Press brake control device
The press brake control device addresses the challenge of recognizing and correcting dimensional changes by calculating and displaying the dimensional adjustments of regions between bending positions, ensuring accurate product dimensions through real-time visualization.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- AMADA CO LTD
- Filing Date
- 2024-11-15
- Publication Date
- 2026-05-27
AI Technical Summary
Existing press brake control devices struggle to accurately recognize the correspondence between dimensional changes during the bending process and the resulting dimensions of each region of the product, especially in complex shapes with multiple bending positions.
A press brake control device equipped with a calculation unit that calculates and displays the dimensional changes of regions between bending positions and a display unit that shows the product image with corresponding dimensional adjustments, allowing operators to visualize and correct dimensional discrepancies.
Enables operators to recognize and correct dimensional discrepancies in real-time, ensuring accurate product dimensions by displaying the increase or decrease in dimensions of each region during the bending process.
Smart Images
Figure 2026087001000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a control device for a press brake.
Background Art
[0002] A press brake may bend a workpiece at a plurality of bending positions to produce a product having a predetermined shape. At this time, the processing dimensions of each region of the product bent at the plurality of bending positions may not be as designed.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] When the processing dimension of any region of a product is different from the designed dimension, the control device for a press brake has a function of inputting a dimension correction value to correct the dimension of the region different from the designed dimension. Naturally, if an operator inputs a dimension correction value to correct the dimension of any region, the dimensions of other regions will increase or decrease. The operator may not be able to recognize the correspondence between the increase or decrease in dimensions in the bending process when bending the workpiece and the increase or decrease in the dimensions of each region of the product. The more bending positions the workpiece has and the more complex the shape of the product is, the more difficult it is to recognize the correspondence.
[0005] There is a demand for the emergence of a control device for a press brake that can recognize the correspondence between the increase or decrease in dimensions in the bending process when bending a workpiece and the increase or decrease in the dimensions of each region of the product.
Means for Solving the Problems
[0006] A first aspect of one or more embodiments provides a press brake control device comprising: a calculation unit that, in any of a plurality of bending steps in which a workpiece is bent at a plurality of bending positions according to a processing program, inputs a dimensional correction value that increases or decreases the dimensions of at least one of two first regions between both ends of the workpiece and a bending position adjacent to each end of the ends, and one or more second regions between two adjacent bending positions, including regions for which no dimensional correction value has been input, and calculates the amount of increase or decrease in the dimensions of the first and second regions in a product produced by bending the workpiece in the plurality of bending steps; and a display control unit that displays a product image showing the product such that the cross-section or end face of all regions of the first and second regions in the product is displayed, and displays the amount of increase or decrease in the dimensions of each region corresponding to each region in the product image on the display unit.
[0007] A second aspect of one or more embodiments provides a press brake control device comprising: a display control unit that displays a product image on a display unit such that the cross-section or end face of all regions of a product manufactured by bending a workpiece at multiple bending positions according to a processing program is displayed, including both ends of the workpiece and two first regions between each end of the workpiece and one or more second regions between two adjacent bending positions; and a calculation unit that calculates the amount of increase or decrease in the dimensions of the one or more discard dimensions when a dimension change region to be corrected for dimensions among all regions is specified by the product image displayed on the display unit, a dimension correction value is input for the dimension change region, and one or more discard dimensions are specified by the product image displayed on the display unit to absorb the change in dimensions of regions other than the dimension change region by correcting the dimensions of the dimension change region by the dimension correction value, wherein the display control unit displays a dimension correction value input image on the display unit corresponding to each bending process of the multiple bending processes, showing the dimension correction value as the amount of increase or decrease in the dimensions of the one or more discard dimensions. [Effects of the Invention]
[0008] According to one or more embodiments of a press brake control device, when bending a workpiece, it is possible to recognize the correspondence between the increase or decrease in dimensions during the bending process and the increase or decrease in dimensions of each area of the product. [Brief explanation of the drawing]
[0009] [Figure 1] Figure 1 is a block diagram showing the schematic configuration of a press brake. [Figure 2] Figure 2 is a plan view showing an example of a workpiece that can be bent by a press brake. [Figure 3] Figure 3 is a cross-sectional view showing a product obtained by bending the workpiece shown in Figure 2 using a press brake. [Figure 4A] Figure 4A is a side view showing the first step of bending the workpiece shown in Figure 2 using a press brake. [Figure 4B] Figure 4B is a side view showing the second step of bending the workpiece shown in Figure 2 using a press brake. [Figure 4C] Figure 4C is a side view showing the third step, in which the workpiece shown in Figure 2 is bent using a press brake. [Figure 4D] Figure 4D is a side view showing the fourth step, in which the workpiece shown in Figure 2 is bent using a press brake. [Figure 5] Figure 5 shows the input images for dimensional correction values in the first to fourth processes of bending the workpiece shown in Figure 2 using a press brake. [Figure 6] Figure 6 illustrates the principle by which the central processing unit of the NC device calculates the increase or decrease in dimensions of each area of the workpiece when dimensional correction values are input in the first to fourth steps, as shown in Figure 5. [Figure 7] Figure 7 shows images confirming the dimensional increase or decrease of a product obtained by bending the workpiece shown in Figure 2 using a press brake. [Figure 8] Figure 8 is a cross-sectional view of a product where the region 6C of the product, which is a bent workpiece as shown in Figure 2, has machining dimensions different from the design dimensions. [Figure 9] FIG. 9 is a diagram showing an example of an area instruction image including a product image. [Figure 10] FIG. 10 is a flowchart showing an operation in which an operator corrects the dimensions of a dimension change area in a product when bending a workpiece. [Figure 11A] FIG. 11A is a diagram showing a state in which an operator designates an area selected from a plurality of areas in a product as a dimension change area. [Figure 11B] FIG. 11B is a diagram showing a state in which an operator designates an area selected from a plurality of areas in a product as a discard dimension area. [Figure 12] FIG. 12 is a diagram showing a dimension correction value input image when an operator designates a discard dimension area as shown in FIG. 11B.
Embodiments of the Invention
[0010] Hereinafter, a control device for a press brake according to the first and second embodiments will be described with reference to the accompanying drawings.
[0011] <First Embodiment> FIG. 1 shows a schematic configuration of a press brake 100. The press brake 100 includes an NC (Numerical Control) device 10, a display unit 20, an operation unit 30, and a press brake main body 50. The NC device 10 has a central processing unit (hereinafter, CPU) 11 and a storage unit 12 that stores a machining program. The machining program stored in a machining program database (not shown) is read out and stored in the storage unit 12. The display unit 20 and the operation unit 30 may be integrated. The operation unit 30 may be an operation button, a touch pad, or may include both. When the operation unit 30 includes a touch pad, the integrated display unit 20 and operation unit 30 are a so-called touch panel.
[0012] The press brake body 50 has an upper table 51, a lower table 52, a lifting mechanism 53 for raising and lowering the upper table 51, and a back gauge 54. The upper table 51 mounts a punch 5P shown in FIGS. 4A to 4D described later. The lower table 52 mounts a die 5D shown in FIGS. 4A to 4D. The back gauge 54 has an abutment 540 shown in FIGS. 4A to 4D for abutting against a workpiece disposed on the die 5D. The back gauge 54 has one or more abutments 540. The specific configuration of the press brake 100 (press brake body 50) is described in Patent Document 1.
[0013] Suppose that the workpiece to be bent by the press brake 100 is a rectangular sheet metal 60 shown in FIG. 2. Suppose that the sheet metal 60 is bent at bending positions 6L1 to 6L4 indicated by broken lines by the press brake 100 to produce a C-shaped steel product 61 having the shape shown in FIG. 3. Two regions between both ends of the sheet metal 60 and the bending positions 6L1 and 6L4 adjacent to each end of both ends are defined as regions 6A and 6E (first regions). Regions between two adjacent bending positions among the bending positions 6L1 to 6L4 are defined as regions 6B to 6D (second regions). If there are two or more bending positions, the region between two adjacent bending positions becomes one or more second regions.
[0014] FIG. 3 is a cross-sectional view (or end view) of the product 61, showing all cross-sections (or end faces) of the regions 6A to 6E. The respective dimensions 10 mm, 25 mm, 75 mm, 25 mm, and 10 mm of the regions 6A to 6E shown in FIGS. 2 and 3 are design dimensions.
[0015] To obtain the product 61 shown in Figure 3, the operator bends the sheet metal 60 sequentially by the first to fourth steps shown in Figures 4A to 4D. As shown in Figure 4A, in the first step, the operator places the sheet metal 60 on the die 5D so that the tip of the punch 5P strikes the bending position 6L1, and lowers the upper table 51, thereby bending the sheet metal between regions 6A and 6B at a 90-degree angle. The end of the sheet metal 60 on the region 6A side is abutting against the stopper 540. As shown in Figure 4B, in the second step, the operator places the sheet metal 60 on the die 5D so that the tip of the punch 5P strikes the bending position 6L2, and lowers the upper table 51, thereby bending the sheet metal between regions 6B and 6C at a 90-degree angle. Region 6A is abutting against the stopper 540.
[0016] As shown in Figure 4C, in the third step, the operator places the sheet metal 60 on the die 5D so that the tip of the punch 5P strikes the bending position 6L4, and lowers the upper table 51, thereby bending the area between regions 6D and 6E at a 90-degree angle. The end of the sheet metal 60 on the region 6E side is abutting against the stopper 540. As shown in Figure 4D, in the fourth step, the operator places the sheet metal 60 on the die 5D so that the tip of the punch 5P strikes the bending position 6L3, and lowers the upper table 51, thereby bending the area between regions 6C and 6D at a 90-degree angle. Region 6E is abutting against the stopper 540.
[0017] In this way, by bending the sheet metal 60 sequentially at bending positions 6L1 to 6L4 using the press brake 100, the product 61 shown in Figure 3 can be manufactured. In reality, the processing dimensions of regions 6A to 6E of product 61 may not be exactly the design dimensions of 10mm, 25mm, 75mm, 25mm, and 10mm.
[0018] Therefore, the NC device 10 is equipped with a function to input dimensional correction values in order to correct the dimensions of regions 6A to 6E in the first to fourth processes. The CPU 11 displays the dimensional correction value input image 70 shown in Figure 5 on the display unit 20 in response to a predetermined operation by the operation unit 30. Here, the dimensional correction value input image 70 includes the first to fourth dimensional correction value input images 701 to 704 corresponding to the first to fourth processes. Let's assume that the operator inputs -0.2mm, -0.2mm, -0.1mm, and +0.2mm as dimensional correction values for the first to fourth processes, respectively.
[0019] The first dimension correction value input image 701 includes a bending process image 711, which contains images corresponding to punch 5P, die 5D, sheet metal 60, and stopper 540 in the first process, and a dimension correction value input field 72. The dimension correction value input field 72 displays "-0.2mm". The second dimension correction value input image 702 includes a bending process image 712 in the second process, and a dimension correction value input field 72. The dimension correction value input field 72 displays "-0.2mm".
[0020] The third dimension correction value input image 703 includes the bending process image 713 in the third process and the dimension correction value input field 72. The dimension correction value input field 72 displays "-0.1mm". The fourth dimension correction value input image 704 includes the bending process image 714 in the fourth process and the dimension correction value input field 72. The dimension correction value input field 72 displays "+0.2mm".
[0021] The CPU 11 may simultaneously display the first to fourth dimension correction value input images 701 to 704 on the display unit 20, or it may sequentially display the first to fourth dimension correction value input images 701 to 704 in response to a predetermined operation by the operation unit 30.
[0022] When dimensional correction values are input in the first to fourth processes, the NC device 10 controls the press brake body 50 to bend the sheet metal 60 in each process based on the processing program, changing the bending position of the sheet metal 60 by the amount of the dimensional correction value. Accordingly, the NC device 10 changes the position of the abutment 540 of the back gauge 54. In each process, the operator abuts the sheet metal 60 against the abutment 540 whose position has been changed, thereby bending the sheet metal 60 with the bending position changed by the amount of the dimensional correction value.
[0023] Even after the operator inputs dimensional correction values for each of the first to fourth processes and views the dimensional correction value input image 70 displayed on the display unit 20, it may not be possible to recognize how the dimensions of each region 6A to 6E of the product 61 shown in Figure 3 increase or decrease. For the sake of simplicity, the bending positions of the sheet metal 60 are set to four locations, 6L1 to 6L4, and the product 61 is assumed to have a relatively simple shape. However, the more bending positions there are and the more complex the shape of the product, the more difficult it becomes to recognize how the dimensions of each region of the product increase or decrease.
[0024] Therefore, the CPU 11 calculates the increase or decrease in each dimension of regions 6A to 6E based on the principle shown in Figure 6. In Figure 6, the thick solid line 541 indicates the position where the abutment 540 is abutted (hereinafter referred to as the abutment position 541). The total process dimension correction value is a uniform dimension correction value that is entered all at once in the first to fourth processes. Here, the total process dimension correction value is set to 0, and no uniform dimension correction value is entered in the first to fourth processes.
[0025] As described above, the operator inputs -0.2mm, -0.2mm, -0.1mm, and +0.2mm as dimensional correction values for the first to fourth processes, respectively. As shown in Figure 6, in the first process, the abutment position 541 is the end of the sheet metal 60 on the region 6A side. In the first process, -0.2 is entered in the dimensional correction value column for region 6A for each process. If the dimension of region 6A is shortened by 0.2mm, the dimensions of the regions opposite the bending position 6L1 are affected by the 0.2mm shortening of the dimension of region 6A. Since regions 6B to 6E are a single continuous region, the region from 6B to 6E becomes 0.2mm longer. Therefore, (-1) × dimensional correction value, which is +0.2, is entered in the dimensional correction value column for regions 6B to 6E.
[0026] The carry-over correction value indicates the dimensional correction value that is carried over to the next process. When sheet metal 60 is bent at bending position 6L1, the dimension of region 6A is not affected by the bending process in the second and subsequent processes, so the carry-over correction value for region 6A is fixed at -0.2 mm, as indicated by the hatching. The dimensional correction value of +0.2 mm for regions 6B to 6E is carried over to the next process, so +0.2 is entered in the carry-over correction value field. However, each dimension in regions 6B to 6E is affected by the bending process in the second and subsequent processes, so it is not fixed at +0.2 mm and is not hatched.
[0027] In the second process, the abutment position 541 is the end of region 6B on the region 6A side. In the second process, -0.2 is entered in the column for the dimensional correction value for each process in region 6B. Since regions 6C to 6E are a single continuous region, +0.2, which is (-1) × dimensional correction value, is entered in the column for the dimensional correction value of regions 6C to 6E. When the sheet metal 60 is bent at bending position 6L2, the dimensions of region 6B are not affected by the bending process from the third process onward, so the carryover correction value for region 6B is fixed at -0.2 mm, as indicated by the hatching. In the column for the carryover correction value of regions 6C to 6E, +0.4 is entered, which is the sum of the +0.2 mm carried over in the first process and the +0.2 mm carried over in the second process. Here again, since each dimension of regions 6C to 6E is affected by the bending process from the third process onward, it is not fixed at +0.4 mm and is not hatched.
[0028] In the third step, the abutment position 541 is the end of the sheet metal 60 on the region 6E side. In the third step, -0.1 is entered in the column for the dimensional correction value for region 6E for each step. Since regions 6C and 6D are a single continuous region, (-1) × dimensional correction value, which is +0.1, is entered in the column for the dimensional correction value for regions 6C and 6D. When the sheet metal 60 is bent at bending position 6L4, the dimensions of region 6E are not affected by the bending process in the fourth step, so the carryover correction value for region 6E is fixed at -0.1 mm, as indicated by the hatching. In the column for the carryover correction value for regions 6C and 6D, +0.5 is entered, which is the sum of the +0.4 mm carried over in the second step and the +0.1 mm carried over in the third step. Since the dimensions of regions 6C and 6D are affected by the bending process in the fourth step, they are not fixed at +0.5 mm and are not hatched.
[0029] In the fourth step, the abutment position 541 is the end of region 6D on the region 6E side. In the fourth step, +0.2 is entered in the dimension correction value column for region 6D for each step. In the dimension correction value column for region 6C, -0.2, which is (-1) × dimension correction value, is entered. In the carry-over correction value column for region 6C, +0.3 is entered, which is the sum of the +0.5 mm carried over in the third step and the -0.2 mm carried over in the fourth step. When the sheet metal 60 is bent at bending position 6L3, as indicated by the hatching, the carry-over correction value for region 6D is fixed at +0.2 mm, and the carry-over correction value for region 6C is fixed at +0.3 mm.
[0030] Based on the above principle, CPU11 calculates the increase or decrease in dimensions for regions 6A to 6E, and the results are -0.2mm, -0.2mm, +0.3mm, +0.2mm, and -0.1mm, respectively.
[0031] The CPU 11 responds to a predetermined operation by the operation unit 30 and displays the dimension increase / decrease confirmation image 80 shown in Figure 7 on the display unit 20. The dimension increase / decrease confirmation image 80 includes a product image 61i corresponding to the product 61 shown in Figure 3, and the increase / decrease amount of dimensions for each region 6A to 6E. The increase / decrease amount of dimensions for each region is displayed adjacent to each region.
[0032] The CPU 11 functions as a calculation unit that calculates the amount of increase or decrease in the dimensions of each region. The CPU 11 receives a dimensional correction value that increases or decreases the dimensions of at least one of two first regions and one or more second regions in one of the bending processes in which the workpiece is bent at multiple bending positions according to the processing program. The first regions are the regions between both ends of the workpiece and the bending positions adjacent to each end, and in the example shown in Figure 2, these are regions 6A and 6E. The second regions are the regions between two adjacent bending positions, and in the example shown in Figure 2, these are regions 6B to 6D.
[0033] When a dimensional correction value is input, the CPU 11 calculates the increase or decrease in dimensions of the first and second regions of the product, which is manufactured by bending the workpiece in multiple bending processes, including regions where no dimensional correction value has been input.
[0034] The CPU 11 functions as a display control unit that displays the product image and the increase or decrease in dimensions of each region on the display unit 20. The product image 61i included in the dimension increase / decrease confirmation image 80 shown in Figure 7 shows the product 61 such that all cross-sections (or end faces) of the first and second regions (regions 6A to 6E) of the product 61 are displayed. The CPU 11 displays the increase or decrease in each region on the display unit 20, corresponding to each region in the product image 61i.
[0035] The operator can easily recognize how the dimensions of each region of the product 61 increase or decrease when a dimensional correction value is entered for any region. The CPU 11 may simultaneously display the dimensional correction value input image 70 shown in Figure 5 and the dimensional increase / decrease confirmation image 80 shown in Figure 9 on the display unit 20 in parallel, or it may display them selectively. In either case, the operator can recognize how the dimensions of each region of the product 61 increase or decrease.
[0036] According to the first embodiment, when bending a workpiece, the operator can recognize the correspondence between the increase or decrease in dimensions during the bending process and the increase or decrease in dimensions of each area of the product. Specifically, according to the first embodiment, when the operator sets a dimension correction value in any of the multiple processes for bending the workpiece using the dimension correction value input image 70, the operator can recognize the amount of increase or decrease in dimensions of each area of the product using the dimension increase / decrease confirmation image 80.
[0037] <Second Embodiment> In the second embodiment, the description of the parts common to the first embodiment will be omitted. The press brake 100 bends the sheet metal 60 shown in Figure 2 at bending positions 6L1 to 6L4 by the first to fourth processes shown in Figures 4A to 4D to produce a product 61 as shown in Figure 3. The design dimension of region 6C is 75 mm, but when the dimension of region 6C of the manufactured product 61 was measured, it was 74.7 mm as shown in Figure 8. Region 6C is a region that is required to be the same dimension as the design dimension. Therefore, the operator wants to make the dimension of region 6C 0.3 mm longer.
[0038] The CPU 11 can display a region indication image 90 on the display unit 20 as shown in Figure 9 in response to a predetermined operation by the operation unit 30. The region indication image 90 includes a product image 61i corresponding to the product 61 shown in Figure 3. The product image 61i shows the product 61 so as to display all cross-sections (or end faces) of regions 6A to 6E in the product 61 which is manufactured by bending the sheet metal 60 at bending positions 6L1 to 6L4 according to the processing program.
[0039] Using the flowchart shown in Figure 10, a series of actions are described to explain how an operator checks the dimensions of region 6C and, if necessary, lengthens the dimensions of region 6C by 0.3 mm. In Figure 10, when the bending process of the workpiece (sheet metal 60) is started, the operator bends the workpiece with the press brake 100 in step S1. In step S2, the operator measures the dimensions of each region of the product 61. In step S2, the operator may measure the dimensions of only region 6C of the product 61.
[0040] In step S3, the operator determines whether or not it is necessary to correct the dimensions of region 6C. If the machined dimensions of region 6C are within a predetermined tolerance compared to the design dimensions, the operator determines that it is not necessary to correct the dimensions of region 6C (NO). In this case, the operator terminates the operation.
[0041] In step S3, if the machining dimension of area 6C is not within a predetermined tolerance compared to the design dimension, it is determined that the dimension of area 6C needs to be corrected (YES). The operator operates the control unit 30 to display the area indication image 90 shown in Figure 9 on the display unit 20. In step S4, the operator specifies the dimension change area, which is the area to be corrected, and inputs +0.3 mm as the dimension correction value. As shown in Figure 11A, the operator touches the cross section (or end face) corresponding to area 6C in the product image 61i with their finger to specify area 6C as the dimension change area.
[0042] In step S5, the operator designates the sacrificial dimension area. The sacrificial dimension area is an area that absorbs the dimensional changes in areas other than the dimension change area by correcting the dimensions of the dimension change area by only the dimensional correction value. As shown in Figure 11B, the operator designates areas 6A and 6E as the sacrificial dimension area by sequentially touching the cross sections (or end faces) corresponding to areas 6A and 6E in the product image 61i with their fingers. The operator may designate only area 6A as the sacrificial dimension area, or only area 6E as the sacrificial dimension area. Areas 6A and 6E are the areas that will be bent in the first and third processes, respectively.
[0043] In step S6, the NC device 10 automatically inputs dimensional correction values for the first and third processes. Since the dimensional correction value for region 6C, which is the dimension change region, is +0.3 mm, the sum of the dimensional correction values in the first and third processes should be -0.3 mm. Therefore, in step S6, the NC device 10 sets the dimensional correction values for the first and third processes to -0.15 mm, for example. If only region 6A or 6E is designated as a discard dimension region, the NC device 10 sets the dimensional correction value for the first or third process to -0.3 mm.
[0044] In step S7, the operator bends the new workpiece using the press brake 100. In step S8, the operator measures the dimensions of each region (or region 6C only) of the product 61. In step S9, the operator determines whether the dimensions of region 6C, which is the dimensional change region, have been properly corrected. If the machined dimensions of region 6C of the product 61, which has been bent from the new workpiece, are within a predetermined tolerance compared to the design dimensions, then the dimensions of region 6C have been properly corrected. If the machined dimensions of region 6C are not within a predetermined tolerance, then the dimensions of region 6C have not been properly corrected.
[0045] If the dimensions of region 6C are not properly corrected in step S9 (NO), the operator repeats the operations from step S4 onward. If the dimensions of region 6C are properly corrected in step S9 (YES), the operator terminates the operation.
[0046] Once the NC device 10 has input dimensional correction values for the first and third processes, the CPU 11 can respond to a predetermined operation by the operation unit 30 and display a dimensional correction value input image 70 on the display unit 20 similar to that in Figure 5. Figure 12 shows the dimensional correction value input image 70 with dimensional correction values input to the first and third dimensional correction value input images 701 and 703, which correspond to the first and third processes, respectively.
[0047] As described above, the CPU 11 functions as a display control unit and displays a region indication image 90 on the display unit 20, which includes a product image 61i showing the cross-sections (or end faces) of all regions of the first and second regions. The CPU 11 functions as a calculation unit and, when a dimension change region and one or more discard dimension regions are specified and a dimension correction value for the dimension change region is input, it calculates the increase or decrease in the dimensions of the one or more discard dimension regions. Therefore, the operator can automatically set the increase or decrease in the dimensions of the discard dimension regions in the NC device 10 simply by specifying the dimension change region and the discard dimension region and inputting the dimension correction value for the dimension change region.
[0048] The CPU 11 displays a dimension correction value input image 70 on the display unit 20, which shows a dimension correction value as an increase or decrease in the dimensions of one or more discard dimension areas, corresponding to each bending process of the multiple bending processes. The CPU 11 may display the area indication image 90 and the dimension correction value input image 70 simultaneously and in parallel on the display unit 20, or it may display them selectively. In either case, the operator can recognize how the dimensions of each area of the product 61 increase or decrease in each bending process.
[0049] According to the second embodiment, when bending a workpiece, the operator can recognize the correspondence between the increase or decrease in dimensions during the bending process and the increase or decrease in dimensions of each region of the product. Specifically, according to the second embodiment, when the operator designates any of the multiple regions of the product as a dimension change region and a discard dimension region using the region indication image 90 and inputs a dimension correction value, the operator can recognize the bending process in which the dimensions increase or decrease and the dimension correction value using the dimension correction value input image 70.
[0050] The present invention is not limited to the first or second embodiments described above, and various modifications are possible without departing from the spirit of the invention. [Explanation of Symbols]
[0051] 5D Die 5P Punch 6A~6E area Bending positions 6L1~6L4 10 NC device 11 Central Processing Unit 12 Storage section 20 Display section 30 Control section 50 Press brake body 51 Upper Table 52 Lower Table 53 Lifting mechanism 54 Back Gauge 60 Sheet Metal 61 products 61i Product Image 70 Dimensional Correction Value Input Image 72. Dimensional Correction Value Input Field Image 80 for checking size increase / decrease 90-region indication image 100 Press Brake 540 Hit the wall 701-704 Input images for dimension correction values 1st-4th Images 711-714 of the bending process
Claims
1. A calculation unit calculates the increase or decrease in the dimensions of the first and second regions in a product manufactured by bending the workpiece in the multiple bending processes, including regions where no dimensional correction values have been entered, when a dimensional correction value is input to increase or decrease the dimensions of at least one of two first regions between the ends of the workpiece and the bending positions adjacent to each end of the ends, and one or more second regions between the two adjacent bending positions, in any of the multiple bending processes in which a workpiece is bent according to a processing program. A display control unit displays a product image of the product on a display unit such that the cross-section or end face of all the first and second regions of the product is displayed, and displays the amount of increase or decrease in the dimensions of each region corresponding to each region in the product image on the display unit. A press brake control device equipped with [a specific feature].
2. The display control unit, A dimension correction value input image showing the input dimension correction value corresponding to each bending step of the plurality of bending steps, The product image and the dimension increase / decrease confirmation image, which includes the increase or decrease in the dimensions of each region, Displayed simultaneously or selectively on the display unit. A control device for a press brake according to claim 1.
3. A display control unit that displays a product image representing a product, which is manufactured by bending a workpiece at multiple bending positions according to a processing program, such that the cross-section or end face of all regions of the product are displayed, including the cross-section or end face of all regions of the product, which is manufactured by bending a workpiece at multiple bending positions according to a processing program, including two first regions between both ends of the workpiece and the bending positions adjacent to each end of the two ends, and one or more second regions between the two adjacent bending positions. A calculation unit calculates the amount of increase or decrease in the dimensions of the one or more discarded dimension areas, when the product image displayed on the display unit specifies the dimension change area to be corrected from all the areas, the dimension correction value for the dimension change area is input, and one or more discarded dimension areas are specified on the display unit to absorb the change in dimensions of areas other than the dimension change area by correcting the dimensions of the dimension change area by the dimension correction value, Equipped with, The display control unit displays a dimension correction value input image on the display unit, which indicates a dimension correction value as an increase or decrease in the dimension of the one or more discard dimension areas, corresponding to each bending step of the plurality of bending steps. A control device for press brakes.
4. The display control unit, The product image includes the area indication image for specifying the dimension change area and the discarded dimension area, The aforementioned dimensional correction value input image and, Displayed simultaneously or selectively on the display unit. The control device for a press brake according to claim 3.