JP2015085330A - Plate processing method and processing program creation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a processing program creation device capable of reducing occurrence of damage to a component, a positional deviation of the component, and detachment of a joint due to expansion of both end parts of a bend line when bending the component.SOLUTION: An allocation part 311 allocates a component to a plate. When the component is bent at a bend line, a cut-off region setting part 313 sets a cut-off region at the outside of the component so as to include an expanded part that expands to the outside of the component in both end parts of the bend line. A cutting path calculation part 314, while setting a joint with the plate to a portion other than the cut-off region, calculates a first cutting path for cutting the plate along the outer edge of the component allocated to the plate and a second cutting path for cutting off the cut-off region and forming an opening at the outside of components adjacent to both end parts of the bend line. A cutting processing data generation part 315 generates cutting processing data for cutting the plate along the first and second cutting paths.

Description

  The present invention relates to a plate material processing method and a processing program creation device for cutting out a part having a predetermined shape from a plate material.

  A laser processing machine is used to cut out a part having a predetermined shape from a metal plate. When cutting a plate material with a laser and cutting out a component, the laser processing machine processes the plate material in a state where the component and the plate material are connected by a small portion (joint) so that the component does not fall from the plate material (Patent Document 1). reference). Parts connected to the plate material by a joint can be easily removed from the plate material by hand.

  In some cases, a planar part cut out from a plate material is bent at a predetermined position to obtain a final product. When cutting and bending multiple parts from a single plate, bending the plate with multiple components connected by a joint rather than individually bending the individual components after removing them from the plate After that, it is more efficient to remove the individual parts from the plate.

  Therefore, when trying to obtain a plurality of bent parts, the following procedure is generally used. First, a plate material is processed by a laser processing machine so as to form a plurality of planar parts connected by a joint. The component in this state is referred to as a cluster member. Next, the cluster member is bent by a bending machine. Finally, the individual bent parts are removed from the plate by hand.

JP 2001-334379 A

  In recent years, relatively many fiber lasers have been used as lasers used in laser processing machines. In laser processing using a fiber laser, it is possible to cut the plate material with a kerf width narrower than when processing with other lasers.

  In general, when a metal part is bent at a predetermined location (bending line), compressive stress is generated in the bent inner portion, so that both ends of the bending line swell outward. Although the component and the plate material are separated by the kerf width, if the both ends of the bending line in the component swell, the swelled portion may interfere with the plate material. In laser processing using a fiber laser, since the kerf width is narrow, both end portions of the bulged bending line are likely to interfere with the plate material.

  When both ends of the bending line interfere with the plate material, there are problems that the component is scratched or that the position of the component relative to the plate material is slightly displaced. If bending is performed in a state where the position of the component is shifted, it may be a defective product. In addition, there is a problem that the joint may come off when both ends of the bending line interfere with the plate material.

  These problems do not occur only when the cluster member is bent. Even in the case of a single component, the above-mentioned problem may occur when a component that is connected to a plate material by a joint is formed on the plate material and the plate material is bent without removing the component from the plate material.

  The present invention reduces the occurrence of component scratches, component misalignment, and joint detachment due to swelling of both ends of a bend line when bending a plate member that forms a component connected with a plate member by a joint. It is an object of the present invention to provide a plate material processing method and a processing program creation device that can be used.

  In order to solve the above-described problems of the conventional technology, the present invention assigns a part cut out from a metal plate to the plate, and when the component is bent at a bending line set at a predetermined position in the component. A cut-off area setting step for setting a cut-out area on the outside of the part so as to include a bulging part that bulges outside the part at both ends of the bend line, and a joint with the plate material at a portion other than the cut-out area In the state of setting, the component outer edge cutting step of cutting the plate material along the outer edge of the component assigned to the plate material, and cutting off the cut-off area, outside the component adjacent to both ends of the bending line And an opening forming step for forming the opening.

  In the above-described plate material processing method, the method further includes a bending bulge amount acquisition step of acquiring a bending bulge amount of the bulging portion, and the cut-off region setting step is based on the bending bulge amount acquired in the bending bulge amount acquisition step. It is preferable to set the cut-off area.

  In the plate material processing method, the component outer edge cutting step preferably cuts the plate material with a laser, and the opening forming step preferably forms the opening by laser cutting or punching.

  In the above plate material processing method, the allocating step further includes a bending step of allocating a plurality of parts to the plate material and bending the plate material at a position where a bending line in the plurality of components passes after the opening forming step. It is preferable.

  Further, in order to solve the above-described problems of the conventional technology, the present invention folds the part cut out from a metal plate material to the plate material, and the component is bent at a bending line set at a predetermined position in the component. A cut-off area setting section for setting a cut-out area outside the part so as to include a bulging part that bulges outside the part at both ends of the bending line, and the plate material on a portion other than the cut-out area. In a state where the joint is set, a first cutting path calculation unit that calculates a first cutting path for cutting the plate material along an outer edge of the component assigned to the plate material, and the cut-off area is cut off A second cutting path calculation unit for calculating a second cutting path for forming an opening outside the part adjacent to both ends of the bend line, and the plate member Providing a machining program creating device, characterized in that it comprises a cutting machining data generation unit for generating cutting data for cutting along the first and second cutting path.

  In the above processing program creation device, further comprising a bending bulge amount acquisition unit for acquiring a bending bulge amount of the bulging portion, the cut-off area setting unit is based on the bending bulge amount acquired by the bending bulge amount acquisition unit, It is preferable to set the cut-off area.

  In the machining program creation device, it is preferable that the cut-off area setting unit sets a rectangular bounding box including the bulge part as the cut-out area.

  In the machining program creation device, the allocation unit generates bending data for allocating a plurality of parts to the plate material and generating the bending data for bending the plate material at a position where a bending line in the plurality of parts passes. It is preferable to further include a part.

  According to the plate material processing method and the processing program creation apparatus of the present invention, it is possible to reduce the occurrence of component scratches, component position shifts, and joint disengages.

It is a block diagram which shows the whole structure of the board | plate material processing apparatus containing the processing program creation apparatus of one Embodiment. It is a block diagram which shows the conceptual detailed structure of the machining program creation apparatus of one Embodiment. It is a top view which shows the state which allocated several components to the board | plate material. It is a top view which shows the bulging part which generate | occur | produces when bending components in the position of a bending line. It is a top view which shows the cut-off area | region which consists of a rectangular bounding box set to a bulging part. It is a fragmentary top view which shows the width | variety and height of a bulging part. It is a fragmentary top view which shows the cutout area | region of the other shape set to a bulging part. It is a figure which shows the example of the cutting | disconnection path | route which cut | disconnects the outer edge of components, and the outer edge of a cut-off area | region. It is a figure for demonstrating the bending process by a bending machine. It is a flowchart which shows the board | plate material processing method of one Embodiment. It is a flowchart which shows the detailed process of step S107 in FIG.

  Hereinafter, a plate material processing method and a processing program creation device according to an embodiment will be described with reference to the accompanying drawings. First, the overall configuration and operation of a plate material processing apparatus that cuts out a part having a predetermined shape from a metal plate material will be described with reference to FIG.

  The CAD 10 includes a part data creation device 11. The part data creation device 11 creates part data indicating a part to be cut out from a plate material. The part data includes information such as the shape, size, bending position and bending angle of the part, bending attribute values such as elongation due to bending, and the like. The component data is two-dimensional (2D) data or three-dimensional (3D) data. The component data may be composed of 2D data and 3D data.

  The CAD 10 can realize the function of the component data creation device 11 by executing a computer program.

  The component data created by the component data creation device 11 is stored in a component data management database (component data management DB) 21 in the data management server 20. The component data stored in the component data management DB 21 is read and input to the CAM 30. The part data created by the part data creation device 11 may be directly input to the CAM 30.

  The CAM 30 includes a machining program creation device 31 that creates a machining program for cutting out a part having a predetermined shape from a plate material by cutting and bending the plate material. Plate material data and component data are input to the machining program creation device 31. The plate material data includes information such as the size, plate thickness, and material of the plate material. The material of the plate material is iron, tentress, aluminum or the like.

  The machining program creation device 31 has a bending bulge amount database (bending bulge amount DB) 310. The bending bulge amount DB 310 stores bending bulge amounts at both ends of the bending line according to the plate thickness and material of the plate material and the bending angle. The bending bulge amount DB 310 preferably stores information indicating the bending bulge shape in addition to the bending bulge amount.

  The amount of bending bulge in each combination of various plate thicknesses, materials, and bending angles is examined in advance, and each amount of bending bulge may be stored in the amount of bending bulge DB 310. The processing program creation device 31 may acquire the bending bulge amount from the bending bulge amount DB 310 according to the plate thickness and material of the plate material to be processed and the bending angle.

  Or, by examining the bending bulge amount for each combination of sheet thickness, material, and bending angle in advance, obtain a calculation formula that predicts the bending bulge amount according to the combination of the plate thickness, material, and bending angle. You may store in quantity DB310. In this case, the machining program creation device 31 uses the calculation formula stored in the bending bulge amount DB 310 to calculate the bending bulge amount according to the plate thickness and material of the plate to be processed and the bending angle. What is necessary is just to acquire the amount of bending bulges.

  The machining program creation device 31 executes a nesting process for assigning one or more parts indicated by the part data to the board indicated by the board data. The machining program creation device 31 creates a machining program including cutting data for cutting a plate material to which one or more parts are assigned and bending data for bending the plate material.

  The machining program created by the machining program creation device 31 is stored in a machining program management database (machining program management DB) 22 in the data management server 20. The machining program stored in the machining program management DB 22 is read and input to the NC device 40. The machining program created by the machining program creation device 31 may be directly input to the NC device 40.

  The CAM 30 can realize the function of the machining program creation device 31 by executing a computer program.

  The NC device 40 controls the multi-task machine 50 based on the machining program. The composite processing machine 50 is a processing machine in which a laser processing machine 51 and a bending machine 52 are provided in a composite manner. The laser processing machine 51 cuts the plate material based on the cutting processing data. The bending machine 52 bends the plate material based on the bending data. For example, the combined processing machine 50 cuts and bends the plate material with a laser in a state where the surface of the plate material is vertical.

  In the present embodiment, the combined processing machine 50 is used, but separate laser processing machines and bending machines may be used.

  The conceptual detailed configuration and specific operation of the machining program creation device 31 will be described with reference to FIGS. 2 and 3 to 9.

  As shown in FIG. 2, the machining program creation device 31 includes, as a conceptual configuration, an allocation unit 311, a bending bulge amount acquisition unit 312, a cut region setting unit 313, a cutting path calculation unit 314, and a cutting processing data generation unit 315. A bending data generation unit 316 is provided. The cutting path calculation unit 314 includes a part cutting path calculation unit (first cutting path calculation unit) 3141 and a cut-off area cutting path calculation (second cutting path calculation unit) 3142.

  Plate material data and component data are input to the allocation unit 311. The allocating unit 311 allocates, for example, nine components 70 in 3 rows × 3 columns to the plate material 60 as shown in FIG. 3 based on the plate material data and the component data. The horizontal arrangement in FIG. 3 is a row, and the vertical arrangement is a column. Although FIG. 3 shows a cluster member to which the same plurality of parts are assigned, it may be a cluster member to which a plurality of different parts are assigned.

  The allocating unit 311 may allocate the maximum number of components 70 to the plate member 60, or may allocate the components 70 by a specified number within the maximum number range. Further, the allocating unit 311 may allocate only one component 70 to the plate material 60.

  In the example shown in FIG. 3, a bending line LB is set for each component 70. The component 70 is bent at the position of the bending line LB by a bending process described later, and the bent component 70 is removed from the plate material 60.

  In FIG. 3, PJ indicated by a triangle indicates an example of a position where a joint for connecting the plate member 60 and the component 70 is provided. FIG. 3 is a cluster member showing a plurality of components 70 connected by joints.

  Returning to FIG. 2, the bending bulge amount acquisition unit 312 performs bending bulge amounts of the respective components 70 when the cluster member of FIG. 3 is bent based on the bending bulge amount or the calculation formula stored in the bending bulge amount DB 310. To get.

  When the bending bulge amount DB3 310 stores bending bulge amounts for combinations of various plate thicknesses, materials, and bending angles, the bending bulge amount acquisition unit 312 acquires the plate thickness, material, and bending line LB of the plate material 60. It is only necessary to read out the bending bulge amount corresponding to the combination with the bending angle at the position. When the calculation formula for predicting the bending bulge amount is stored in the bending bulge amount DB 310, the bending bulge amount acquisition unit 312 calculates the plate thickness, material, and bending angle at the position of the bending line LB. A bending bulge amount corresponding to the combination may be calculated based on a calculation formula.

  FIG. 4 shows a bulging portion 701 that is generated when the part 70 is bent at the position of the bending line LB and both end portions of the bending line LB bulge outward. FIG. 4 shows a state in which the component 70 is expanded in a flat shape for easy understanding. The bulge portion 701 is generally shaped so that the bending bulge amount is the largest at the position of the bending line LB, and the bending bulging amount gradually decreases as the distance from the bending line LB increases.

  In FIG. 2, the cut-off area setting unit 313 is a portion outside the part 70 that is not inflated, as shown in FIG. 5, and sets a cut-out area 702 that includes the inflated part 701. In the example illustrated in FIG. 5, the cut-off area setting unit 313 sets a rectangular bounding box including the bulge part 701 as the cut-out area 702.

  As shown in FIG. 6, when the width of the bulging portion 701 is W701 and the height is H701, the cut-out area 702 that is a bounding box is a rectangular area in which a clearance is added to each of the width W701 and the height H701. Good. The width W701 and the height H701 can be acquired by the bending bulge amount acquisition unit 312.

  The cut-off area setting unit 313 may automatically set the clearance for each of the width W701 and the height H701, or may be set manually by the operator.

  The cut-off area setting unit 313 is not limited to the bounding box, and as shown in FIG. 7, a cut-out area 703 that surrounds the bulging part 701 in an arc shape may be set. The cut-off area 702 is easier to set than the cut-out area 703, and the cut-off work of the plate material 60 in this portion is easier in the cut-off area 702. Therefore, the cut-off area 702 which is a rectangular bounding box is better.

  Hereinafter, the case where the cut-out area setting unit 313 sets the cut-out area 702 will be mainly described.

  The cutting path calculation unit 314 calculates a cutting path for cutting the outer edge of the component 70 and the outer edge of the cut-off area 702. For example, as shown in FIG. 8, the part cutting path calculation unit 3141 includes a cutting path C70a from the piercing P1 to the vicinity of the piercing P2 along the outer edge of the part 70, and a piercing P2 along the outer edge of the part 70. And a cutting path C70b from the vicinity of the pierce P1. The cutting paths C70a and C70b are first cutting paths for cutting the outer edge of the component 70 in the plate material 60 by the laser processing machine 51.

  Since the end of the cutting path C70b is not connected to the cutting path C70a, the gap between the cutting path C70a and the end of the cutting path C70b becomes the joint J1. Since the end of the cutting path C70a is not connected to the cutting path C70b, the gap between the end of the cutting path C70a and the cutting path C70b becomes the joint J2.

  The part cutting path calculation unit 3141 sets the cutting paths C70a and C70b so that the joints J1 and J2 are formed in a portion other than the cutting area 702 set by the cutting area setting unit 313.

  The cut-off area cutting path calculation unit 3142 calculates cutting paths C70c and C70d along the outer edges of the left and right cut-out areas 702 as shown in FIG. The cutting paths C70c and C70d are second cutting paths for cutting the outer edge of the cut-off area 702 in the plate material 60 by the laser processing machine 51.

  When cutting the outer edge of the cut-off area 702, the laser may be moved along the outer edge of the cut-out area 702 from within the kerf width of the cutting path C70a. Therefore, it is not necessary to provide piercings for the cutting paths C70c and C70d.

  The cutting paths C70a and C70b shown in FIG. 8 are merely examples. The cutting path for cutting the outer edge of the component 70 is not limited to the cutting paths C70a and C70b, and the number of joints is not limited to two.

  The cutting process data generation unit 315 generates cutting process data for cutting the plate material 60 by the laser processing machine 51 based on the cutting paths C70a to C70d. The cutting processing data is NC data (machine control code) for operating the laser processing machine 51 by the NC device 40.

  The bending data generation unit 316 generates bending data for bending the plate material 60 cut by the laser processing machine 51 by the bending machine 52 based on the plate material data and the component data and the allocation data by the allocation unit 311. Generate. The bending data is also NC data for operating the bending machine 52 by the NC device 40.

  The bending data includes information on the layout of the mold in the bending machine 52, information on the bending order, information on butting against the plate material 60, and the like.

  FIG. 9 shows a state where the NC device 40 controls the laser processing machine 51 based on the cutting processing data, and the laser processing machine 51 cuts the plate material 60. Each part 70 is surrounded by a groove 65 having a predetermined kerf width except for the joints J1 and J2 by cutting the cutting paths C70a and C70b with a laser. The component 70 is connected to the plate member 60 by joints J1 and J2.

  The cutting path C70c, C70d, which is the outer edge of the cut-out area 702, is cut by the laser, so that the cut-out area 702 is cut off. As a result, openings 66 are formed outside the component 70 and adjacent to both ends of the bending line LB. The opening 66 is expanded in the direction of the bending line LB rather than the kerf width of the groove 65. The opening 66 has a size including a bulging portion 701 generated at both ends of the bending line LB when the plate material 60 (component 70) is bent.

  In order to bend the plate member 60 shown in FIG. 9 by the bending machine 52, the three parts 70 in one row may be bent at the bending line LB at the same time. Therefore, the bending data generation unit 316 bends the plate material 60 along the bending line LB1 indicated by the thick dashed line connecting the bending lines LB of the three components 70 in the first row shown in FIG. Processing data may be generated.

  Similarly, bending data for bending the plate material 60 along the bending lines obtained by connecting the bending lines LB of the three components 70 in the second row and the third row which are not shown in FIG. 9 in a straight line. Should be generated.

  The NC device 40 bends the plate material 60 based on bending data for bending the plate material 60 along a bend line obtained by connecting the bend lines LB of the three components 70 in the first to third rows in a straight line. The bending machine 52 is controlled.

  The plate member 60 having nine parts 70 (cluster members) is bent by the bending process of three times so that all the parts 70 are bent at the bending line LB. And the components 70 of a desired shape are obtained by removing each component 70 from the board | plate material 60, dividing joints J1 and J2 by hand.

  The process by the board | plate material processing method of this embodiment is anew demonstrated using the flowchart shown in FIG.

  In step S101, the machining program creation device 31 (allocation unit 311) executes nesting for allocating the part 70 to be cut out from the metal plate material 60 to the plate material 60 (allocation step). The machining program creation device 31 (bending bulge amount acquisition unit 312), in step S102, folds the component 70 at the bending line LB set at a predetermined position in the component 70 at both ends of the bending line LB. The amount of bending bulge to the outside is acquired (bending bulge amount acquisition step).

  In step S103, the machining program creation device 31 (cut-off area setting unit 313) sets a bounding box that is an outer portion of the part 70 that is not inflated and includes a bulge part 701 having a bending bulge amount (cut-off). Area setting step). The bounding box is an example of a cut-out area including the bulging portion 701.

  In step S104, the machining program creation device 31 (cutting path calculation unit 314) calculates a cutting path that cuts the outer edge of the part 70 and the outer edge of the cut-off area 702 (cutting path calculation step). At this time, the machining program creation device 31 (cutting path calculation unit 314) calculates a cutting path in which joints J1 and J2 that connect the plate material 60 and the component 70 are formed so that the component 70 does not fall from the plate material 60. To do.

  In step S105, the machining program creation device 31 (cutting data generation unit 315) generates cutting data for cutting the plate material 60 by the laser processing machine 51 (cutting data generation step).

  In step S106, the machining program creation device 31 (bending data generation unit 316) generates bending data for bending the plate material 60 by the bending machine 52 (bending data generation step).

  Next, in step S107, the NC device 40 operates the laser processing machine 51 in accordance with the cutting processing data, and cuts the plate material 60 along the cutting path (plate material cutting step). Finally, in step S108, the NC device 40 operates the bending machine 52 according to the bending data, and bends the plate material 60 at a position where the bending lines LB in the plurality of parts 70 pass (bending process).

  FIG. 11 shows details of the plate material cutting step shown in step S107. In step S1071, the NC device 40 causes the laser processing machine 51 to cut the outer edge of the component 70 (component outer edge cutting step). In step S1072, the NC device 40 cuts the outer edge of the cut-off area 702 (703) by the laser processing machine 51 to form the opening 66 outside the part 70 adjacent to both ends of the bending line LB (opening formation). Process).

  In the opening forming process in step S1072, it is preferable to cut the outer edge of the cut-off area 702 (703) with a laser as in the part outer edge cutting process in step S1071. However, the opening 66 may be formed by cutting the plate member 60 by punching only in the opening forming step in step S1072.

  When the opening 66 is formed by punching, a punching machine is used in addition to the combined processing machine 50.

  Incidentally, the machining program creation device 31 shown in FIG. 2 includes a bending bulge amount DB 310 and a bending bulge amount acquisition unit 312 as desirable configurations. Further, the plate material processing method shown in FIG. 10 includes a bending bulge amount acquisition step of step S102 as a desirable procedure.

  However, the bending bulge amount DB 310 and the bending bulge amount acquisition unit 312 can be deleted as a simplified configuration, and the bending bulge amount acquisition step can be omitted as a simplified procedure.

  The cut-off area setting unit 313 includes a cut-out area 702 (703) on the outer side of the part 70 so as to include a bulging part 701 that bulges toward the outside of the part at both ends of the bend line LB when the part 70 is bent along the bend line LB. ) Should be set. The same applies to the cut-off area setting step.

  Even if the bending bulge amount is not strictly acquired, for example, the maximum bending bulge amount is obtained empirically, and the cut-off area 702 (703) is set so as to include the bulging portion 701 having the maximum bending bulge amount. May be. The cut-off region 702 (703) may have a margin of several mm with respect to the bulging portion 701.

  Further, the cut-out region 702 (703) may be set by roughly classifying the plate thickness into a plurality of pieces and assuming a bending bulge amount for each classification.

  Thus, the cut-out area 702 (703) may be a size including the bulging portion 701, and the size may be set to some extent so as to exceed the size of the bulging portion 701.

  According to the plate material processing method and the processing program creation device 31 of the present embodiment described above, the following operational effects are obtained. Even if both ends of the bending line LB of the component 70 bulge outward and the bulging portion 701 is generated by bending the plate material 60, the bulging portion 701 interferes with the plate material 60 because the opening 66 is formed. The possibility of doing so can be almost eliminated. Accordingly, it is possible to reduce the occurrence of scratches on the component 70, positional displacement of the component 70, and joint disengagement.

  The part 70 in which the bulging part 701 has occurred can be made into a part 70 having a shape to be originally obtained by deleting the bulging part 701 as necessary.

  The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the present invention.

10 CAD
11 Parts data creation device 20 Data management server 30 CAM
DESCRIPTION OF SYMBOLS 31 Processing program preparation apparatus 40 NC apparatus 50 Compound machine 51 Laser processing machine 52 Bending machine 311 Allocation part 312 Bending swelling amount acquisition part 313 Cut-off area setting part 314 Cutting path calculation part 315 Cutting process data generation part 316 Bending process data generation Part
3141 First cutting path calculation unit
3142 Second cutting path calculation unit

Claims (8)

An allocating step of allocating a part cut out from a metal plate to the plate;
When the part is bent at a bend line set at a predetermined position in the part, a cut-off area is set outside the part so as to include a bulge portion that bulges outside the part at both ends of the bend line. Cutting area setting process to
A component outer edge cutting step of cutting the plate material along the outer edge of the component assigned to the plate material in a state where the joint with the plate material is set in a portion other than the cut-off region,
An opening forming step of cutting off the cut-off region and forming an opening on the outside of the component adjacent to both ends of the bending line;
The board | plate material processing method characterized by including. A bending bulge amount acquiring step of acquiring a bending bulge amount of the bulging portion;
The plate material processing method according to claim 1, wherein the cut-off region setting step sets the cut-off region based on the bending bulge amount acquired in the bending bulge amount acquisition step. In the component outer edge cutting step, the plate material is cut by a laser,
The plate material processing method according to claim 1, wherein the opening forming step forms the opening by cutting or punching with a laser. The allocation step allocates a plurality of parts to the plate material,
The board | plate material processing method of any one of Claims 1-3 further including the bending process process which bends the said board | plate material in the position where the bending line in these parts passes after the said opening formation process. . An allocating portion for allocating a part cut out from a metal plate material to the plate material;
When the part is bent at a bend line set at a predetermined position in the part, a cut-off area is set outside the part so as to include a bulge portion that bulges outside the part at both ends of the bend line. A cut-off area setting section,
First cutting for calculating a first cutting path for cutting the plate material along the outer edge of the component assigned to the plate material in a state where the joint with the plate material is set in a portion other than the cut-off region A route calculator,
A second cutting path calculation unit that calculates a second cutting path for cutting off the cut region and forming an opening outside the part adjacent to both ends of the bending line;
A cutting data generator for generating cutting data for cutting the plate material along the first and second cutting paths;
A machining program creation device comprising: A bending bulge amount obtaining unit for obtaining a bending bulge amount of the bulging part;
The machining program creation device according to claim 5, wherein the cut-off area setting unit sets the cut-out area based on the bending bulge amount acquired by the bending bulge amount acquisition unit.   The machining program creation apparatus according to claim 5 or 6, wherein the cut-off area setting unit sets a rectangular bounding box including the bulge part as the cut-off area. The allocation unit allocates a plurality of parts to the plate material,
The bending processing data generation part which generates the bending processing data for bending the board at the position where the bending line in the plurality of parts passes is further provided. Machining program creation device.

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