Method and machine arrangement for cutting a residual grid from a separating machining operation of a plate-shaped workpiece, as well as a machine system with such an arrangement

Abstract

Method for cutting a residual grid (8) of a separating machining operation of a plate-shaped workpiece (1), in particular a residual grid (8) of a separating sheet metal machining operation, wherein the residual grid (8) is machined separatingly and thereby cut into residual grid parts (19), • wherein the residual lattice (8) is divided into residual lattice parts (19) by means of a preparatory separation process and by means of a final separation process following the preparatory separation process, • wherein the residual grid (8) is processed along a separation line (10) of the preparatory separation process and along a separation line (18) of the final separation process during the final separation process, and the separation line (10) of the preparatory separation process and the separation line (18) of the final separation process run at an angle to each other, • wherein, during the preparatory separation process, boundaries of residual grid parts (19) running along the separation line (10) of the preparatory separation process and opposite each other are generated, which are adjacent to each other along the separation line (18) of the final separation process and • wherein in the final separation process the adjacent residual lattice parts (19) are completely separated from each other by generating boundaries of the adjacent residual lattice parts (19) running along the separation line (18) of the final separation process and abutting the boundaries generated in the preparatory separation process, characterized in that a mutual orientation of the separation line (10) of the preparatory separation process and the separation line (18) of the final separation process on the residual lattice (8) is chosen depending on a residual lattice geometry.

Description

[0001] The invention relates to a method for dividing a residual grid from a separating machining operation of a plate-shaped workpiece, in particular a residual grid from a separating sheet metal machining operation, wherein the residual grid is machined separatingly and thereby divided into residual grid parts, • wherein the residual lattice is divided into residual lattice parts by means of a preparatory separation process and by means of a final separation process that follows the preparatory separation process in time, • wherein the residual grid is processed along a separation line of the preparatory separation process and along a separation line of the final separation process during the final separation process, and the separation line of the preparatory separation process and the separation line of the final separation process run at an angle to each other, • wherein, during the preparatory separation process, boundaries of residual grid parts running along the separation line of the preparatory separation process and opposite each other are created, which are adjacent to each other along the separation line of the final separation process and • wherein in the final separation process the adjacent residual lattice parts are completely separated from each other by creating boundaries of the adjacent residual lattice parts running along the separation line of the final separation process and abutting the boundaries created in the preparatory separation process.

[0002] The invention also relates to a mechanical arrangement for carrying out the aforementioned method and to a mechanical system with such an arrangement.

[0003] Residual grids, such as those produced as processing waste during sheet metal cutting, often have considerable dimensions and therefore frequently need to be cut up for disposal.

[0004] The prior art of this type is known from EP 4 116 007 A1.

[0005] This document discloses a method and a device for cutting a stamped grid, which is waste from a stamping sheet metal processing operation. In addition to a stamping device, a waste separation device is provided, comprising punches and a separating blade positioned downstream of the punches in one direction of movement of the stamped grid. In a preparatory cutting operation, the punches cut through the grid's webs with a cutting line extending in the direction of movement of the stamped grid. Subsequently, a final cutting operation is performed by the separating blade with a cutting line perpendicular to the direction of movement of the stamped grid.

[0006] Further prior art is known from EP 1 649 958 A1 and JP S59-189 089 A.

[0007] EP 1 649 958 A1 relates to a residual grid cutting device with several shear teeth. The shear teeth have two cutting edges that extend from one corner of the shear teeth at an angle to each other. To cut a residual grid, the shear teeth execute cutting strokes perpendicular to the main plane of the residual grid relative to the grid being cut. The shear teeth simultaneously penetrate the residual grid with both cutting edges and cut the grid.

[0008] In practical operation, the previously known shear teeth have proven to be prone to wear. Consequently, with the prior art, only residual grids with a relatively small thickness can be cut.

[0009] From JP S59-189 089 A a laser cutting machine for the separating waste post-treatment following a cutting process is known.

[0010] Based on the prior art of the generic type, the invention is based on the objective of enabling optimal division of the residual grid.

[0011] This problem is solved according to the invention by the method according to claim 1, by the mechanical arrangement according to claim 11 and by the mechanical system according to claim 15.

[0012] In the case of the invention, the division process is divided into a preparatory separation process and a final separation process. During the preparatory separation process, opposing boundaries of residual lattice parts are created along a separation line of the preparatory separation process, and these boundaries are adjacent to each other at the separation line of the final separation process. Subsequently, during the final separation process, boundaries of the adjacent residual lattice parts are created along the separation line of the final separation process, abutting the boundaries created during the preparatory separation process. This completely separates the adjacent residual lattice parts from each other.The path of the separation line for the preparatory separation process and / or the separation line for the final separation process, which must be selected for optimal division of the residual grid, depends on the geometry of the residual grid and is therefore also selected according to the invention depending on the geometry of the residual grid. For this purpose, in the arrangement according to the invention, a residual grid support provided for holding the residual grid during division, on the one hand, and the separation device for carrying out the preparatory separation process and / or the separation device for carrying out the final separation process, on the other hand, are adjustable relative to each other about an adjusting axis that runs perpendicular to a support plane formed by the residual grid support.

[0013] In a further development of the invention, different separation devices of the machine arrangement according to the invention are provided for carrying out the preparatory separation process and for carrying out the final separation process (patent claim 12).

[0014] In a preferred embodiment of the invention, the preparatory separation process for cutting the residual grid is carried out with the same separation device with which the residual grid is produced during the separating workpiece processing (claim 2).

[0015] In a further development of the invention, the separating workpiece processing is additionally or alternatively parallelized in time with the preparatory separating process and / or with the final separating process for cutting the residual grid (patent claim 3).

[0016] According to claim 4, the preparatory separation process for cutting the remaining grid is carried out as a laser separation process in a further preferred embodiment of the invention. For carrying out the preparatory separation process, the machine arrangement according to the invention in this case includes a laser cutting device (claim 13). The laser cutting device can then also be used for the workpiece separation process.

[0017] Particularly in cases where the residual grid is moved between the preparatory cutting operation and the final cutting operation and / or during the machining of the workpiece, it is recommended to perform the preparatory cutting operation along a cutting line that does not terminate at the edge of the residual grid but rather ends at a distance from the edge of the residual grid (claim 5). This ensures that the residual grid retains a stability advantageous for its movement after the preparatory cutting operation.

[0018] In a further preferred embodiment of the invention, for the sake of simplicity, the residual grid is processed during the final separation process along a separation line which runs in a straight line over the entire dimension of the residual grid extending along the separation line of the final separation process (claim 6).

[0019] Preferably, a guillotine shear is used, with a cutting edge that extends along the cutting line of the guillotine shear, which is intended as the cutting line of the final cutting operation, over the entire dimension of the remaining grid and which preferably performs a single cutting stroke to carry out the final cutting operation (claims 7, 14). Gully shears have very robust cutting tools at relatively low acquisition costs.

[0020] The methods according to the invention, as defined in claims 8 and 10, enable the fragmentation of even large-area residual grids into small pieces.

[0021] According to claim 8, the residual grid is cut into strips. According to claim 10, more than two residual grid parts arranged along the dividing line of the final separation process are separated from each other.

[0022] By combining the features of claims 8 and 10, a variant of the inventive method is obtained in which several residual grid strips are each divided into more than two residual grid parts.

[0023] In a preferred embodiment of the invention, the separation line of the preparatory separation process on one of the residual grid strips and the separation line of the preparatory separation process on the adjacent residual grid strip are also arranged offset from each other along the separation line of the final separation process running between the residual grid strips (claim 9).

[0024] The invention is explained in more detail below with reference to exemplary schematic diagrams. These show... Fig. 1 a sheet metal surface to be machined, with a covering of finished parts to be produced and with a residual grid, Fig. 2 the sheet metal according to Fig. 1 with dividing lines for a preparatory separation process to divide the residual grid, Fig. 3 the sheet metal according to Fig. 2 with additional dividing lines for a final separation process to divide the remaining grid, Fig. 4 a machine system with a machine arrangement for cutting a residual grid of a separating sheet metal processing with a residual grid support and with a guillotine shear with a first mutual orientation of the residual grid support and the guillotine shear, Fig. 5 the machine arrangement according to Fig. 4 with a second mutual orientation of the residual grid support and the guillotine shear and Fig. 6 the order according to the Fig. 4 and Fig. 5 with a third mutual orientation of the residual grid support and the guillotine shear.

[0025] Fig. Figure 1 shows a plate-shaped workpiece in the form of a sheet metal part 1, as it is attached to a Fig. The machine system 2 shown in section 4 for separating sheet metal processing is stored in a numerical machine control 3.

[0026] The machine system 2 comprises a processing device which, in the illustrated example, is designed as a conventional punch-laser machine 4. For the separating processing of the sheet metal 1, the punch-laser machine 4 has, in a known manner, a first separating device in the form of a punching device 5 and a second separating device in the form of a laser cutting device 6.

[0027] After the Fig. As shown in the layout plan, a large number of finished parts 7 with different geometries are cut from the sheet metal 1 using the punching device 5 and the laser cutting device 6. Cutting the finished parts 7 creates a residual grid 8 that encloses the finished parts 7.

[0028] After completion of the separating process of the sheet metal 1 and / or even during the ongoing separating process, finished parts 7 are removed from the residual grid 8 by means of a conventional unloading device 9 of the machine system 2, for example by means of a suction frame of known design. The residual grid 8 is disposed of as processing waste after the finished parts 7 have been completely unloaded.

[0029] Due to its considerable dimensions, the remaining grid 8 is cut into pieces to simplify its disposal.

[0030] For this purpose, a preparatory separation process and a final separation process following the preparatory separation process are carried out on the residual grid 8.

[0031] In the illustrated example, the preparatory separation process is carried out as a laser cutting process using the laser cutting device 6 of the punch-laser machine 4 during the separation processing of the sheet metal 1. Firstly, the laser cutting device 6 cuts finished parts 7 from the sheet metal 1. Secondly, the laser cutting device 6 creates preparatory separation cuts on the remaining grid 8, which serve to prepare for the complete separation of the remaining grid 8. Fig. Figure 2 shows the representation of the sheet metal 1 stored in the machine control 3 with the placement of the finished parts 7 and additionally with separation lines 10 of the preparatory separation process, which depict the preparatory separation cuts created during the preparatory separation process.

[0032] For the execution of the final separation process to cut the remaining grid 8, the machine system 2 has a separation device in the form of a guillotine shear 11 with a separation unit 12.

[0033] The laser cutting device 6 of the punch-laser machine 4 and the guillotine shear 11 therefore form a dividing device for dividing the residual grid 8.

[0034] Adjacent to the guillotine shear 11 is a residual grid support 13, which forms a horizontal support plane for the residual grid 8.

[0035] In the usual way, the cutting unit 12 of the guillotine shear 11 enables long straight cuts through the interaction of a vertically movable cutting edge 14 with a fixed cutting edge 15.

[0036] The residual grid support 13 is provided with a continuously circulating support belt 16 in a known manner. After completion of the separating processing of the sheet metal 1 on the punching-laser machine 4 and after complete unloading of the finished parts 7, the residual grid 8 is placed on the support belt 16 by means of a conventional mechanical handling device 17. At this point, the residual grid 8 is already provided with the preparatory separation cuts running along the separation lines 10 of the preparatory separation process.

[0037] For the final cutting, the remaining grid 8, which has been provided with the preparatory cutting cuts, is moved intermittently to the cutting unit 12 of the guillotine shear 11 by a controlled motor feed movement of the support belt 16.

[0038] In order for the residual grid 8 to be broken down into remnant grid parts suitable for disposal by actuating the guillotine shear 11, the separation cuts or separation lines 10 of the preparatory separation process and the separation lines 18 of the final separation process carried out by the guillotine shear 11 must be oriented appropriately relative to each other, depending on the geometry of the residual grid 8. In any case, the separation lines 10 of the preparatory separation process and the separation lines 18 of the final separation process run at an angle to each other.

[0039] The mutual orientation chosen in the present case of the separating lines 10 of the preparatory separating process and the separating lines 18 of the final separating process results from Fig. 3.

[0040] Accordingly, in the illustrated example, the residual lattice 8 is divided into residual lattice parts 19 in strips. Residual lattice strips are each divided into residual lattice parts 19 by means of a preparatory separation process and a final separation process that follows the preparatory separation process.

[0041] In the preparatory cutting process carried out on the punch-laser machine 4 using the laser cutting device 6, all affected residual grid strips are cut along the cutting lines 10 of the preparatory cutting process. This creates opposing boundaries of two or more residual grid parts 19 along the cutting line(s) 10 of the preparatory cutting process, which are adjacent to each other along the assigned cutting line 18 of the final cutting process.

[0042] In the subsequent final separation process, the adjacent residual lattice parts 19 of a residual lattice strip are completely separated from one another by creating boundaries of the adjacent residual lattice parts 19 along the relevant separation line 18 of the final separation process and abutting the boundaries created in the preparatory separation process. This completely separates the adjacent residual lattice parts 19 of the relevant residual lattice strip from one another.

[0043] The final separation operation on each of the remaining grid strips is carried out by the guillotine shear 11 as a final cutting operation with a single working stroke of the cutting edge 14 of the guillotine shear 11. The cutting edge 14 runs in a straight line along the separation line 18 provided as the cutting line of the final separation operation over the entire dimension of the remaining grid 8 extending along the cutting line of the final separation operation.

[0044] After several residual grid parts 19 are produced from each of the residual grid strips, the residual grid parts 19 have dimensions that are well suited for disposal.

[0045] The separation lines 10 of the preparatory separation process end at a distance from the edge of the residual grid 8. This ensures that the residual grid 8 retains stability despite the preparatory separation cuts, enabling smooth movement of the residual grid 8 on the punching-laser machine 4 and on the residual grid support 13.

[0046] For corresponding reasons, the separation lines 10 of the preparatory separation process on adjacent residual grid strips are offset from each other along the separation line 18 of the final separation process running between the residual grid strips.

[0047] A suitable mutual orientation of the separation lines 10 of the preparatory separation process and the separation lines 18 of the final separation process is made possible by the fact that the residual grid support 13 and the separation unit 12 of the guillotine shear 11 can be adjusted relative to each other about an adjusting axis 20, which runs perpendicular to a support plane formed by the residual grid support 13.

[0048] The mutual orientation of the separating lines 10 of the preparatory separating process and the separating lines 18 of the final separating process, which is appropriate for the present case, is achieved in the Fig. 5 and at the in Fig. The mutual orientation of the residual grid support 13 and the separation unit 12 of the guillotine shear 11 is set as shown in Figure 6.

[0049] Compared to Fig. 4 is in Fig. 5 the residual grid support 13 relative to the cutting unit 12 of the guillotine shear 11 and in Fig.6. The cutting unit 12 of the guillotine shear 11 is adjusted relative to the residual grid support 13. It is also conceivable that both the cutting unit 12 of the guillotine shear 11 and the residual grid support 13 are moved around the adjusting axis 20.

Claims

[1] Method for dividing a residual grid (8) of a separating processing of a plate-shaped workpiece (1), in particular a residual grid (8) of a separating sheet metal processing, wherein the residual grid (8) is processed in a separating manner and thereby divided into residual grid parts (19), • wherein the residual grid (8) is divided into residual grid parts (19) by means of a preparatory separation process and by means of a final separation process following the preparatory separation process, • wherein the residual grid (8) is machined in a separating manner during the preparatory separating process along a separating line (10) of the preparatory separating process and during the final separating process along a separating line (18) of the final separating process, and the separating line (10) of the preparatory separating process and the separating line (18) of the final separating process extend at an angle to one another, • wherein, during the preparatory separation process, boundaries of residual grid parts (19) are produced which run along the separation line (10) of the preparatory separation process and lie opposite one another, said boundaries being adjacent to one another along the separation line (18) of the final separation process, and • wherein, in the final separation process, the adjacent residual grid parts (19) are completely separated from one another by producing boundaries of the adjacent residual grid parts (19) running along the separation line (18) of the final separation process and abutting the boundaries produced in the preparatory separation process, characterized by that a mutual orientation of the parting line (10) of the preparatory parting process and the parting line (18) of the final parting process on the residual grid (8) is selected depending on a residual grid geometry. [2] Method according to claim 1, characterized bythat the preparatory separating process is carried out by means of a separating device by means of which the workpiece (1) is separated to produce the residual skeleton (8). [3] Method according to one of the preceding claims, characterized by that the preparatory separating process and / or the final separating process is carried out during the separating machining of the workpiece (1), by which the residual skeleton (8) is produced. [4] Method according to one of the preceding claims, characterized by that the preparatory cutting process is carried out as a laser cutting process. [5] Method according to one of the preceding claims, characterized by that the preparatory separating process is carried out along a separating line (10) of the preparatory separating process which ends at a distance from an edge of the residual grid (8). [6] Method according to one of the preceding claims, characterized bythat the residual grid (8) is machined in the final separating process along a separating line (18) of the final separating process, which runs in a straight line over the entire dimension of the residual grid (8) extending along the separating line (18) of the final separating process. [7] Method according to claim 6, characterized by that the final separating process is carried out as a final cutting process by means of a guillotine shear (11) with a single working stroke of a cutting edge (14) which runs along the separating line (18) provided as the cutting line of the final separating process over the entire dimension of the residual skeleton (8) extending along the cutting line of the final separating process. [8] Method according to one of the preceding claims, characterized bythat the residual grid (8) is divided into strips into residual grid parts (19) by dividing residual grid strips into residual grid parts (19) by means of a preparatory separating process and by means of a final separating process following the preparatory separating process, • wherein the residual skeleton strips are each separated during the preparatory separation process along a separation line (10) of the preparatory separation process and during the final separation process along a separation line (18) of the final separation process, and the separation line (10) of the preparatory separation process and the separation line (18) of the final separation process run at an angle to each other, • wherein, during the preparatory separation process, boundaries of residual grid parts (19) are produced on the residual grid strips along the separation line (10) of the preparatory separation process and opposite one another, which are adjacent to one another at the separation line (18) of the final separation process, and • wherein the adjacent residual grid parts (19) on the residual grid strips are completely separated from one another during the final separation process, in that during the final separation process boundaries of the adjacent residual grid parts (19) are produced which run along the separation line (18) of the final separation process and abut the boundaries produced during the preparatory separation process. [9] Method according to claim 8, characterized bythat the parting line (10) of the preparatory parting process on one of the residual grid strips and the parting line (10) of the preparatory parting process on the adjacent residual grid strip are offset from one another along the parting line (18) of the final parting process running between the residual grid strips. [10] Method according to one of the preceding claims, characterized by that the residual skeleton (8) is separated during the preparatory separating process along several separating lines (10) of the preparatory separating process. [11] Mechanical arrangement for dividing a residual grid (8) of a separating processing of a plate-shaped workpiece (1), in particular a residual grid (8) of a separating sheet metal processing, with a dividing device (6, 11) by means of which the residual grid (8) can be separated and thereby divided into residual grid parts (19), • wherein the residual grid (8) can be divided into residual grid parts (19) by means of the dividing device (6, 11), in that a preparatory separation process and a final separation process following the preparatory separation process can be carried out on the residual grid (8) by means of the dividing device (6, 11), • wherein the residual grid (8) can be separated by means of the cutting device (6, 11) during the preparatory separation process along a separation line (10) of the preparatory separation process and during the final separation process along a separation line (18) of the final separation process, and the separation line (10) of the preparatory separation process and the separation line (18) of the final separation process run at an angle to one another, • wherein, by means of the dividing device (6, 11), during the preparatory separation process, boundaries of residual grid parts (19) extending along the separation line (10) of the preparatory separation process and lying opposite one another can be produced, which are adjacent to one another at the separation line (18) of the final separation process and • wherein, by means of the dividing device (6, 11), the adjacent residual grid parts (19) can be completely separated from one another during the final separation process, in that, by means of the dividing device (6, 11), during the final separation process, boundaries of the adjacent residual grid parts (19) can be produced along the separation line (18) of the final separation process and abutting the boundaries produced during the preparatory separation process, characterized byin that a residual skeleton support (13) is provided for supporting the residual skeleton (8), which forms a support plane for the residual skeleton (8), and in that a mutual orientation of the parting line (10) of the preparatory parting process and the parting line (18) of the final parting process on the residual skeleton (8) can be adjusted by the residual skeleton support (13) and the parting device for carrying out the preparatory parting process and / or the residual skeleton support (13) and the parting device for carrying out the final parting process being adjustable relative to one another about an adjusting axis (20) which runs perpendicular to the support plane formed by the residual skeleton support (13). [12] Mechanical arrangement according to claim 11, characterized by that the cutting device (6, 11) has a cutting device for carrying out the preparatory cutting process and a cutting device for carrying out the final cutting process [13] Mechanical arrangement according to claim 12, characterized by that a laser cutting device (6) is provided as the cutting device for carrying out the preparatory cutting process. [14] Mechanical arrangement according to claim 12 or claim 13, characterized by that a guillotine shear (11) is provided as a separating device for carrying out the final separating process, with a cutting edge (14) provided as a separating tool, which runs along the separating line (18) provided as a cutting line of the final separating process over the entire dimension of the residual skeleton (8) extending along the cutting line of the final separating process. [15] Mechanical installation with a mechanical processing device (4) by means of which a plate-shaped workpiece (1), in particular a sheet metal, can be separated to produce a residual grid (8) and with a mechanical arrangement for dividing the residual grid (8), characterized bythat the mechanical arrangement for dividing the residual grid (8) is designed according to one of claims 11 to 14.

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