METHOD FOR MACHINING WORKPIECES, COMPUTER PROGRAM PRODUCT, AND WORKPIECE MACHINING SYSTEM

Description

[0001] The invention relates to a method for machining workpieces according to the preamble of main claim 1. Such a method is known from document WO 99 / 33600 A1.

[0002] The invention also relates to a computer program product and a workpiece machining system according to the preambles of the independent patent claims.

[0003] For example, from DE 10 2015 206 824 A1 it is known to divide a large-format plate-shaped workpiece by means of a first cut, a second cut, and a final cut. The first cut is also referred to as a longitudinal cut, and the second cut as a cross-cut. The longitudinal cut divides the plate-shaped workpiece into a plurality of strip-shaped workpieces. The strip-shaped workpieces are then further divided into a first partial workpiece and a second partial workpiece by means of at least one cross-section transverse to their longitudinal direction. In order to produce a final workpiece which does not have dimensions corresponding to the width of the strip-shaped workpiece, the second partial workpiece is rotated by 90°, for example, and divided into a third partial workpiece and a fourth partial workpiece by means of the said final cut.

[0004] In the device known from DE 10 2015 206 824 A1, the workpieces are positioned relative to a sawing line by a positioning device in the form of a program slide with collets that grip the workpieces. First, all longitudinal cuts are made. The divided workpieces are then gripped again by the program slide and divided by all necessary cross-cuts. The resulting workpieces are rotated by 90°, if necessary, and then gripped again by the program slide and divided by the subsequent cuts.

[0005] EP 2 422 944 A1 describes a method in which a board is divided by a plurality of first cuts, second cuts, and third cuts. WO 2015 / 135686 A1 describes a method in which adjacent board strips are divided.

[0006] The present invention has the object of providing a method, a computer program product and a workpiece processing system which enable the most complete possible processing of workpieces in a very simple manner and without great loss of time.

[0007] This object is achieved by a method having the features of the main claim and by a workpiece machining system having the features of the subordinate patent claims. Advantageous developments are specified in the subclaims. Furthermore, further features essential to the invention can be found in the following description and the drawings. These features can be essential to the invention both individually and in various combinations, without this being explicitly mentioned again in individual cases.

[0008] The invention initially relates to a method for operating a workpiece machining system. In a first method step, a workpiece held by a positioning device, for example, a gantry-type program slide with collets, and lying, for example, on a feed table, in particular a roller table and / or an air cushion table, is divided into a first partial workpiece and at least one second partial workpiece. The division is performed, for example, by a saw that can be moved on a saw carriage transversely to the direction of movement of the positioning device.

[0009] In a second process step, the second partial workpiece is machined. If multiple second partial workpieces have been produced, this means that only one of these second partial workpieces is machined, and that (preferably one after the other) some, but not all, of the second partial workpieces, or all of the second partial workpieces, are machined, even though, for reasons of grammatical simplification, "the or a second partial workpiece" will always be referred to in the singular below.

[0010] For this machining, the second partial workpiece must be positioned as precisely as possible relative to a machining device. This is made possible according to the invention in that the first partial workpiece produced in the first process step continues to be held by the positioning device in the second process step. According to the invention, the first partial workpiece is positioned by the positioning device for machining the second partial workpiece in the second process step in such a way that it serves as a stop for positioning the second partial workpiece in the second process step. The term "stop" should not be understood in a restrictive manner to mean that the second partial workpiece is positioned in only one direction.The division during the first process step generally produces a straight edge parallel to a cutting line on the first and second partial workpieces, which edge can also be used for a corresponding angular positioning of the second partial workpiece on the first partial workpiece.

[0011] The invention further relates to a workpiece processing system, in particular a panel dividing system for dividing panel-shaped workpieces. Such a system comprises a control and regulating device with a processor and a memory and is designed to carry out the method described above.

[0012] According to the invention, the second method step takes place at a time when a workpiece, namely the first partial workpiece, is still held by the positioning device, and not, as previously, only when the positioning device is free again and the second partial workpiece can be gripped or held by the positioning device again for processing in the second method step. Instead, the exact positioning of the second partial workpiece is made possible in the invention by the positioning device and the first partial workpiece still held by it creating a stop that is precisely positioned for the specific processing of the second partial workpiece, against which the second partial workpiece can be placed, for example, by an operator or by a mechanical handling device, for example a robot.

[0013] It is understood that if several second partial workpieces are produced in the first process step, it is possible for this to be machined in the second process step immediately after the production of a second partial workpiece and for this purpose the first partial workpiece is positioned accordingly, but it is also possible for all second partial workpieces to be produced first and for these or individual ones thereof to then be machined one after the other in the second process step and for this purpose each time be positioned accordingly in relation to the remaining first partial workpiece.

[0014] The invention significantly simplifies and accelerates processing in the second process step, as the potentially time-consuming insertion of the second partial workpiece into the positioning device is no longer necessary. Instead of, as was previously the case, virtually mandatory only performing the second process step once all initial process steps on the workpiece have been completed, the present invention allows the second process step to be performed on a partial workpiece, virtually "just-in-time," immediately after an initial process step on the workpiece, before the subsequent initial process steps on the workpiece are performed. This reduces the need for intermediate storage of partially machined workpieces or may even be eliminated entirely.It is understood that after a second process step on the partial workpiece, a first process step can be carried out on the workpiece and then a second process step on another partial workpiece, etc.

[0015] In a first development of the method according to the invention, it is proposed that the machining of the second partial workpiece in the second method step comprises a division into a third partial workpiece and a fourth partial workpiece and / or the introduction of at least one groove and / or at least one bore. The advantages are particularly pronounced when the second partial workpiece is further divided into a third partial workpiece and a fourth partial workpiece (and optionally further partial workpieces). However, the invention also yields considerable advantages in the other types of machining mentioned. With a suitably equipped workpiece machining system, complete machining can also be carried out within the second method step insofar as both a division is carried out and grooves and bores are introduced.For each machining operation, the first partial workpiece, which is still held by the positioning device, is positioned accordingly and used as a stop or positioning device.

[0016] It is further proposed that the positioning of the second partial workpiece during the second process step be dependent on the position of the groove(s) and / or the at least one bore. This means that the type of positioning on the first partial workpiece takes into account which second process steps are to follow a predetermined machining sequence.

[0017] It is also possible for the second partial workpiece to be rotated between the first and second process steps, preferably by 90°. Particularly when the machining in the second process step includes dividing, for example, using a saw, so-called "recuts" can be realized in this way, i.e., workpieces are produced whose width is smaller than the width of the first and second partial workpieces. However, even in machining that includes the creation of at least one groove and / or at least one bore, this significantly increases the flexibility of the machining. In the simplest case, the rotation will be 90°. However, other angles are also conceivable, particularly if a corresponding additional positioning device that enables precise angular positioning is available. In the simplest case, this can consist of an optical marking.

[0018] As already mentioned above, it can also be realized according to the invention that in the second process step the second partial workpiece is machined several times, in particular divided, and for this purpose the first partial workpiece is repositioned several times.

[0019] It is also advantageous if the cutting is carried out using a saw, a milling cutter, a laser cutter, or a waterjet cutter. These devices are easy to implement and allow for very precise cutting of a workpiece.

[0020] The invention may also include dividing an initial workpiece into a plurality of workpieces prior to the first process step, at least one of which is then further divided in the first process step and processed, in particular divided, in the second process step, preferably several of which are further divided in the first process step and processed, in particular divided, in the second process step. In addition to the first process step and the second process step, there is thus a "zeroth" process step, so to speak, in which the workpiece, in particular the plate strip, which is divided in the first process step, is first created from an initial workpiece. This process allows for particularly complete division or processing starting from an initial workpiece.

[0021] The further development goes in the same direction, in which, after the second process step, the first partial workpiece, which is still held by the positioning device, is machined, in particular divided, in a third process step.

[0022] The advantages of the method according to the invention are particularly evident when a plate-shaped workpiece, in particular an initially large-format plate-shaped workpiece, is divided or processed by the method. Such division or processing occurs, for example, in the manufacture of furniture parts, including kitchen furniture. The plate-shaped workpieces can be made of wood, a pressboard material, or a plastic material, for example. In principle, however, the method is also possible for other plate-shaped workpieces, such as metal plates.

[0023] A further development of the invention provides that the first partial workpiece is positioned for dividing the second partial workpiece in the second process step such that a region of the second partial workpiece adjacent to the first partial workpiece is a final workpiece, and a region of the second partial workpiece remote from the first partial workpiece is a waste piece. Since such a waste piece is usually a relatively narrow strip, it can be grasped and disposed of relatively easily by an operator in this case.

[0024] Alternatively, it is also possible to position the first partial workpiece for dividing the second partial workpiece in the second process step such that an area of the second partial workpiece adjacent to the first partial workpiece is a waste piece, and an area of the second partial workpiece remote from the first partial workpiece is a final workpiece. This variant is preferred because the stop surface of the first workpiece is closer to the cutting line on the machine table.

[0025] It is also possible for the first partial workpiece to be positioned for dividing the second partial workpiece in the second process step such that a region of the second partial workpiece adjacent to the first partial workpiece is a first final workpiece, and a region of the second partial workpiece remote from the first partial workpiece is a second final workpiece. This has the advantage that two final workpieces are created simultaneously.

[0026] The invention is explained below with reference to the accompanying drawings. In the drawings: Figures 1-23 show a plan view of a workpiece processing system in the form of a panel dividing system at different times during its operation; and Figure 24 shows a flow diagram of a method for operating the workpiece processing system of the Figure 1-23

[0027] It should be noted at this point that for reasons of simplification in the Figure 1-23 In general, only those reference symbols are shown that are considered particularly useful for understanding the respective figure. Furthermore, it should be noted that functionally equivalent elements and areas in the following figures bear the same reference symbols.

[0028] A workpiece processing system contributes to the Figure 1-23overall the reference number 10. This is an example of a panel dividing saw which is similar to one from the German patent application DE 10 2008 034 050 A1, there Figure 2 , or the German laid-open specification DE 10 2015 206 824 A1, for example Figure 1 , basically known and described in detail design.

[0029] It comprises a feed table 12, which in this case is constructed from a plurality of roller rails 14. Adjacent to the feed table 12 is a machine table 16, which in this case is constructed as an air cushion table and in which a saw gap is present, which is drawn here in simplified form as a line with the reference number 18. Below the machine table 16 there is a saw carriage (not visible in the drawing), which is motor-driven and can be moved longitudinally to the saw gap 18 and which comprises a motor-driven sawing device, preferably with a circular saw blade and a scoring unit. The circular saw blade and the scoring unit are vertically movable and can be moved through the saw gap 18 above the plane of the machine table 16. As will be explained in more detail below, a workpiece lying on the machine table 16 can be divided longitudinally to the saw gap 18.

[0030] Adjacent to the machine table 16 is a removal table 20 consisting of three segments, which is also preferably designed as an air cushion table. For the sake of simplicity, only one of the segments is provided with a reference symbol in the drawing. It should also be mentioned that a pressure beam is arranged above the machine table 16, although this is not shown in the drawing. This pressure beam can be lowered vertically to the plane of the machine table 16 by means of a drive (not shown), whereby a workpiece lying on the machine table 16 is clamped between the machine table 16 and the pressure beam. This securely holds the workpiece while it is being machined by the sawing device described above.

[0031] The workpiece machining system 10 also includes a positioning device 22, which in this case comprises a portal-like program slide. A plurality of preferably pneumatically actuated collets 24 are provided on this. The program slide 22 is mounted on lateral rails 26 so as to be movable by motor, as indicated by the double arrow 28, which, however, for the sake of simplicity, is only shown in Figure 1 is marked.

[0032] The workpiece processing system 10 also includes a Figure 1The control and regulating device 29 is shown. This in turn comprises a processor 29a and a memory 29b. The control and regulating device 29 receives signals from various sensors of the workpiece processing system 10, which are not shown. In addition, the control and regulating device 29 sends signals to various actuating devices, also not shown, such as drives of the positioning device 22 and the collets 24, drives of the sawing device, drive of the pressure beam, etc.

[0033] By means of the workpiece processing system 10, as will be explained below, an initial workpiece 30 ( Figure 1) into a plurality of partial workpieces. The starting workpiece 30 in this case is a large-format panel, for example made of a pressboard material, wood, plastic, or metal. It is also conceivable that the starting workpiece 30 is not a single panel, but a stack of several panels.

[0034] In respective "zero" process steps, the initial workpiece 30 is divided into strip-shaped workpieces 32-36 ("longitudinal cut"), in respective "first" process steps, it is divided into first partial workpieces 38-42 and second partial workpieces 44-50 ("cross-cut"). In respective "second" process steps, the second partial workpieces 44-50 are machined again, resulting in third and final partial workpieces 56-62 ("recut"), as will be explained below. Fourth partial workpieces or waste parts that arise during the individual dividing processes are generally designated by reference numeral 52 in the drawing. They will not be mentioned again in detail in the following description.

[0035] In Figure 1The initial workpiece 30 is positioned by the positioning device 22 relative to the saw gap 18 so that a so-called trimming cut can be performed. This creates a straight edge on a longitudinal edge of the initial workpiece 30.

[0036] In Figure 2 the starting workpiece 30 is moved further in the direction of the saw gap 18 by the positioning device 22 and positioned so that the first strip-shaped workpiece 32 can be separated.

[0037] In Figure 3 The first strip-shaped workpiece 32 has been moved to the upper segment of the removal table 20 in the figures. At the same time, the starting workpiece 30 has been moved further toward the saw gap 18 by the positioning device 22 and positioned so that the second strip-shaped workpiece 34 can be cut off.

[0038] Out of Figure 4It can be seen that the second strip-shaped workpiece 34 is temporarily stored on the two lower segments of the removal table 20, while the starting workpiece 30 is transported further in the direction of the saw gap 18 by the positioning device 22. A further trimming cut is now performed on the other longitudinal edge of the starting workpiece 30, creating the third strip-shaped workpiece 36.

[0039] According to Figure 5 The third strip-shaped workpiece 36 is also temporarily stored on the two lower segments of the removal table 20 in the figures. The creation of the three strip-shaped workpieces 32, 34, and 36 belongs to a "zeroth" process step, as already mentioned above.

[0040] The first strip-shaped workpiece 32 is placed on an angle ruler (not visible in the drawing), which is provided on the upper edge of the feed table 12 and the machine table 16 in the figures and which runs longitudinally to the direction of movement of the positioning device 22 according to the double arrow 28, and is gripped at its left edge in the figures by a collet 24 of the positioning device 22 and pulled back onto the feed table 12. It is first positioned so that a trimming cut can be made, whereby an edge of the strip-shaped workpiece 32 facing the feed table 12 runs exactly straight and at a right angle to the longitudinal edges of the strip-shaped workpiece 32 and a first waste part 52 is produced.

[0041] According to Figure 6In a first process step, the strip-shaped workpiece 32 is divided into a first partial workpiece 38 held by the positioning device 22 and a second partial workpiece 44 separate therefrom.

[0042] The second partial workpiece 44 is now, as shown Figure 7 can be seen, rotated by 90° about a vertical axis running perpendicular to the plane of the drawing. At the same time, the first partial workpiece 38 produced in the first process step continues to be held by the positioning device 22 during the second process step which now begins and is moved back into Figure 7 positioned to the left according to arrow 54. As a result, an edge 63 of the first partial workpiece 38 located in the direction of the removal table 20 can now serve as a stop or as a positioning device for the positioning of the second partial workpiece 38.

[0043] In Figure 8It is shown that the second partial workpiece 44 was placed against the edge 63 of the first partial workpiece 38 facing the removal table 20. At the same time, the second partial workpiece 44 was also placed against the angle ruler mentioned above but not shown. Now, in a second process step, the second partial workpiece 44 is machined by dividing it into a third and final partial workpiece 56 and a fourth partial workpiece, which forms a waste part 52.

[0044] In principle, it would also be conceivable for the machining of the second partial workpiece 44 in the second process step not to include, or not only to include, a division, but alternatively or additionally also to include the machining of at least one groove and / or the machining of at least one bore. For this purpose, the workpiece machining system 10 would have to be equipped with appropriate equipment, for example, a milling unit and / or a drilling unit.

[0045] One recognizes Figure 8 that the first partial workpiece 38 has been positioned by the positioning device 22 such that an area of the second partial workpiece 44 adjacent to the first partial workpiece 38 becomes the waste part 52, whereas the area of the second partial workpiece 44 remote from the first partial workpiece 38 forms the third and final partial workpiece 56.

[0046] In Figure 9 an alternative positioning of the first partial workpiece 38 by the positioning device 22 is shown: in this case, the area of the second partial workpiece 44 adjacent to the first partial workpiece 38 is the third and final partial workpiece 56, whereas the area of the second partial workpiece 44 remote from the first partial workpiece 38 is the waste part 52.

[0047] Out of Figure 10It can be seen that after the second process step, the positioning device 22 is moved towards the saw gap 18, whereby the first partial workpiece 38 pushes the resulting third partial workpiece 56 and the waste part 52 onto the upper segment of the removal table 20 in the figures, so that the third partial workpiece 56 can be removed there by an operator and, for example, stacked, whereas the waste part 52 can be disposed of. The first partial workpiece 38 is positioned such that its rear edge can also be machined by a trimming cut, creating a further waste part 52. This trimming cut belongs to a third process step.

[0048] In Figure 11The process described above in connection with the strip-shaped workpiece 32 now begins to be repeated with the strip-shaped workpiece 34: for this purpose, the strip-shaped workpiece 34 is moved from the intermediate storage on the two lower segments of the removal table 20, for example by an operator, to the upper segment of the removal table 20 in the figures, aligned with its longitudinal edge on the angle ruler, gripped by the collets 24 of the positioning device 22 and in Figure 11 pulled back to the left onto the feed table 12. It is positioned so that a trimming cut can first be carried out, which in turn creates a waste part 52.

[0049] In Figure 12 the strip-shaped workpiece 34 is moved by the positioning device 22 towards the saw gap 18 and positioned so that a first partial workpiece 40 with the edge 63 and a second partial workpiece 46 are created (first process step).

[0050] The second partial workpiece 46 is Figure 13 rotated by 90°, and the first partial workpiece 40 is repositioned by means of the positioning device 22.

[0051] In Figure 14 the turned second partial workpiece 46 is placed on the edge 63 of the first partial workpiece 40 (and on the angle ruler not shown) and cut, so that the third and final partial workpiece 58 and a waste part 52 are created (second process step).

[0052] By moving the positioning device 22 in the direction of the removal table 20, Figure 15 The third and final partial workpiece 58 and the waste part 52 are pushed onto the removal table 20 and removed. Furthermore, the movement repositions the first partial workpiece 40 so that a further second partial workpiece 48 can be separated (new first process step).

[0053] According to Figure 16the further second partial workpiece 48 is rotated by 90° and the first partial workpiece 40 is withdrawn from the positioning device 22 and repositioned.

[0054] Out of Figure 17 it can be seen that the rotated second partial workpiece 48 is placed against the first partial workpiece 40, which is still held by the positioning device 22, and is machined by cutting, whereby the further third and final partial workpiece 60 and a further waste part 52 are created (new second process step).

[0055] In Figure 18 it is shown that the remaining first partial workpiece 40, which is still held by the positioning device 22, is positioned in such a way that a trimming cut can be carried out on its rear edge, whereby a further waste part 52 is created (third process step).

[0056] In Figure 19The process described above in connection with the strip-shaped workpiece 34 now begins to be repeated with the strip-shaped workpiece 36: for this purpose, the strip-shaped workpiece 36 is moved from the intermediate storage on the two lower segments of the removal table 20 to the upper segment of the removal table 20 in the figures, aligned with its longitudinal edge on the angle ruler, gripped by the collets 24 of the positioning device 22 and in Figure 19 pulled to the left onto the feed table 12. It is positioned so that a trimming cut can first be carried out, creating a waste part 52.

[0057] In Figure 20 the strip-shaped workpiece 34 is moved by the positioning device 22 towards the saw gap 18 and positioned so that a first partial workpiece 42 with the edge 63 and a second partial workpiece 50 are created (first process step).

[0058] The second partial workpiece 50 is Figure 21 rotated by 90°, and the first partial workpiece 42 is repositioned by means of the positioning device 22.

[0059] In Figure 22 the turned second partial workpiece 50 is placed against the edge 63 of the first partial workpiece 42 (and against the angle ruler not shown) and cut, so that the third and final partial workpiece 62 and a waste part 52 are created (second process step).

[0060] By moving the positioning device 22 in the direction of the removal table 20, Figure 23 The third and final partial workpiece 62 and the waste part 52 are pushed onto the removal table 20 and removed. Furthermore, the movement repositions the first partial workpiece 40 so that a trimming cut can be performed, through which another waste part 52 is separated (third process step).

[0061] It was described above that in the respective second process steps, the respective second partial workpieces 44-50 are only ever machined once, namely they are divided once into the then resulting third and final partial workpieces 56-62 and corresponding waste parts. In principle, however, it is also conceivable that in at least one of the second process steps, the corresponding second partial workpiece 44-50 (or the third partial workpiece 56-62 resulting from this) is machined a further time, for example, turned again and then cut, or machined again by creating a groove or a bore, and for this purpose the first partial workpiece 38-42 with the edge 63 is repositioned as required by the positioning device 22, so that the second partial workpiece 44-50 (orthe resulting third partial workpiece 56-62) can also be applied to the first partial workpiece 38-42 as desired for this further machining process within the second process section.

[0062] The process described above can also be represented as a flow chart with function blocks, as can be seen from Figure 24After a start in function block 64, an initial workpiece is divided into a first strip-shaped workpiece (longitudinal cut) in function block 66. Function block 68 queries whether a further strip-shaped workpiece should be cut from the initial workpiece. If the answer is yes, the system returns to function block 66. If the answer is no, a trimming cut is first performed in function block 70a. Subsequently, in function block 70, the first produced strip-shaped workpiece is first divided into a first partial workpiece and a second partial workpiece (cross-section, first process step).

[0063] Function block 72 then queries whether a recut should be performed on the second partial workpiece. If the answer is yes, function block 74 queries whether the second partial workpiece should be rotated before the recut, taking into account, for example, grain, decorative patterns, and any pre-processing involved. If the answer is yes, the direction of rotation and / or angle of rotation are / is first determined in function block 76, and then the second partial workpiece is rotated accordingly. The first partial workpiece is then positioned in function block 78 by the positioning device, and in function block 80 the second partial workpiece is placed against the positioned first partial workpiece. In function block 82 the recut is then performed on the second partial workpiece, creating a third and a fourth partial workpiece (the latter usually as a waste part) (second process step). These are removed in a function block 84.

[0064] Function block 86 queries whether further cross-sections should be made on the strip-shaped workpiece. If the answer is yes, the program returns to function block 70. If the answer is no, function block 88 queries whether further strip-shaped workpieces should be divided by cross-sections. If the answer is yes, the program returns to block 70. Otherwise, the process ends in an end block 90.

[0065] The method described above is stored as a computer program in the memory 29b of the control and regulating device 29. This contributes to the control and regulating device 29 being configured to execute the above method.

Claims

1. Method for machining workpieces, in particular by means of a panel dividing system (10), in which, in a first method step, a workpiece (32-36) is automatically divided into a first partial workpiece (38-42) and at least a second partial workpiece (44-50), and in which, in a second method step, the second partial workpiece (44-50) is machined, characterized in that in the second method step, the first partial workpiece (38-42) produced in the first method step is still held by a positioning device (22) and, for the machining of the second partial workpiece (44-50), is automatically positioned as a stop (63) for the positioning of the second partial workpiece (44-50) relative to a machining device, and the second partial workpiece (44-50) is placed against the first partial workpiece (38-42).

2. Method according to claim 1, characterized in that the machining of the second partial workpiece (44-50) in the second method step comprises dividing it at least into a third partial workpiece (56-62) and a fourth partial workpiece (52) and / or forming at least one groove and / or at least one bore.

3. Method according to any of the preceding claims, characterized in that, between the first method step and the second method step, the second partial workpiece (44-50) is rotated, preferably by 90°.

4. Method according to claim 2 or 3, characterized in that the positioning or rotation of the second partial workpiece (44-50) during the second method step depends on the position of the groove and / or the bore to be formed.

5. Method according to any of the preceding claims, characterized in that, in the second method step, the second partial workpiece (44-50) is machined, in particular divided, several times and the first partial workpiece (38-42) is repositioned several times for this purpose.

6. Method according to any of the preceding claims, characterized in that the division is carried out using a saw, a milling cutter, a laser cutting device or a water jet cutting device.

7. Method according to any of the preceding claims, characterized in that, before the first method step, an initial workpiece (30) is divided into a plurality of workpieces (32-36), in particular by first cuts into a plurality of strips, at least one of which is then further divided into partial workpieces in the first method step, in particular by at least a second cut, and machined in the second method step, in particular further divided by at least a third cut.

8. Method according to any of the preceding claims, characterized in that, in a third method step after the second method step, the first partial workpiece (38-42) which is still held by the positioning device (22) is machined, in particular divided.

9. Method according to any of the preceding claims, characterized in that a panel-shaped workpiece (30-50) is divided or machined using the method.

10. Method according to any of the preceding claims, characterized in that the first partial workpiece (38-42) is positioned, for dividing the second partial workpiece (44-50) in the second method step, such that a region of the second partial workpiece (44-50) adjacent to the first partial workpiece (38-42) is a final workpiece (56-62) and a region of the second partial workpiece (44-50) remote from the first partial workpiece (38-42) is a waste part (52).

11. Method according to any of claims 1-9, characterized in that the first partial workpiece (38-42) is positioned, for dividing the second partial workpiece (44-50) in the second method step, such that a region of the second partial workpiece (44-50) adjacent to the first partial workpiece (38-42) is a waste part (52) and a region of the second partial workpiece (44-50) remote from the first partial workpiece (38-42) is a final workpiece (56-62).

12. Method according to any of claims 1-9, characterized in that the first partial workpiece (38-42) is positioned, for dividing the second partial workpiece (44-50) in the second method step, such that a region of the second partial workpiece (44-50) adjacent to the first partial workpiece (38-42) is a first final workpiece (52) and a region of the second partial workpiece (44-50) remote from the first partial workpiece (38-42) is a second final workpiece (56-62).

13. Computer program product which, when run on a computer, is configured to carry out a method according to any of the preceding claims.

14. Workpiece machining system (10), in particular a panel dividing system for dividing panel-shaped workpieces, comprising a positioning device (22) which can position a workpiece (32-36), and comprising a control and regulating device (29) comprising a processor (29a) and a memory (29b), which can control the positioning device (22), characterized in that the control and regulating device (29) is configured to carry out the method according to any of claims 1-12.