a path length of the test positioning movement in the feed direction 7.

[0066] To move the test length 121a of the sheet 2 over the path length of the test positioning movement, the controller 11 controls the feed driver 8 based on a value programmed in the controller 11 for the pitch circle diameter of the measuring wheel 10 of the feed driver 8 provided as a control variable. Based on the programmed value for the pitch circle diameter of the measuring wheel 10 of the feed driver 8, the feed driver 8 should move the test length 121a of the sheet 2 over a defined target path length of the test positioning movement generated by the feed driver 8.

[0067] In the target position at the end of its test positioning movement in the feed direction 7, the test length 121a of the sheet metal 2 is shown in partial illustration II of Figure 4. The laser cutting head 13 is now moved by means of the device drive 15 with a device movement in the feed direction 7 over a path length of the device movement from the first marking position M1 to a second marking position M2. With a separating movement of the laser cutting head 13 defined with respect to the second marking position M2, a second test recess 123 is created on the test length 121a of the sheet metal 2 arranged in the target position.

[0068] The path length of the movement of the laser cutting head 13 from the first marking position M1 to the second marking position M2 in the feed direction 7 is dimensioned by appropriate programming of the control 16 of the device drive 15 of the laser cutting head 13 on the basis of the target path length of the movement of the test length 121a of the sheet 2 generated by means of the support drive 19 such that the first test recess 122 and the second test recess 123 of the test length 121a of the sheet 2 have a target distance in a coordinate system of the control 16 of the device drive 15 of the laser cutting head 13 in the feed direction 7.

[0069] The actual distance between the first test recess 122 and the second test recess 123 on the test sheet metal panel 121 is again determined by manually measuring the width b of a separating web 124 between the first test recess 122 and the second test recess 123. The width b of the separating web 124 is compared with the target distance between the first test recess 122 and the second test recess 123.

[0070] In the event of a deviation of the actual distance (width b of the separating web 124) from the target distance between the first test recess 122 and the second test recess 123, the value stored in the control system 11 of the feed driver 8 for the pitch circle diameter of the measuring wheel 10 of the feed driver 8 is corrected to align the actual distance between the first test recess 122 and the second test recess 123 with the target distance. Due to the resulting synchronization of the support drive 19 and the feed driver 8, slippage between the sheet 2 advanced into a processing position by the feed driver 8 and the support belt 17 supporting the sheet 2 and also moving in the feed direction 7 is excluded during the subsequent positioning of the sheet 2 for processing purposes.

Claims

Patent claims Positioning method for positioning a plate-like workpiece (2) to be machined, in particular a sheet metal to be machined, for machining by means of a machining device (12), • wherein the workpiece (2) is moved into a machining position by means of a controlled positioning drive (8) with a positioning movement in a feed direction (7) and • wherein the workpiece (2) is supported during the positioning movement on a workpiece support (17), which is moved during the positioning movement of the workpiece (2) by means of a controlled support drive (19) with a support movement in the feed direction (7), characterized in that before the positioning movement of the workpiece (2), the support drive (19) and the positioning drive (8) are synchronized by calibrating a control (20) of the support drive (19) and a control (11) of the positioning drive (8), • wherein the control (20) of the support drive (19) is calibrated, - by placing a test workpiece (21) on the workpiece support (17) with an initial position in the feed direction (7), - by producing a test workpiece marking (22) on the test workpiece (21) arranged in the initial position by means of a marking device (13), - by determining an initial position (A) of the test workpiece marking (22) in the feed direction (7) in a coordinate system of a control (16) of a device drive (15) of the marking device (13) with the test workpiece (21) arranged in the initial position, - in that the workpiece support (17) is moved by means of the support drive (19) with a test support movement over a path length of the test support movement in the feed direction (7), wherein together with the workpiece support (17) the test workpiece (21) mounted on the workpiece support (17) and provided with the test workpiece marking (22) is moved by means of the support drive (19) in the feed direction feed direction (7) and is thereby moved with a test workpiece movement over a path length of the test workpiece movement in the feed direction (7) that corresponds to the path length of the test support movement, and wherein the control (20) of the support drive (19) controls the support drive (19) to carry out the test support movement using a control variable for measuring the path length of the test support movement and the path length of the test workpiece movement generated by means of the support drive (19) as a defined target path length of the test workpiece movement generated by means of the support drive (19), - by determining an end position (B) of the test workpiece marking (22) in the feed direction (7) in the coordinate system of the control (16) of the device drive (15) of the marking device (13) with the test workpiece (21) arranged in the target position, - by determining a distance between the initial position (A) of the test workpiece marking (22) and the end position (B) of the test workpiece marking (22) in the coordinate system of the control (16) of the device drive (15) of the marking device (13) in the feed direction (7) as an actual path length of the test workpiece movement generated by means of the support drive (19), - by comparing the actual path length of the test workpiece movement generated by the support drive (19) and the target path length of the test workpiece movement generated by the support drive (19) and - in that, in the event of a deviation of the actual path length of the test workpiece movement generated by means of the support drive (19) from the target path length of the test workpiece movement generated by means of the support drive (19), a correction of the control variable for controlling the support drive (19) is carried out in the sense of an adjustment of the actual path length of the test workpiece movement generated by means of the support drive (19) to the target path length of the test workpiece movement generated by means of the support drive (19) and • whereby the control of the positioning drive (8) is calibrated, - by placing a test workpiece (21a) on the workpiece support (17) with an initial position in the feed direction (7), - by producing a test workpiece marking (22) on the test workpiece (21a) arranged in the initial position by means of a marking device (13), - by determining an initial position (A) of the test workpiece marking (22) in the feed direction (7) in a coordinate system of the control (16) of the device drive (15) of the marking device (13) with the test workpiece (21a) arranged in the initial position, - in that the test workpiece (21a) provided with the first test workpiece marking (22) is moved by means of the positioning drive (8) with a test positioning movement over a path length of the test positioning movement in the feed direction (7) into a target position, wherein the control (11) of the positioning drive (8) controls the positioning drive (8) to execute the test positioning movement based on a control variable for dimensioning the path length of the test positioning movement as a defined target path length of the test positioning movement, which corresponds to the target path length of the test workpiece movement generated by means of the support drive (19), - by determining, with the test workpiece (21a) arranged in the target position, an end position (B) of the test workpiece marking (22) in the feed direction (7) in the coordinate system of the control (16) of the device drive (15) of the marking device (13), - by determining a distance between the initial position (A) of the test workpiece marking (22) and the final position (B) of the test workpiece marking (22) in the coordinate system of the control (16) of the device drive (15) of the marking device (13) in the feed direction (7) as an actual path length of the test positioning movement, - by comparing the actual path length of the test positioning movement and the target path length of the test positioning movement and - in that, if the actual path length of the test positioning movement deviates from the target path length of the test positioning movement, a correction of the control variable for controlling the positioning drive (8) is carried out in order to adjust the actual path length of the test positioning movement to the target path length of the test positioning movement.

2. Positioning method according to claim 1, characterized in that by means of a separating device provided as a marking device (13), a recess in the test workpiece (21, 21a) is produced as a test workpiece marking (22) on the test workpiece (21, 21a) arranged in the initial position.

3. Positioning method according to claim 2 or claim 3, characterized in that with the test workpiece (21, 21a) arranged in the target position, the end position of the test workpiece marking (22) in the feed direction (7) in the coordinate system of the control (16) of the device drive (15) of the marking device (13) is determined by moving the test workpiece marking (22) by means of the device drive (15) of the marking device (13) with a detection device provided on the marking device (13).

4. Positioning method for positioning a plate-like workpiece (2) to be machined, in particular a sheet metal to be machined, for machining by means of a machining device (12), • wherein the workpiece (2) is moved into a machining position by means of a controlled positioning drive (8) with a positioning movement in a feed direction (7) and • wherein the workpiece (2) is supported during the positioning movement on a workpiece support (17), which is moved during the positioning movement of the workpiece (2) by means of a controlled support drive (19) with a support movement in the feed direction (7), characterized in that before the positioning movement of the workpiece (2), the support drive (19) and the positioning drive (8) are synchronized by calibrating a control (20) of the support drive (19) and a control (11) of the positioning drive (8), • wherein the control (20) of the support drive (19) is calibrated, - by placing a test workpiece (121) on the workpiece support (17) with an initial position in the feed direction (7), - by moving a marking device (13) into a first marking position (M1) in the feed direction (7) by means of a controlled device drive (15), - by producing a first test workpiece marking (122) on the test workpiece (121) arranged in the initial position by means of the marking device (13) arranged in a defined manner opposite the first marking position (M1), - by moving the workpiece support (17) with a test support movement over a path length of the test support movement in the feed direction (7) by means of the support drive (19),wherein, together with the workpiece support (17), the test workpiece (121) mounted on the workpiece support (17) and provided with the first test workpiece marking (122) is moved in the feed direction (7) by means of the support drive (19) and is thereby moved with a test workpiece movement over a path length of the test workpiece movement in the feed direction (7) that corresponds to the path length of the test support movement, and wherein the control (20) of the support drive (19) controls the support drive (19) to execute the test support movement using a control variable for measuring the path length of the test support movement and the test workpiece movement as a defined target path length of the test workpiece movement generated by means of the support drive (19), - by moving the marking device (13) by means of the device drive (15) with a device movement in the feed direction (7) over a path length of the device movement from the first marking position (M1) to a second marking position (M2), - by producing a second test workpiece marking (123) on the test workpiece (121) arranged in the target position by means of the marking device (13) arranged in a defined manner opposite the second marking position (M2), - by means of the control (16) of the device drive (15) of the marking device (13), the path length of the device movement is dimensioned on the basis of the target path length of the test workpiece movement generated by means of the support drive (19) in such a way that the first test workpiece marking (122) and the second test workpiece marking (123) have a target distance in a coordinate system of the control (16) of the device drive (15) of the marking device (13) in the feed direction (7), - by determining an actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) as the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) in the feed direction (7), - by comparing the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) and the target distance between the first test workpiece marking (122) and the second test workpiece marking (123) with each other, and - in that, in the event of a deviation of the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) from the target distance between the first test workpiece marking (122) and the second test workpiece marking (123), a correction of the control variable for controlling the support drive (19) is carried out in the sense of an adjustment of the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) to the target distance between the first test workpiece marking (122) and the second test workpiece marking (123) and • wherein the control (11) of the positioning drive (8) is calibrated, - by placing a test workpiece (121a) on the workpiece support (17) with an initial position in the feed direction (7), - by moving a marking device (13) into a first marking position (M1) in the feed direction (7) by means of a controlled device drive (15), - by producing a first test workpiece marking (122) on the test workpiece (121a) arranged in the initial position by means of the marking device (13) arranged in a defined manner opposite the first marking position (Ml), - by moving the test workpiece (121a) provided with the first test workpiece marking (122) into a target position by means of the positioning drive (8) with a test positioning movement over a path length of the test positioning movement in the feed direction (7), wherein the control (11) of the positioning drive (8) controls the positioning drive (8) to execute the test positioning movement based on a control variable for dimensioning the path length of the test positioning movement as a defined target path length of the test positioning movement, which corresponds to the defined target path length of the test workpiece movement generated by means of the support drive (19), - by moving the marking device (13) by means of the device drive (15) with a device movement in the feed direction (7) over a path length of the device movement from the first marking position (M1) to a second marking position (M2), - by producing a second test workpiece marking (123) on the test workpiece (121a) arranged in the target position by means of the marking device (13) arranged in a defined manner opposite the second marking position (M2), - by means of the control (16) of the device drive (15) of the marking device (13) the path length of the device movement on the basis of the target path length of the support drive (19) generated test workpiece movement is dimensioned such that the first test workpiece marking (122) and the second test workpiece marking (123) have a desired distance in a coordinate system of the control (16) of the device drive (15) of the marking device (13) in the feed direction (7), - by determining an actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) as the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123), - by comparing the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) and the target distance between the first test workpiece marking (122) and the second test workpiece marking (123) with each other, and - in that, if the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) deviates from the target distance between the first test workpiece marking (122) and the second test workpiece marking (123), a correction of the control variable for controlling the positioning drive (8) is carried out in the sense of an adjustment of the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) to the target distance between the first test workpiece marking (122) and the second test workpiece marking (123). Positioning method according to claim 4, characterized in • that by means of a separating device provided as a marking device (13), a first recess of the test workpiece (121, 121a) is produced as a first test workpiece marking (122) on the test workpiece (121, 121a) arranged in the starting position and a second recess of the test workpiece (121, 121a) is produced as a second test workpiece marking (123) on the test workpiece (121, 121a) arranged in the target position, • that by means of the control (16) of the device drive (15) of the marking device (13) the path length of the device movement on the Based on the target path length of the test workpiece movement generated by means of the support drive (19), it is dimensioned such that a separating web (124) is generated between the first recess (122) of the test workpiece (121, 121a) and the second recess (123) of the test workpiece (121, 121a) with a target width forming the target distance between the first recess (122) of the test workpiece (121, 121a) and the second recess (123) of the test workpiece (121, 121a) in the feed direction (7), • that an actual width of the separating web (124) between the first recess (122) of the test workpiece (121, 121a) and the second recess (123) of the test workpiece (121, 121a) is determined as the actual width (b) of the separating web (124), • that the actual width (b) of the separating web (124) and the desired width of the separating web (124) are compared with each other and • that if the actual width (b) of the separating web (124) deviates from the desired width of the separating web (124), a correction of the control variable for controlling the positioning drive (8) is carried out in the sense of an adjustment of the actual width (b) of the separating web (124) to the desired width of the separating web (124).

6. Positioning method according to claim 4 or claim 5, characterized in that the actual distance of the first test workpiece marking (122) and the second test workpiece marking (123) is determined as the actual distance of the first test workpiece marking (122) and the second test workpiece marking (123) by determining the actual distance of the first test workpiece marking (122) and the second test workpiece marking (123) is measured manually.

7. Positioning method according to one of the preceding claims for positioning a plate-like workpiece (2) unwound from a coil (3), in particular a sheet unwound from a coil (3), characterized in that • that for the calibration of the control (20) of the support drive (19) a workpiece separated from the coil (3) is used as a test workpiece (21, 121) and • that for calibrating the control (11) of the positioning drive (8), a partial length of the coil (3) connected to a remaining coil (3) is used as a test workpiece (21a, 121a). Machining method for machining a plate-like workpiece (2), in particular a sheet metal, by means of a machining device (12), wherein the workpiece (2) is positioned in a working area (14) of the machining device (12) prior to machining using a positioning method, within the scope of which the workpiece (2) • is moved into a processing position by means of a controlled positioning drive (8) with a positioning movement in a feed direction (7) and • is mounted on a workpiece support (17) during the positioning movement, which is moved during the positioning movement of the workpiece (2) by means of a controlled support drive (19) with a support movement in the feed direction (7), characterized in that the positioning method is designed according to one of the preceding claims.Machining method according to claim 8 for the separating machining of a plate-like workpiece (2), in particular a sheet metal, by means of a separating tool, wherein the positioning method is designed according to claim 2 or claim 5, characterized in that the separating tool for separating workpiece machining is used as the separating device for producing the test workpiece marking (22) on the test workpiece (121, 121a) arranged in the starting position or as the separating device for producing the first test workpiece marking (122) on the test workpiece (121, 121a) arranged in the starting position and the second test workpiece marking (123) on the test workpiece (121, 121a) arranged in the target position. Positioning device for positioning a plate-like workpiece (2) to be machined, in particular a sheet metal to be machined, for machining by means of a machining device (12), • with a positioning drive (8), by means of which the workpiece (2) can be moved into a processing position with a positioning movement in a feed direction (7), • with a workpiece support (17) on which the workpiece (2) can be supported during the positioning movement and which has a support drive (19) by means of which the workpiece support (17) can be moved with a support movement in the feed direction (7) during the positioning movement of the workpiece (2) and • with a numerical device control (25) comprising a control (20) of the support drive (19) of the workpiece support (17) and a control (11) of the positioning drive (8), characterized in that before the positioning movement of the workpiece (2), the support drive (19) and the positioning drive (8) can be synchronized by calibrating a control (20) of the support drive (19) and a control (11) of the positioning drive (8), • wherein the control (20) of the support drive (19) is calibrated, - by placing a test workpiece (21) on the workpiece support (17) with an initial position in the feed direction (7), - by producing a test workpiece marking (22) on the test workpiece (21) arranged in the initial position by means of a marking device (13), - by determining an initial position (A) of the test workpiece marking (22) in the feed direction (7) in a coordinate system of a control (16) of a device drive (15) of the marking device (13) with the test workpiece (21) arranged in the initial position, - by moving the workpiece support (17) with a test support movement over a path length of the test support movement in the feed direction (7) by means of the support drive (19), wherein the test workpiece (21) mounted on the workpiece support (17) and provided with the test workpiece marking (22) is moved in the feed direction (7) by means of the support drive (19) together with the workpiece support (17) and is thereby moved with a test workpiece movement over a path length of the test workpiece movement in the feed direction (7) that corresponds to the path length of the test support movement, and wherein the control of the support drive (20) controls the support drive (19) to execute the test support movement based on a control variable for measuring the path length of the test support movement and the path length of the test workpiece movement generated by means of the support drive (19) as a defined target path length of the test workpiece movement generated by means of the support drive (19), - by determining an end position (B) of the test workpiece marking (22) in the feed direction (7) in the coordinate system of the control (16) of the device drive (15) of the marking device (13) with the test workpiece (21) arranged in the target position, - by determining a distance between the initial position (A) of the test workpiece marking (22) and the end position (B) of the test workpiece marking (22) in the coordinate system of the control (16) of the device drive (15) of the marking device (13) in the feed direction (7) as an actual path length of the test workpiece movement generated by means of the support drive (19), - by comparing the actual path length of the test workpiece movement generated by the support drive (19) and the target path length of the test workpiece movement generated by the support drive (19) and - in that, in the event of a deviation of the actual path length of the test workpiece movement generated by means of the support drive (19) from the target path length of the test workpiece movement generated by means of the support drive (19), a correction of the control variable for controlling the support drive (19) is carried out in the sense of an adjustment of the actual path length of the test workpiece movement generated by means of the support drive (19) to the desired path length of the test workpiece movement generated by the support drive (19) and • wherein the control (11) of the positioning drive (8) is calibrated, - by placing a test workpiece (21a) on the workpiece support (17) with an initial position in the feed direction (7), - by producing a test workpiece marking (22) on the test workpiece (21a) arranged in the initial position by means of a marking device (13), - by determining an initial position of the test workpiece marking (22) in the feed direction (7) in a coordinate system of the control (16) of the device drive (15) of the marking device (13) with the test workpiece (21a) arranged in the initial position, - in that the test workpiece (21a) provided with the first test workpiece marking (22) is moved by means of the positioning drive (8) with a test positioning movement over a path length of the test positioning movement in the feed direction (7) into a target position, wherein the control (11) of the positioning drive (8) controls the positioning drive (8) to execute the test positioning movement based on a control variable for dimensioning the path length of the test positioning movement as a defined target path length of the test positioning movement, which corresponds to the target path length of the test workpiece movement generated by means of the support drive (19), - by determining, with the test workpiece (21a) arranged in the target position, an end position of the test workpiece marking (22) in the feed direction (7) in the coordinate system of the control (16) of the device drive (15) of the marking device (13), - by determining a distance between the initial position (A) of the test workpiece marking (22) and the final position (B) of the test workpiece marking (22) in the coordinate system of the control (16) of the device drive (15) of the marking device (13) in the feed direction (7) as an actual path length of the test positioning movement, - by comparing the actual path length of the test positioning movement and the target path length of the test positioning movement and - in that, if the actual path length of the test positioning movement deviates from the target path length of the test positioning movement, a correction of the control variable for controlling the positioning drive (8) is made in order to adjust the actual path length of the test positioning movement to the target path length of the test positioning movement. Positioning device for positioning a plate-like workpiece (2) to be machined, in particular a sheet metal workpiece, for machining by means of a machining device (12), • with a positioning drive (8), by means of which the workpiece (2) can be moved into a processing position with a positioning movement in a feed direction (7), • with a workpiece support (17) on which the workpiece (2) can be supported during the positioning movement and which has a support drive (19) by means of which the workpiece support (17) can be moved with a support movement in the feed direction (7) during the positioning movement of the workpiece (2) and • with a numerical device control (25) which provides a control (20) of the support drive (19) of the workpiece support (17) and a control (11) of the positioning drive (8), characterized in that before the positioning movement of the workpiece (2), the support drive (19) and the positioning drive (8) can be synchronized by calibrating a control (20) of the support drive (19) and a control (11) of the positioning drive (8), • wherein the control (20) of the support drive (19) is calibrated, - by placing a test workpiece (121) on the workpiece support (17) with an initial position in the feed direction (7), - by moving a marking device (13) into a first marking position (M1) in the feed direction (7) by means of a controlled device drive (15), - by applying a first test workpiece marking to the test workpiece (121) arranged in the initial position by means of the marking device (13) arranged in a defined manner opposite the first marking position (M1) (122) is generated, - by moving the workpiece support (17) with a test support movement over a path length of the test support movement in the feed direction (7) by means of the support drive (19),wherein, together with the workpiece support (17), the test workpiece (121) mounted on the workpiece support (17) and provided with the first test workpiece marking (122) is moved in the feed direction (7) by means of the support drive (19) and is thereby moved with a test workpiece movement over a path length of the test workpiece movement in the feed direction (7) that corresponds to the path length of the test support movement, and wherein the control (20) of the support drive (19) controls the support drive (19) to execute the test support movement using a control variable for measuring the path length of the test support movement and the test workpiece movement as a defined target path length of the test workpiece movement generated by means of the support drive (19), - by moving the marking device (13) by means of the device drive (15) with a device movement in the feed direction (7) over a path length of the device movement from the first marking position (M1) to a second marking position (M2), - by applying a second test workpiece marking to the test workpiece (121) arranged in the target position by means of the marking device (13) arranged in a defined manner opposite the second marking position (M2) (123) is generated, - by means of the control (16) of the device drive (15) of the marking device (13) the path length of the device movement on the basis of the target path length of the support drive (19) generated test workpiece movement is dimensioned such that the first test workpiece marking (122) and the second test workpiece marking (123) have a desired distance in a coordinate system of the control (16) of the device drive (15) of the marking device (13) in the feed direction (7), - by determining an actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) as the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) in the feed direction (7), - by comparing the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) and the target distance between the first test workpiece marking (122) and the second test workpiece marking (123) with each other, and - in that, in the event of a deviation of the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) from the target distance between the first test workpiece marking (122) and the second test workpiece marking (123), a correction of the control variable for controlling the support drive (19) is carried out in the sense of an adjustment of the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) to the target distance between the first test workpiece marking (122) and the second test workpiece marking (123) and • wherein the control (11) of the positioning drive (8) is calibrated, - by placing a test workpiece (121a) on the workpiece support (17) with an initial position in the feed direction (7), - by moving a marking device (13) into a first marking position (M1) in the feed direction (7) by means of a controlled device drive (15), - by producing a first test workpiece marking (122) on the test workpiece (121a) arranged in the initial position by means of the marking device (13) arranged in a defined manner opposite the first marking position (Ml), - by moving the test workpiece (121a) provided with the first test workpiece marking (122) into a target position by means of the positioning drive (8) with a test positioning movement over a path length of the test positioning movement in the feed direction (7), wherein the control (11) of the positioning drive (8) controls the positioning drive (8) to execute the test positioning movement based on a control variable for dimensioning the path length of the test positioning movement as a defined target path length of the test positioning movement, which corresponds to the defined target path length of the test workpiece movement generated by means of the support drive (19), - by moving the marking device (13) by means of the device drive (15) with a device movement in the feed direction (7) over a path length of the device movement from the first marking position (M1) to a second marking position (M2), - by producing a second test workpiece marking (123) on the test workpiece (121a) arranged in the target position by means of the marking device (13) arranged in a defined manner opposite the second marking position (M2), - by means of the control (16) of the device drive (15) of the marking device (13), the path length of the device movement is dimensioned on the basis of the target path length of the test workpiece movement generated by means of the support drive (19) in such a way that the first test workpiece marking (122) and the second test workpiece marking (123) have a target distance in a coordinate system of the control (16) of the device drive (15) of the marking device (13) in the feed direction (7), - by determining an actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) as the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123), - by determining the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) and the target distance between the first test workpiece marking (122) and the second test workpiece marking (123) are compared with each other and - in that, if the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) deviates from the target distance between the first test workpiece marking (122) and the second test workpiece marking (123), a correction of the control variable for controlling the positioning drive (8) is carried out in order to adjust the actual distance between the first test workpiece marking (122) and the second test workpiece marking (123) to the target distance between the first test workpiece marking (122) and the second test workpiece marking (123). A mechanical arrangement for machining a plate-like workpiece (2), in particular a sheet metal, • with a machining device (12) which has a working area (14) with a workpiece support (17) on which the workpiece (2) can be stored in a machining position during machining, and • with a positioning device (8) by means of which the workpiece (2) can be moved into the processing position on the workpiece support (17) before processing, characterized in that the positioning device according to claim 10 or the positioning device according to claim 11 is provided as the positioning device.

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