Control device and display method for wire electric discharge machine

Abstract

According to an aspect of the present disclosure, a control device (20) for a wire electric discharge machine (10) is provided with: a first drawing control unit (162) that draws a machining path (RA) on a display device (124), using an electrode position (EP) of a wire electrode (60) as a display position of a start position (SA) of the machining path (RA); a storage control unit (158) that stores the display position of the start position in a storage device (122); and a second drawing control unit (164) that redraws the processing path on the display device using the display position stored in the storage device as the start position.

Description

Technical Field

[0001] The invention relates to a control device and a display method for a wire electrical discharge machine. Background Art

[0002] Japanese Patent Application Laid-Open No. 2012-83999 discloses a machine tool that resumes interrupted processing after insert processing is completed. Summary of the invention

[0003] There is room for improvement in redrawing the machining path when machining is resumed after machining is interrupted.

[0004] A first aspect of the present invention is a control device for a wire electric discharge machine that performs electric discharge machining on a machining object by moving a wire electrode relative to the machining object, the control device for the wire electric discharge machine comprising: a first drawing control unit that displays the electrode position of the wire electrode at the starting position of the machining path before the wire electric discharge machine performs first electric discharge machining on the first machining object along the machining path, and draws the machining path on a display device using the display position of the electrode position as the display position of the starting position; a storage control unit that stores the display position of the starting position when drawing the machining path in a storage device when there is an insertion request indicating a second electric discharge machining on a second machining object before the first electric discharge machining is completed; and a second drawing control unit that redraws the machining path on the display device using the display position stored in the storage device as the starting position when the wire electric discharge machine restarts the wire electric discharge machining after the second electric discharge machining is completed.

[0005] A second aspect of the present invention is a display method for a wire discharge machine that performs discharge machining on a processing object by moving a wire electrode relative to the processing object, the display method for the wire discharge machine comprising: a first drawing step, which displays the electrode position of the wire electrode located at the starting position of the processing path before the wire discharge machine performs first discharge machining on the first processing object along the processing path, and uses the display position of the electrode position as the display position of the starting position to draw the processing path on a display device; a storage step, which stores the display position of the starting position when drawing the processing path in a storage device when there is an insertion request indicating a second discharge machining on a second processing object before the first discharge machining is completed; and a second drawing step, which redraws the processing path on the display device using the display position stored in the storage device as the starting position when the wire discharge machine restarts the first discharge machining after the second discharge machining is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is a diagram showing a wire electrical discharge machine and its control device. Figure 2 This is a block diagram showing the configuration of a wire electrical discharge machine and a control device. Figure 3 This is a diagram illustrating a first processing object and a second processing object on a table. Figure 4 This is a diagram illustrating an example of a machining path of a first electrical discharge machining on a first machining object drawn on a display device. Figure 5 This is a diagram illustrating an example of a locus of the first electrical discharge machining that is drawn on the display device when the first electrical discharge machining is interrupted. Figure 6 This is a diagram illustrating a machining path of the second electrical discharge machining on the second machining object drawn on the display device. Figure 7 This is a diagram illustrating an example of the locus of the second electric discharge machining drawn on the display device when the second electric discharge machining is completed. Figure 8 This is a diagram illustrating an example of a machining path and trajectory of the first electrical discharge machining that are drawn on the display device when the first electrical discharge machining is restarted. Fig. 9 This is a flowchart showing a processing procedure related to a display method of a wire electrical discharge machine. Fig.10 This is a flowchart showing a processing procedure related to a display method of a wire electrical discharge machine. Fig.11 This is a flowchart showing a processing procedure related to a display method of a wire electrical discharge machine. DETAILED DESCRIPTION

[0007] According to the conventional control device and display method of the wire discharge machine, when a machining interruption occurs due to another machining interruption, the already drawn machining path is deleted. After the interruption machining is completed, the machining path of the interrupted machining is redrawn. In this case, there is a problem that the machining path is redrawn using the electrode position of the wire electrode after the interruption position is restored as the starting position. As a result, the operator cannot correctly grasp the machining status after the restart on the redrawn machining path.

[0008] Figure 1 1 is a diagram showing a wire electrical discharge machine 10 and a control device 20 thereof. Figure 1The X direction, Y direction, and Z direction shown are mutually orthogonal, and the -Z direction is the gravity direction. The object to be processed (not shown) is supported on a worktable 62. The machining power supply 30 applies a voltage between electrodes formed by the wire electrode 60 and the object to be processed to generate discharge. The wire electrical discharge machine 10 performs electrical discharge machining on the object to be processed using the discharge generated between the electrodes.

[0009] During the electrical discharge machining, the control device 20 moves the wire electrode 60 relative to the object to be machined along a machining path specified by a predetermined program. The relative movement of the wire electrode 60 and the object to be machined is performed by moving the table 62, for example.

[0010] The wire discharge machine 10 includes an upper wire guide 64 and a lower wire guide 66. The upper wire guide 64 includes an upper guide block 68, an upper die guide 70, and an upper nozzle (not shown). The lower wire guide 66 includes a lower guide block 72, a lower die guide 74, and a lower nozzle (not shown). The upper wire guide 64 supports the wire electrode 60 above the worktable 62 and the object to be processed (in the +Z direction). The lower wire guide 66 supports the wire electrode 60 below the worktable 62 (in the -Z direction).

[0011] The wire electrode 60 is supplied from the wire reel 76 in the conveying direction at a predetermined speed. The wire electrode 60 is conveyed via the roller 78, the upper wire guide 64, the object to be processed, and the lower wire guide 66. The wire electrode 60 that has passed through the lower wire guide 66 is pinched by the pinch roller 84 and the feed roller 86. The wire electrode 60 is recovered by the recovery box 88.

[0012] When performing wire discharge machining, the machining tank 90 can store machining fluid. In this case, the worktable 62, the object to be machined, the upper wire guide 64, and the lower wire guide 66 are immersed in the machining fluid. The machining tank 90 is provided on the floor 92. The machining fluid is sprayed from the upper nozzle of the upper wire guide 64 and the lower nozzle of the lower wire guide 66 to the inter-electrode space.

[0013] Figure 2 2 is a block diagram showing the configuration of the wire electric discharge machine 10 and the control device 20. Figure 2 FIG. 2 shows only a portion of the structure of the wire electric discharge machine 10 related to machining control. The wire electric discharge machine 10 has Figure 1 The shift drive unit 102 and the transport drive unit 104 are not shown. Figure 2 In the embodiment, the object W is placed on the table 62. The machining power source 30 repeatedly applies a pulse voltage to the gap G formed by the wire electrode 60 and the object W.

[0014] The displacement drive unit 102 drives the worktable 62. As a result, the wire electrode 60 can be relatively moved in the X direction and the Y direction relative to the processing object W. The displacement drive unit 102 includes an X motor, a Y motor, an X drive transmission mechanism, and a Y drive transmission mechanism. The X motor is a motor for moving the worktable 62 in the X direction. The Y motor is a motor for moving the worktable 62 in the Y direction.

[0015] The X drive transmission mechanism is a mechanism for converting the rotational motion of the X motor into the linear motion of the worktable 62 in the X direction. The Y drive transmission mechanism is a mechanism for converting the rotational motion of the Y motor into the linear motion of the worktable 62 in the Y direction. The X drive transmission mechanism and the Y drive transmission mechanism are respectively composed of a ball screw and a nut. In addition, an encoder (rotation position detection sensor) for detecting the rotation position is provided in the X motor and the Y motor.

[0016] The transport drive unit 104 has Figure 1 The roller 78 shown in the figure and the conveying motor not shown in the figure. The conveying motor rotates the roller 78. The conveying motor is provided with an encoder (rotational position detection sensor) for detecting the rotational position. The roller 78 conveys the wire electrode 60 wound on the bobbin 76 toward the object W to be processed by rotating.

[0017] The control device 20 has a processing circuit 120, a storage device 122, and a display device 124. The processing circuit 120 includes a processor such as a CPU or a GPU. The storage device 122 includes a volatile memory such as a RAM and a non-volatile memory such as a ROM or a flash memory. The volatile memory is used as a working memory of the processor. The non-volatile memory stores programs executed by the processor and other necessary data. The storage device 122 also stores a machining program for electric discharge machining. A machining path is depicted on the display device 124. The display device 124 can also be set outside the control device 20.

[0018] The processing circuit 120 includes a processing control unit 150, a storage control unit 158, an instruction receiving processing unit 160, a first drawing control unit 162, and a second drawing control unit 164. The processing control unit 150 includes a shift control unit 182, a transport control unit 184, and a power supply control unit 186. The processing control unit 150, the storage control unit 158, the instruction receiving processing unit 160, the first drawing control unit 162, and the second drawing control unit 164 are realized by the processing circuit 120 executing a program stored in the storage device 122.

[0019] At least part of the processing control unit 150 , the storage control unit 158 ​​, the instruction reception processing unit 160 , the first drawing control unit 162 , and the second drawing control unit 164 may be realized by an integrated circuit such as ASIC or FPGA, or an electronic circuit including discrete devices.

[0020] The machining control unit 150 reads out the machining program from the storage device 122 , and performs electrical discharge machining on the machining object W along a machining path based on the machining program.

[0021] The displacement control unit 182 controls the displacement drive unit 102 to drive the table 62. As a result, the wire electrode 60 moves relative to the object W. In this way, the displacement control unit 182 can displace the electrode position of the wire electrode 60. For example, the displacement control unit 182 moves the electrode position of the wire electrode 60 to the start position of the processing path.

[0022] The transport control unit 184 controls the transport drive unit 104 to rotate the roller 78. As a result, the wire electrode 60 is transported relative to the object W. The power supply control unit 186 controls the machining power supply 30 to apply a voltage to the inter-electrode G. The machining control unit 150 performs electrical discharge machining on the object W from the starting position along the machining path based on the control processing of the displacement control unit 182, the transport control unit 184, and the power supply control unit 186.

[0023] The first drawing control unit 162 displays the electrode position of the wire electrode 60. The first drawing control unit 162 draws a machining path of the electrical discharge machining on the display device 124 before performing electrical discharge machining on the machining object W. The machining path is drawn with the electrode position as the starting position of the machining path.

[0024] The instruction receiving processing unit 160 receives instructions from the operator via an operating device (not shown). Assume that the instruction receiving processing unit 160 receives an interrupt request for instructing to perform electric discharge machining on another object before the electric discharge machining on the object W is completed. In this case, the machining control unit 150 interrupts the electric discharge machining on the object W.

[0025] The storage control unit 158 ​​stores the display position of the start position when the machining path is drawn in the storage device 122. The storage control unit 158 ​​stores the display position of the electrode position of the wire electrode 60 displayed on the display device 124 when the electrical discharge machining is interrupted as the display position of the interruption position of the electrical discharge machining interruption in the storage device 122. The storage control unit 158 ​​also stores the trajectory of the electrical discharge machining from the display position of the start position of the machining path to the display position of the interruption position of the electrical discharge machining in the storage device 122.

[0026] When the electric discharge machining of the object W interrupted in response to the interrupt request is restarted, the shift control unit 182 shifts the electrode position of the wire electrode 60 to the interruption position where the electric discharge machining was interrupted. When the electrode position moves to the interruption position, the second drawing control unit 164 redraws the machining path. The second drawing control unit 164 redraws the machining path using the display position of the start position stored in the storage device 122 as the start position for redrawing.

[0027] The second drawing control unit 164 redraws the trajectory of the electric discharge machining stored in the storage device 122 by overlapping it with the redrawn machining path. The second drawing control unit 164 displays the display position of the interruption position stored in the storage device 122. As described above, the electrode position of the wire electrode 60 is at the interruption position of the electric discharge machining. Therefore, the electrode position is displayed at the display position of the interruption position.

[0028] Figure 3 1 is a diagram illustrating a first object WA and a second object WB on a worktable 62. Initially, the first electrical discharge machining on the first object WA is started from a start position SA and performed along a machining path RA. Before the first electrical discharge machining is completed, an insertion request for instructing the second electrical discharge machining on the second object WB is received. In response to the insertion request, the first electrical discharge machining is interrupted at an interruption position IA on the machining path RA.

[0029] The wire electrode 60 moves to the start position SB of the second electrical discharge machining. When the connection of the wire electrode 60 is completed, the second electrical discharge machining starts from the start position SB and is performed along the machining path RB. When the first electrical discharge machining is restarted after the second electrical discharge machining is completed, the wire electrode 60 moves to the interruption position IA of the first electrical discharge machining. When the connection of the wire electrode 60 is completed, the first electrical discharge machining is restarted from the interruption position IA and is performed along the machining path RA.

[0030] Figure 4 1 is a diagram illustrating a machining path RA of the first electrical discharge machining for the first machining object WA drawn on the display device 124. Before the first electrical discharge machining is performed on the first machining object WA, the first drawing control unit 162 of the control device 20 draws the machining path RA of the first electrical discharge machining on the display device 124. The electrode position EP of the wire electrode 60 is located at the start position SA of the machining path RA. The machining path RA is drawn with the display position of the electrode position EP as the display position of the start position SA.

[0031] After the first electrical discharge machining starts, the displacement control unit 182 displaces the electrode position EP of the wire electrode 60 along the machining path RA. During this time, the transport drive unit 104 transports the wire electrode 60 and applies a voltage to the inter-electrode G through the machining power supply 30, thereby performing the first electrical discharge machining. Before the first electrical discharge machining is completed, if there is an interrupt request for instructing the second electrical discharge machining, the first electrical discharge machining is interrupted. Figure 5 1 is a diagram illustrating a trajectory TA of the first electric discharge machining drawn on the display device 124 when the first electric discharge machining is interrupted. Figure 5 The display position of the electrode position EP of the wire electrode 60 shown corresponds to the interruption position IA of the first electrical discharge machining interrupted in response to the insertion request.

[0032] The first drawing control unit 162 draws a trajectory TA of the first electrical discharge machining from the display position of the first electrical discharge machining start position SA to the display position of the interruption position IA (the display position of the electrode position EP) on the display device 124. The trajectory TA of the first electrical discharge machining corresponds to the section on the machining path RA where the first electrical discharge machining is performed on the first machining object WA.

[0033] The storage control unit 158 ​​stores the display position of the start position SA of the machining path RA drawn by the first drawing control unit 162 in the storage device 122. The storage control unit 158 ​​stores the display position of the electrode position EP of the wire electrode 60 as the display position of the interruption position IA of the first electrical discharge machining corresponding to the insertion request in the storage device 122. The storage control unit 158 ​​also stores the trajectory TA in the storage device 122.

[0034] The shift control unit 182 shifts the electrode position EP of the wire electrode 60 to the start position SB of the second electrical discharge machining. The first drawing control unit 162 displays the electrode position EP of the wire electrode 60 at the display position of the start position SB of the second electrical discharge machining. The first drawing control unit 162 deletes the machining path RA, the start position SA, and the trajectory TA of the first electrical discharge machining. The first drawing control unit 162 draws the machining path RB of the second electrical discharge machining on the display device 124. Figure 6 1 is a diagram illustrating a machining route RB for the second electrical discharge machining of the second machining object WB drawn on the display device 124. The electrode position EP of the wire electrode 60 is located at the start position SB of the machining route RB. The machining route RB is drawn with the display position of the electrode position EP as the display position of the start position SB.

[0035] After the second electrical discharge machining starts, the displacement control unit 182 displaces the electrode position EP of the wire electrode 60 along the machining path RB. During this time, the transport drive unit 104 transports the wire electrode 60, and the machining power supply 30 applies a voltage to the inter-electrode gap G, thereby performing the second electrical discharge machining. When the second electrical discharge machining is performed over the entire section of the machining path RB, the second electrical discharge machining is terminated.

[0036] Figure 7 2 is a diagram illustrating a trajectory TB of the second electrical discharge machining drawn on the display device 124 when the second electrical discharge machining is completed. The trajectory TB of the second electrical discharge machining coincides with all sections of the machining path RB. The first drawing control unit 162 draws the trajectory TB of the second electrical discharge machining on the display device 124 .

[0037] In order to restart the interrupted first electrical discharge machining of the first machining object WA, the displacement control unit 182 displaces the electrode position EP of the wire electrode 60 to the interruption position IA of the first electrical discharge machining. The second drawing control unit 164 displays the electrode position EP of the wire electrode 60 at the display position of the interruption position IA of the first electrical discharge machining. The second drawing control unit 164 deletes the machining path RB, the start position SB, and the trajectory TB of the second electrical discharge machining.

[0038] The second drawing control unit 164 reads the display position of the start position SA of the machining path RA stored in the storage device 122 from the storage device 122. The second drawing control unit 164 uses the display position as the start position SA for redrawing, and redraws the machining path RA on the display device 124. Thus, the operator can visually grasp the machining status after the restart on the redrawn machining path RA.

[0039] The second drawing control unit 164 reads the display position of the interruption position IA of the first electrical discharge machining and the trajectory TA of the first electrical discharge machining corresponding to the interruption request from the storage device 122. The second drawing control unit 164 displays the interruption position IA of the first electrical discharge machining on the display device 124 in an overlapping manner with the machining path RA. The second drawing control unit 164 redraws the trajectory TA of the first electrical discharge machining on the display device 124 in an overlapping manner with the machining path RA. Thus, the operator can visually grasp the machining status before the interruption on the redrawn machining path RA.

[0040] Figure 81 is a diagram illustrating a machining path RA and a trajectory TA of the first electrical discharge machining drawn on the display device 124 when the first electrical discharge machining is restarted. The electrode position EP of the wire electrode 60 is located at the interruption position IA of the first electrical discharge machining corresponding to the insertion request on the machining path RA. Therefore, the electrode position EP is displayed at the display position of the interruption position IA. Thus, the operator can visually confirm that the machining path RA is correctly redrawn and that the electrode position EP is located at the interruption position IA.

[0041] Fig. 9 , Fig.10 as well as Fig.11 1 is a flowchart showing a processing sequence related to the display method of the wire electrical discharge machining machine 10. This processing sequence is performed, for example, by the processing circuit 120 of the control device 20 executing a program stored in the storage device 122. When this processing sequence is started, in step S10, the displacement control unit 182 displaces the electrode position EP of the wire electrode 60 to the start position SA of the first electrical discharge machining.

[0042] In step S12, the first drawing control unit 162 displays the electrode position EP of the wire electrode 60 on the display device 124. In step S14, the first drawing control unit 162 draws the machining path RA of the first electrical discharge machining and the start position SA of the machining path RA on the display device 124. In step S16, the machining control unit 150 starts the first electrical discharge machining under the control of the shift control unit 182, the transport control unit 184, and the power supply control unit 186 according to the machining program.

[0043] In step S18, the machining control unit 150 determines whether the first electrical discharge machining is completed. If the execution of the machining program for the first electrical discharge machining is completed, the result is "Yes" in step S18. If the execution of the machining program for the first electrical discharge machining is not completed, the result is "No" in step S18. If the result is "Yes" in step S18, the present processing sequence is completed. If the result is "No" in step S18, the present processing sequence proceeds to step S20.

[0044] In step S20, the instruction reception processing unit 160 determines whether an insertion request for instructing the second electrical discharge machining is received from the operator. If "No" in step S20, the processing sequence returns to step S18. If "Yes" in step S20, the processing sequence proceeds to step S22.

[0045] In step S22, the machining control unit 150 interrupts the execution of the machining program for the first electrical discharge machining. Thus, the first electrical discharge machining is interrupted. The first drawing control unit 162 superimposes the trajectory TA of the first electrical discharge machining on the machining path RA and draws it on the display device 124. The first drawing control unit 162 displays the electrode position EP of the wire electrode 60 as the interruption position IA of the first electrical discharge machining on the display device 124.

[0046] In step S24, the storage control unit 158 ​​stores the display position of the start position SA of the machining path RA, the display position of the interruption position IA of the first electrical discharge machining, and the trajectory TA of the first electrical discharge machining in the storage device 122. In step S26, the shift control unit 182 shifts the electrode position EP of the wire electrode 60 to the start position SB of the second electrical discharge machining. In step S28, the first drawing control unit 162 displays the electrode position EP of the wire electrode 60 on the display device 124.

[0047] In step S30, the first drawing control unit 162 deletes the machining path RA, the start position SA, the interruption position IA, and the trajectory TA of the first electrical discharge machining from the display device 124. In step S32, the first drawing control unit 162 draws the machining path RB and the start position SB of the machining path RB of the second electrical discharge machining on the display device 124.

[0048] In step S34, the machining control unit 150 starts the second electrical discharge machining based on the control of the displacement control unit 182, the transport control unit 184, and the power supply control unit 186 according to the machining program. In step S36, the machining control unit 150 completes the execution of the machining program for the second electrical discharge machining. The second electrical discharge machining ends. The first drawing control unit 162 draws the trajectory TB of the second electrical discharge machining on the display device 124 so as to overlap the machining path RB.

[0049] In step S38, the displacement control unit 182 displaces the electrode position EP of the wire electrode 60 to the interruption position IA of the first electrical discharge machining. In step S40, the second drawing control unit 164 displays the electrode position EP of the wire electrode 60 on the display device 124. The second drawing control unit 164 displays the interruption position IA of the first electrical discharge machining on the display device 124. The interruption position IA is displayed at the display position of the electrode position EP.

[0050] In step S42, the second drawing control unit 164 deletes the machining path RB, the start position SB, and the trajectory TB of the second electrical discharge machining from the display device 124. In step S44, the second drawing control unit 164 acquires the display position of the start position SA of the machining path RA, the display position of the interruption position IA of the first electrical discharge machining, and the trajectory TA of the first electrical discharge machining from the storage device 122. Based on the acquisition content in step S44, the processing of steps S46, S48, and S50 is performed.

[0051] In step S46, the second drawing control unit 164 redraws the machining path RA of the first electrical discharge machining on the display device 124. In step S48, the second drawing control unit 164 superimposes the start position SA of the machining path RA and the interruption position IA of the first electrical discharge machining on the machining path RA, and displays the result on the display device 124. In step S50, the second drawing control unit 164 redraws the trajectory TA from the start to the interruption of the first electrical discharge machining on the display device 124.

[0052] In step S52, the machining control unit 150 restarts the first electrical discharge machining based on the control of the shift control unit 182, the transport control unit 184, and the power supply control unit 186 according to the machining program. In step S54, the machining control unit 150 completes the execution of the machining program for the first electrical discharge machining. The first electrical discharge machining ends. The second drawing control unit 164 overlaps the trajectory from the interruption position IA to the end position of the first electrical discharge machining on the machining path RA, and draws the continuation trajectory TA on the display device 124. When the processing of step S54 ends, this processing procedure ends.

[0053] The following additional remarks are disclosed in relation to the above-mentioned embodiment.

[0054] (Supplementary Note 1) A control device for a wire electric discharge machine, which performs electric discharge machining on a machining object (W) by moving a wire electrode (60) relative to the machining object (W), comprising: a first drawing control unit (162) which displays an electrode position (EP) of the wire electrode located at a starting position (SA) of the machining path before the wire electric discharge machine performs a first electric discharge machining on a first machining object (WA) along the machining path (RA), and draws the machining path on a display device (162) by using the display position of the electrode position as the display position of the starting position. 124); a storage control unit (158) which, when there is an insertion request for second discharge machining of a second machining object (WB) before the first discharge machining is completed, stores the display position of the start position when drawing the machining path in the storage device (122); and a second drawing control unit (164) which, when the wire discharge machining machine restarts the first discharge machining after the second discharge machining is completed, redraws the machining path on the display device using the display position stored in the storage device as the start position. Thus, the operator can visually grasp the machining status after the restart on the redrawn machining path.

[0055] (Supplementary Note 2) The control device of the wire discharge machining machine described in Supplementary Note 1 may be such that, when there is the insertion request, the storage control unit stores the display position of the start position together with the trajectory (TA) of the first discharge machining in the storage device, the trajectory (TA) of the first discharge machining being a trajectory from the display position of the start position to the display position of the interruption position (IA) of the first discharge machining interrupted according to the insertion request; and the second drawing control unit redraws the trajectory of the first discharge machining stored in the storage device on the display device in an overlapping manner with the redrawn machining path. Thus, the operator can visually grasp the machining status before the interruption on the redrawn machining path.

[0056] (Supplementary Note 3) The control device described in Supplementary Note 1 or Supplementary Note 2 may further include a shift control unit (182), which, after the second electrical discharge machining is completed, shifts the electrode position to the interruption position (IA) of the first electrical discharge machining interrupted according to the insertion request, and in the case of the insertion request, the storage control unit stores the display position of the start position together with the display position of the interruption position in the storage device, and when the electrode position moves to the interruption position, the second drawing control unit displays the display position of the interruption position stored in the storage device as the display position of the electrode position on the display device in an overlapping manner with the redrawn machining path. Thus, the operator can visually confirm that the machining path is correctly redrawn and that the electrode position is at the interruption position.

[0057] (Note 4) A display method for a wire electric discharge machine, which performs electric discharge machining on a machining object (W) by moving a wire electrode (60) relative to the machining object (W), comprising: a first drawing step, before the wire electric discharge machine performs first electric discharge machining on a first machining object (WA) along a machining path (RA), displaying an electrode position (EP) of the wire electrode located at a start position (SA) of the machining path, and drawing the machining path on a display device (124) by using the display position of the electrode position as the display position of the start position; a storage step (158), when there is an insertion request for second electric discharge machining on a second machining object (WB) before the first electric discharge machining is completed, storing the display position of the start position when drawing the machining path in a storage device (122); and a second drawing step (164), when the wire electric discharge machine restarts the first electric discharge machining after the second electric discharge machining is completed, redrawing the machining path on the display device by using the display position stored in the storage device as the start position. This allows the operator to visually grasp the machining status after the restart on the redrawn machining path.

[0058] (Supplementary Note 5) In the display method of the wire discharge machining machine described in Supplementary Note 4, in the storage step, when there is the insertion request, the display position of the start position may be stored in the storage device together with the trajectory (TA) of the first discharge machining, the trajectory (TA) of the first discharge machining being a trajectory from the display position of the start position to the display position of the interruption position (IA) of the first discharge machining interrupted according to the insertion request, and in the second drawing step, the trajectory of the first discharge machining stored in the storage device may be redrawn on the display device in an overlapping manner with the redrawn machining path. Thus, the operator can visually grasp the machining status before the interruption on the redrawn machining path.

[0059] (Supplementary Note 6) The display method for a wire discharge machine described in Supplementary Note 4 or 5 may further include a shifting step (182), wherein after the second discharge machining is completed, the electrode position is shifted to an interruption position (IA) of the first discharge machining interrupted in accordance with the insertion request, and in the storage step, when there is an insertion request, the display position of the start position is stored in the storage device together with the display position of the interruption position, and when the electrode position moves to the interruption position, in the second drawing step, the display position of the interruption position stored in the storage device is displayed on the display device as the display position of the electrode position, overlapping with the redrawn machining path. Thus, the operator can visually confirm that the machining path is correctly redrawn and that the electrode position is at the interruption position.

[0060] Although the embodiments of the present disclosure have been described in detail, the present disclosure is not limited to the above embodiments. The above embodiments may be subjected to various additions, substitutions, changes, partial deletions, etc. without departing from the scope of the main idea of ​​the invention or the scope of the idea and main idea of ​​the present invention derived from the contents recorded in the claims and their equivalents. For example, in the above embodiments, the order of each action or the order of each process is shown as an example and is not limited thereto. Explanation of symbols

[0061] 10…wire discharge machine, 20…control device, 30…machining power source, 60…wire electrode, 62…work table, 64…upper wire guide, 66…lower wire guide, 68…upper guide block, 70…upper punch guide, 72…lower guide block, 74…lower punch guide, 76…wire reel, 78…roller, 84…pinch roller, 86…feed roller, 88…recovery box, 90…machining tank, 92…floor, 102…shift drive unit, 104…transport drive unit, 120…processing circuit, 122…storage device, 124…display device, 150…machining control unit, 158…storage control unit, 160…instruction receiving processing unit, 162…first drawing control unit, 164…second drawing control unit, 182…shift control unit, 184…transport control unit, 186…power supply control unit.

Claims

1. A control device for a wire electrical discharge machine, which performs electrical discharge machining on an object to be machined (W) by moving a wire electrode (60) relative to the object to be machined, characterized in that: have: a first drawing control unit (162) for displaying an electrode position (EP) of the wire electrode located at a start position (SA) of the machining path before the wire electrical discharge machine performs a first electrical discharge machining on a first machining object (WA) along the machining path (RA), and drawing the machining path on a display device (124) by using the display position of the electrode position as the display position of the start position; a storage control unit (158) for storing the display position of the start position when the machining path is drawn in a storage device (122) when there is a request for inserting a second electrical discharge machining on a second machining object (WB) before the first electrical discharge machining is completed; as well as A second drawing control unit (164) redraws the machining path on the display device using the display position stored in the storage device as the start position when the wire electrical discharge machining restarts the first electrical discharge machining after the second electrical discharge machining is completed.

2. The control device for the wire electrical discharge machine according to claim 1, characterized in that: When the insertion request is present, the storage control unit stores the display position of the start position together with the trajectory (TA) of the first electrical discharge machining in the storage device, the trajectory (TA) of the first electrical discharge machining being a trajectory from the display position of the start position to the display position of the interruption position (IA) of the first electrical discharge machining interrupted according to the insertion request, The second drawing control unit redraws the trajectory of the first electrical discharge machining stored in the storage device on the display device so as to overlap with the redrawn machining path.

3. The control device for a wire electrical discharge machine according to claim 1 or 2, characterized in that: The control device of the wire electrical discharge machine further comprises a shift control unit (182) which shifts the electrode position to an interruption position (IA) of the first electrical discharge machining interrupted in accordance with the insertion request after the second electrical discharge machining is completed. When the interrupt request is present, the storage control unit stores the display position of the start position together with the display position of the interrupt position in the storage device, When the electrode position moves to the interruption position, the second drawing control unit displays the display position of the interruption position stored in the storage device as the display position of the electrode position on the display device in an overlapping manner with the redrawn processing path.

4. A display method for a wire electrical discharge machine, wherein the wire electrode (60) is moved relative to an object to be processed (W) to perform electrical discharge processing on the object to be processed, characterized in that: have: A first drawing step is to display an electrode position (EP) of the wire electrode located at a start position (SA) of the machining path before the wire electrical discharge machine performs a first electrical discharge machining on a first machining object (WA) along the machining path (RA), and to draw the machining path on a display device (124) by using the display position of the electrode position as the display position of the start position. a storing step of storing the display position of the start position when the machining path is drawn in a storage device (122) when there is a request for inserting a second electrical discharge machining on a second machining object (WB) before the first electrical discharge machining is completed; as well as The second drawing step is to redraw the machining path on the display device by using the display position stored in the storage device as the start position when the wire electrical discharge machine restarts the first electrical discharge machining after the second electrical discharge machining is completed.

5. The display method for a wire electrical discharge machine according to claim 4, characterized in that: In the storing step, when there is the insertion request, the display position of the start position is stored in the storage device together with a trajectory (TA) of the first electrical discharge machining, the trajectory (TA) of the first electrical discharge machining being a trajectory from the display position of the start position to a display position of an interruption position (IA) of the first electrical discharge machining interrupted according to the insertion request; In the second drawing step, the trajectory of the first electrical discharge machining stored in the storage device is redrawn on the display device so as to overlap with the redrawn machining path.

6. The display method for a wire electrical discharge machine according to claim 4 or 5, characterized in that: The display method for the wire electric discharge machine further comprises a shifting step, in which, after the second electric discharge machining is completed, the electrode position is shifted to an interruption position (IA) of the first electric discharge machining interrupted in accordance with the insertion request, In the storing step, when there is the interrupt request, the display position of the start position is stored in the storage device together with the display position of the interrupt position, When the electrode position moves to the interruption position, in the second drawing step, the display position of the interruption position stored in the storage device is displayed on the display device as the display position of the electrode position so as to overlap with the redrawn processing path.

Images