Electrical discharge machine

Abstract

The present invention provides an electric discharge machine that can suppress the use of the electric discharge machine (10) in a high-risk state. The electric discharge machine of the present invention includes: a display control unit (74) at the time of setting change, which displays an attention-arousing display (98) at the time of setting change when the risk level corresponding to the setting content indicated by the user is equal to or higher than an attention-arousing threshold; and a display control unit (76) after setting change, which displays an attention-arousing display (102) after setting change every time a predetermined time interval elapses when the state where the risk level is equal to or higher than the attention-arousing threshold continues.

Description

Technical Field

[0001] The present invention relates to an electric discharge machining apparatus. Background Art

[0002] Japanese Patent Publication No. 3856603 discloses a wire electric discharge machining apparatus that applies a pulsed voltage between a wire electrode and a workpiece to machine the workpiece. There are various setting items in electric discharge machining apparatuses such as wire electric discharge machining apparatuses. The electric discharge machining apparatus operates according to the preset setting content. Summary of the Invention

[0003] However, when the electric discharge machining apparatus is used in a state where the setting items are changed to setting contents different from the recommended setting contents, sometimes it may have an adverse effect on the electric discharge machining apparatus itself or the machining of the workpiece to be machined.

[0004] An object of the present invention is to provide an electric discharge machining apparatus that can suppress the use of the electric discharge machining apparatus in a high-risk state.

[0005] An electric discharge machining apparatus according to one aspect of the present invention is an electric discharge machining apparatus having a control device that performs electric discharge machining on a workpiece by causing electric discharge between an electrode and the workpiece. The electric discharge machining apparatus includes: a risk level storage unit that stores a risk level corresponding to the setting content of various setting items of the control device; a first determination unit that, when a user instructs a change in the setting content of a certain setting item among a plurality of preset setting items to a setting content other than the recommended setting content, the first determination unit determines whether the risk level corresponding to the setting content instructed by the user is above a caution threshold based on the risk level stored in the risk level storage unit; a display control unit at the time of setting change that, when the first determination unit determines that the risk level corresponding to the setting content instructed by the user is above the caution threshold, the display control unit at the time of setting change displays a caution display at the time of setting change, that is, a caution display at the time of setting change, on a display unit; a second determination unit that determines whether a state where the risk level is above the caution threshold continues after the display of the caution display at the time of setting change; and a display control unit after setting change that, when the second determination unit determines that the state where the risk level is above the caution threshold continues, the display control unit after setting change displays a caution display after setting change, that is, a caution display after setting change, on the display unit every time a predetermined time interval elapses.

[0006] According to the present invention, an electric discharge machining apparatus that can suppress the use of the electric discharge machining apparatus in a high-risk state can be provided. Brief Description of the Drawings

[0007] Figure 1 A perspective view showing an electric discharge machine according to an embodiment.

[0008] Figure 2 A block diagram showing a part of an electric discharge machine according to an embodiment.

[0009] Figure 3 A diagram showing an example of setting items of a control device.

[0010] Figure 4 A diagram showing an example of a display screen of a display unit.

[0011] Figure 5A and Figure 5B A diagram showing an example of a display screen of a display unit.

[0012] Figure 6 A diagram showing an example of a caution call-up display at the time of setting change.

[0013] Figure 7 A diagram showing an example of a caution call-up display after setting change.

[0014] Figure 8 A diagram showing an example of a list screen.

[0015] Figure 9 A diagram showing an example of a list screen.

[0016] Figure 10 A flowchart showing the operation of an electric discharge machine according to an embodiment.

[0017] Figure 11 A block diagram showing a part of a modified example of an electric discharge machine according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, preferred embodiments will be listed and the electric discharge machine of the present invention will be described in detail with reference to the accompanying Figure 1 drawings.

[0019] [One Embodiment]

[0020] An electric discharge machine according to an embodiment will be described with reference to the drawings. Figure 1 A perspective view showing the electric discharge machine of the present embodiment. Here, the case where the electric discharge machine 10 is a wire electric discharge machine will be described as an example, but the electric discharge machine 10 is not limited to a wire electric discharge machine.

[0021] The electric discharge machine 10, that is, the wire electric discharge machine, performs electric discharge machining on a workpiece W (reference Figure 2) A machine tool that applies a voltage to the wire electrode 12 and the workpiece W to generate a discharge between the poles formed by the workpiece W and the wire electrode 12, thereby performing electrical discharge machining on the workpiece W. The electrical discharge machine 10 is equipped with a machine tool main body 14, a machining fluid treatment device 16, and a control device 18.

[0022] The material of the wire electrode 12 is, for example, a metal material such as tungsten-based, copper alloy-based, or brass-based. On the other hand, the material of the workpiece W is, for example, a metal material such as an iron-based material or a carbide material.

[0023] The machine tool main body 14 is equipped with a supply system 20a and a recovery system 20b. The supply system 20a supplies the wire electrode (electrode) 12 to the workpiece (workpiece, object to be machined) W. The recovery system 20b recovers the wire electrode 12 after it passes through the workpiece W.

[0024] The supply system 20a is equipped with a spool 22, a torque motor 24, and a brake shoe 26. The unused wire electrode 12 is wound around the spool 22. The torque motor 24 applies torque to the spool 22. The brake shoe 26 applies a braking force based on friction to the wire electrode 12. The supply system 20a is also equipped with a brake motor 28 and a wire guide (upper wire guide) 32. The brake motor 28 applies a braking torque to the brake shoe 26. The wire guide 32 guides the wire electrode 12 above the workpiece W. The torque motor 24 and the brake motor 28 are equipped with encoders EC1 and EC2 for detecting the rotational position or rotational speed. The control device 18 can perform feedback control on the torque motor 24 and the brake motor 28 so that the rotational speeds of the torque motor 24 and the brake motor 28 become a specified rotational speed according to the detection signals detected by the encoders EC1 and EC2. Furthermore, the supply system 20a may also be equipped with a tension detection unit 30 for detecting the magnitude of the tension of the wire electrode 12.

[0025] The recovery system 20b is equipped with a wire guide (lower wire guide) 34, pinch rollers 36, and feed rollers 38. The wire guide 34 guides the wire electrode 12 below the workpiece W. The pinch rollers 36 and the feed rollers 38 can clamp the wire electrode 12. The recovery system 20b is also equipped with a torque motor 40 for applying torque to the feed rollers 38. The recovery system 20b is also equipped with a recovery box 42. The recovery box 42 recovers the used wire electrode 12 conveyed by the pinch rollers 36 and the feed rollers 38. The torque motor 40 is equipped with an encoder EC3 for detecting the rotational position or rotational speed. The control device 18 can perform feedback control on the torque motor 40 so that the rotational speed of the torque motor 40 becomes a specified rotational speed according to the detection signal detected by the encoder EC3.

[0026] The processing machine main body 14 is equipped with a processing tank 46 that can retain the processing fluid used during electrical discharge machining. The processing fluid is deionized water, oil, etc. The processing tank 46 is placed on the base portion 48. The wire guides 32 and 34 are arranged inside the processing tank 46. A workpiece W is disposed between the wire guide 32 and the wire guide 34. The wire guides 32 and 34 are equipped with eye mold guides 32a and 34a that respectively support the wire electrode 12. In addition, the wire guide 34 is also equipped with a guide roller 34b. The guide roller 34b guides the wire electrode 12 toward the pinch roller 36 and the feed roller 38 while changing the orientation of the wire electrode 12.

[0027] Furthermore, the wire guide 32 sprays clean processing fluid that does not contain machining chips (sludge) toward the gap between the wire electrode 12 and the workpiece W. Thereby, the gap can be filled with clean processing fluid suitable for electrical discharge machining, and thus it is possible to prevent a reduction in the accuracy of electrical discharge machining due to the sludge generated by electrical discharge machining. In addition, the wire guide 34 can also spray clean processing fluid that does not contain sludge toward the gap.

[0028] The workpiece W is supported by a worktable (not shown) that can move in the X direction and the Y direction. The wire guides 32 and 34, the workpiece W, and the worktable are immersed in the processing fluid retained by the processing tank 46.

[0029] When a starting hole that serves as the starting point of electrical discharge machining is formed in the workpiece W, the wire electrode 12 is inserted through the starting hole to connect the wire electrode 12. In such a case, the gap between the starting hole of the workpiece W and the wire electrode 12 becomes the inter-electrode gap. In addition, when a machining groove that serves as the starting point of electrical discharge machining is formed in the workpiece W, the wire electrode 12 is inserted through the machining groove to connect the wire electrode 12. In such a case, the gap between the machining groove and the wire electrode 12 becomes the inter-electrode gap. In such a case, after inserting the wire electrode 12 through the starting hole or machining groove of the workpiece W and connecting it, the electrical discharge machine 10 feeds out the wire electrode 12 in the downward direction (-Z direction) toward the workpiece W while moving the worktable (workpiece W) on a plane parallel to the XY plane. Thereby, the workpiece W can be machined. Connecting the wire electrode 12 means threading the wire electrode 12 wound around the wire spool 22 through the wire guide 32, the workpiece W, and the wire guide 34 and clamping it with the pinch rollers 36 and the feed rollers 38. When the wire electrode 12 has been connected, a predetermined tension is applied to the wire electrode 12. Furthermore, the X direction and the Y direction are orthogonal to each other, and the direction orthogonal to the XY plane (horizontal plane) is set as the Z direction. Furthermore, a starting hole or a machining groove that serves as the starting point of electrical discharge machining is not necessarily formed on the workpiece W. For example, machining may sometimes start from the end face of the workpiece W. That is, cutting may sometimes start from the end face of the workpiece W. In such a case, machining can start from the end face of the workpiece W without inserting the wire electrode 12 through the starting hole or the machining groove.

[0030] The machining fluid treatment device 16 is a device that manages the quality of the machining fluid by removing machining chips generated in the machining groove 46 and adjusting the specific resistance (resistivity), temperature, etc. The machining fluid after the quality is managed by the machining fluid treatment device 16 is sent back to the machining groove 46 again, and the machining fluid is sprayed at least from the wire guide 32. The control device 18 can control the machine main body 14 and the machining fluid treatment device 16.

[0031] Figure 2 It is a block diagram showing a part of the electrical discharge machine of the present embodiment.

[0032] As Figure 2 shown, the machine main body 14 is equipped with a power supply control unit 50 and a power supply unit 52. Furthermore, as described above Figure 1 using, the machine main body 14 is also equipped with components other than these components, but Figure 2 only a part of the components is shown here.

[0033] The power supply control unit 50 controls the power supply unit 52 to repeatedly apply voltage to the workpiece W and the wire electrode 12 at each predetermined cycle. That is, the power supply control unit 50 determines the application conditions such as the voltage value, pulse width, and pulse interval of the voltage pulse to be applied based on the information supplied from the control device 18. When the application conditions are determined, the power supply control unit 50 generates a drive pulse signal for driving the power supply unit 52 to apply voltage under the determined application conditions, and outputs the generated drive pulse signal to the power supply unit 52.

[0034] The power supply unit 52 repeatedly applies voltage pulses to the workpiece W and the wire electrode 12 at each predetermined cycle according to the drive pulse signal. In addition, Figure 2 In the example, a start hole Wh is formed in the workpiece W, and the wire electrode 12 is inserted into the start hole Wh.

[0035] The electric discharge machine 10 is also provided with a voltage detection unit 54. The voltage detection unit 54 can detect the voltage between the electrodes (inter-electrode voltage). Information indicating the inter-electrode voltage detected by the voltage detection unit 54 can be supplied to the control device 18.

[0036] The control device 18 is in charge of the control of the entire electric discharge machine 10. The control device 18 is provided with an arithmetic unit 56, a storage unit 58, and a communication unit 86. The arithmetic unit 56 can be constituted by a processor such as a CPU (Central Processing Unit), but is not limited thereto. The storage unit 58 is provided with a volatile memory (not shown) and a non-volatile memory (not shown), for example. As the volatile memory, for example, RAM (Random Access Memory) etc. can be cited. As the non-volatile memory, for example, ROM (Read Only Memory), flash memory etc. can be cited. Programs, data, tables, etc. can be stored in the storage unit 58. The communication unit 86 is used for communication with an information management device 88 etc. described later.

[0037] The arithmetic unit 56 is provided with an acquisition unit 60, a machining control unit 62, a first determination unit 63, a second determination unit 64, a setting change unit 65, and a display control unit 66. The acquisition unit 60, the machining control unit 62, the first determination unit 63, the second determination unit 64, the setting change unit 65, and the display control unit 66 can be realized by the arithmetic unit 56 executing the programs stored in the storage unit 58.

[0038] The acquisition unit 60 can acquire information etc. supplied from the voltage detection unit 54 etc. The information acquired by the acquisition unit 60 can be supplied to the machining control unit 62 etc.

[0039] The machining control unit 62 appropriately controls the power control unit 50 and the like based on the information acquired by the acquisition unit 60 and the preset setting content, etc., thereby performing electrical discharge machining on the workpiece W.

[0040] The electric discharge machine 10 is also provided with a display unit 68 and an operation unit 70.

[0041] The display unit (display) 68 can be constituted by, for example, a liquid crystal display, etc., but is not limited thereto. A display screen 72 is provided on the display unit 68.

[0042] The operation unit 70 can be constituted by, for example, a touch panel, a keyboard, a mouse, etc. not shown in the figure. The touch panel can be provided on the display screen 72 of the display unit 68. The user can give an instruction to the control device 18 by operating the operation unit 70. For example, the user can select a selection button, an icon, etc. by operating the touch panel, the mouse, etc.

[0043] The display control unit 66 can control the display to the display unit 68. The display control unit 66 is provided with a display control unit 74 when the setting is changed, a display control unit 76 after the setting is changed, and a list screen display control unit 78.

[0044] There are various setting items in the control device 18. These setting items are preferably set to the recommended setting content recommended by the manufacturer of the electric discharge machine 10. However, there may be a case where the user changes the setting content of the setting item to a setting content other than the recommended setting content. When the electric discharge machine 10 is used in a state where the setting content of the setting item is changed to a setting content other than the recommended setting content, it may have an adverse effect on the electric discharge machine 10 itself, and may also have an adverse effect on the machining of the workpiece W. Therefore, in the present embodiment, when a setting change that raises the risk occurs, a caution display is performed as described later, and further, when the high-risk state continues, the caution display is repeated as described later.

[0045] Figure 3 It is a diagram showing an example of the setting items of the control device. Figure 3 A part of various setting items of the control device 18 is shown. Figure 3 The setting items related to "mechanical action at the time of alarm" are shown. That is, Figure 3 The setting items related to the alarm are shown.

[0046] As Figure 3As shown, there is a setting item such as "specific resistance alarm". The setting item "specific resistance alarm" is a setting item regarding the operation of the electric discharge machine 10 when a specific resistance alarm is issued. The so-called specific resistance alarm is an alarm issued when the specific resistance of the processing fluid is no longer within the recommended range. The recommended value of the specific resistance (resistivity) of the processing fluid is, for example, about 70,000 Ω·cm. When the specific resistance of the processing fluid excessively decreases relative to the recommended value, there is a concern that the processing of the workpiece W to be processed becomes unstable and the accuracy of the processing dimensions decreases. The specific resistance value of the processing fluid can be adjusted by the processing fluid treatment device 16. The processing fluid treatment device 16 uses, for example, an ion exchange resin (not shown) to adjust the specific resistance value of the processing fluid. If such an ion exchange resin deteriorates, it becomes difficult for the processing fluid treatment device 16 to adjust the specific resistance of the processing fluid to within the recommended range. To maintain the specific resistance of the processing fluid within the recommended range, it is necessary to replace the ion exchange resin as appropriate. As the setting content of the setting item "specific resistance alarm", as Figure 3 shown, there are, for example, "warning", "stop after processing", and "stop immediately". "Stop after processing" is the initial value of this setting item. That is, "stop after processing" is the recommended setting content of this setting item. In the state where this setting item is set to "stop after processing", when the specific resistance of the processing fluid is no longer within the recommended range, the operation of the electric discharge machine 10 stops at the stage where the processing of the workpiece W being processed has ended. It is not recommended to change this setting item from "stop after processing" to "warning" or "stop immediately". However, there may be a case where the user changes the setting content of this setting item to "warning" or "stop immediately". When this setting item is changed to "warning", although a warning is issued when the specific resistance of the processing fluid becomes outside the recommended range, the electric discharge machine 10 can continue to be used after the electric discharge machining of the workpiece W is completed. That is, in such a case, after the electric discharge machine 10 finishes processing the workpiece W being processed, it can further process other workpieces. When the electric discharge machine 10 continues to be used despite the fact that the specific resistance of the processing fluid has become outside the recommended range, there is a concern about having an adverse effect on the electric discharge machine 10 itself. That is, in such a case, there is a concern about having an adverse effect on the electric discharge machine 10. In addition, when the electric discharge machine 10 continues to be used despite the fact that the specific resistance of the processing fluid has become outside the recommended range, there is a concern that the processing of the workpiece W becomes unstable and the accuracy of the processing dimensions decreases. That is, in such a case, there is a concern about having an adverse effect on the processing of the workpiece W. As Figure 3As shown, when the setting item is changed to "Warning", the risk level is set to 9, for example. Furthermore, such a risk level is comprehensively determined based on the risk of having an adverse effect on the electric discharge machine 10 itself, the risk of having an adverse effect on the machining of the workpiece W, and the like. When the setting item is changed to "Stop immediately", the electric discharge machine 10 will stop immediately when the specific resistance of the machining fluid goes out of the recommended range. When the electric discharge machine 10 stops immediately while the workpiece W is being machined, there is a concern that a good product may not be obtained. As Figure 3 shown, when the setting item is changed to "Stop immediately", the risk level is set to 9, for example. Furthermore, as Figure 3 shown, when the setting item is set to "Stop after machining", the risk level is set to 3, for example.

[0047] As Figure 3 shown, there is, for example, a setting item of "Specific resistance detection electrode alarm". The setting item of "Specific resistance detection electrode alarm" is a setting item regarding the operation of the electric discharge machine 10 when a specific resistance detection electrode alarm is issued. The specific resistance detection electrode alarm is an alarm issued when the maintenance period of the specific resistance detection electrode, which is an electrode for detecting the specific resistance of the machining fluid, expires. The maintenance of the specific resistance detection electrode is, for example, cleaning of the specific resistance detection electrode, but is not limited thereto. The maintenance period of the specific resistance detection electrode is, for example, 1 month, but is not limited thereto. As the setting content of the setting item of "Specific resistance detection electrode alarm", as Figure 3As shown, there are, for example, "Warning" and "Stop after processing". "Stop after processing" is the initial value of this setting item. That is, "Stop after processing" is the recommended setting content for this setting item. In the state where this setting item is set to "Stop after processing", when the maintenance period of the specific resistance detection electrode has expired, the operation of the electric discharge machine 10 will stop at the stage where the processing of the work piece W being processed has ended. It is not recommended to change this setting item from "Stop after processing" to "Warning". However, there may be a situation where the user changes the setting content of this setting item to "Warning". When this setting item is changed to "Warning", although a warning will be issued when the maintenance period of the specific resistance detection electrode expires, the electric discharge machine 10 can continue to be used after the electric discharge machining of the work piece W is completed. That is, in such a case, after the electric discharge machine 10 finishes processing the work piece W being processed, it can further process other work pieces W. When the electric discharge machine 10 is continued to be used despite the expiration of the maintenance period of the specific resistance detection electrode, even if the specific resistance of the processing fluid has changed outside the recommended range, the situation that the specific resistance of the processing fluid has become outside the recommended range cannot be detected, and there is a concern about having an adverse effect on the electric discharge machine 10 itself. That is, in such a case, there is a concern about having an adverse effect on the electric discharge machine 10. In addition, when the electric discharge machine 10 is continued to be used despite the expiration of the maintenance period of the specific resistance detection electrode, even if the specific resistance of the processing fluid has changed outside the recommended range, the situation that the specific resistance of the processing fluid has become outside the recommended range cannot be detected, and there is a concern that the processing of the work piece W becomes unstable and the accuracy of the processing dimensions decreases. That is, in such a case, there is a concern about having an adverse effect on the processing of the work piece W. As Figure 3 shown, the risk level in the case where this setting item is changed to "Warning" is set to 9, for example. Furthermore, as Figure 3 shown, the risk level in the case where this setting item is set to "Stop after processing" is set to 3, for example.

[0048] As Figure 3As shown, there is a setting item of "start from the middle of the program". The setting item of "start from the middle of the program" is a setting item regarding the operation of the electric discharge machine 10 when a start key (not shown) is pressed in a state where the pointer is at a position other than the start of the program. The start key is used to start the electric discharge machining of the electric discharge machine 10. The start key can be a mechanical switch or the like, and can also be displayed on the display screen 72 of the display unit 68. Such a program is a program for machining a workpiece W, and specifically, is a program for instructing linear movement, curved movement, discharge on / off, etc. Usually, the start key is pressed in a state where the pointer is at the start part of the program displayed on the display screen 72 of the display unit 68, thereby starting the electric discharge machining of the workpiece W. When starting the electric discharge machining in a state where the pointer is at a position other than the start of the program, the part of the program before the position of the pointer will not be executed, and only the part of the program after the position of the pointer will be executed. Therefore, in such a case, it is impossible to accurately machine the workpiece W. As the setting content of the setting item of "start from the middle of the program", as Figure 3 shown, for example, there are "prohibited", "permitted", and "warning". "Prohibited" is the initial value of this setting item. That is, "prohibited" is the recommended setting content of this setting item. When this setting item is set to "prohibited", even if the start key is pressed in a state where the pointer is at a position other than the start of the program, the electric discharge machine 10 will not start the electric discharge machining. It is not recommended to change this setting item from "prohibited" to "permitted" or "warning". However, it is possible that the user changes the setting content of this setting item to "permitted" or "warning". When this setting item is changed to "permitted", when the start key is pressed in a state where the pointer is at a position other than the start of the program, the electric discharge machine 10 will perform the electric discharge machining. When the electric discharge machining of the electric discharge machine 10 is performed in a state where the pointer is at a position other than the start of the program, there is a concern that the electric discharge machine 10 will perform abnormal operations and the workpiece W will be machined into an unexpected shape. As Figure 3 shown, the risk level when this setting item is changed to "permitted" is set to 8, for example. When this setting item is changed to "warning", when the start key is pressed in a state where the pointer is at a position other than the start of the program, a warning will be issued, and when the start key is pressed again, the electric discharge machine 10 will perform the electric discharge machining. When the electric discharge machining of the electric discharge machine 10 is started in a state where the pointer is at a position other than the start of the program, there is a concern that the electric discharge machine 10 will perform abnormal operations and the workpiece W will be machined into an unexpected shape. As Figure 3 shown, the risk level when this setting item is changed to "warning" is set to 8, for example. Furthermore, as Figure 3As shown, when the setting item is set to "Prohibited", the risk level is set to 3, for example.

[0049] As Figure 3 shown, there is a setting item of "Start from a position other than the breakpoint position". The setting item of "Start from a position other than the breakpoint position" is a setting item regarding the resumption of electrical discharge machining when the start key is pressed in a state where the machining resume position is at a position other than the machining interruption position. The machining interruption position, i.e., the machining interruption point, is the position where the electrical discharge machining is interrupted. The machining resume position is the position where the machining resumes. As the setting content of the setting item of "Start from a position other than the breakpoint position", as Figure 3 shown, there are, for example, "Prohibited" and "Warning". "Prohibited" is the initial value of this setting item. That is, "Prohibited" is the recommended setting content of this setting item. When this setting item is set to "Prohibited", even if the start key is pressed in a state where the machining resume position is at a position other than the machining interruption position, the electrical discharge machining will not resume. It is not recommended to change this setting item from "Prohibited" to "Warning". However, it is possible that the user changes the setting content of this setting item to "Warning". When this setting item is changed to "Warning", when the start key is pressed in a state where the machining resume position is at a position other than the machining interruption position, a warning will be issued, and when the start key is pressed again, the electrical discharge machining will resume from a position other than the machining interruption position. When the electrical discharge machining resumes from a position other than the machining interruption position, there is a concern that the electrical discharge machine 10 will perform abnormal actions and the workpiece W will be machined into an unintended shape. As Figure 3 shown, when this setting item is changed to "Warning", the risk level is set to 8, for example. Furthermore, as Figure 3 shown, when this setting item is set to "Prohibited", the risk level is set to 3, for example.

[0050] As Figure 3As shown, there is a setting item of "Vertical Line Confirmation at Program Startup". The setting item of "Vertical Line Confirmation at Program Startup" is a setting item for confirming whether the wire electrode 12 is in the vertical position pre-registered as the initial position. Such confirmation is performed when the program is started. When the program is started, the position of the wire electrode 12 is preferably the vertical position pre-registered as the initial position. That is, when the program is started, the extension direction of the wire electrode 12 is preferably the vertical position pre-registered as the initial position. For example, when the length direction of a specified part in the wire electrode 12 is the Z direction, it can be determined that the wire electrode 12 is in the vertical position, but it is not limited thereto. If machining starts when the wire electrode 12 is not in the vertical position, there is a concern that the discharge machining machine 10 will perform abnormal operations and the workpiece W will be machined into an unintended shape. Furthermore, depending on the machining content, the wire electrode 12 may be tilted after machining starts to machine the workpiece W. As the setting content of the setting item of "Vertical Line Confirmation at Program Startup", as Figure 3 shown, for example, there are "Prohibited", "Invalid", and "Valid". "Prohibited" is the initial value of this setting item. That is, "Prohibited" is the recommended setting content of this setting item. When this setting item is set to "Prohibited", a check is made as to whether the wire electrode 12 is in the vertical position when the start key is pressed. If the wire electrode 12 is not in the vertical position, the discharge machining of the discharge machining machine 10 is prohibited. It is not recommended to change this setting item from "Prohibited" to "Valid" or "Invalid". However, it is possible that the user may change the setting content of this setting item to "Valid" or "Invalid". When this setting item is changed to "Valid", a check is made as to whether the wire electrode 12 is in the vertical position when the start key is pressed. If the wire electrode 12 is not in the vertical position, a warning is issued, and when the start key is pressed again, the discharge machining machine 10 performs discharge machining. If the discharge machining machine 10 performs discharge machining even though the wire electrode 12 is not in the vertical position, there is a concern that the discharge machining machine 10 will perform abnormal operations and the workpiece W will be machined into an unintended shape. As Figure 3 shown, the risk level when this setting item is changed to "Valid" is set to 8, for example. When this setting item is changed to "Invalid", a check is not made as to whether the wire electrode 12 is in the vertical position when the start key is pressed. Since a check is not made as to whether the wire electrode 12 is in the vertical position, it is also possible that the discharge machining of the discharge machining machine 10 starts when the wire electrode 12 is not in the vertical position. If the discharge machining of the discharge machining machine 10 starts when the wire electrode 12 is not in the vertical position, there is a concern that the discharge machining machine 10 will perform abnormal operations and the workpiece W will be machined into an unintended shape. As Figure 3As shown, when the setting item is changed to "invalid", the risk level is set to 8, for example. Furthermore, as Figure 3 shown, when the setting item is set to "prohibited", the risk level is set to 3, for example.

[0051] As Figure 3 shown, there is a setting item of "Machine operation during cooler alarm". The setting item of "Machine operation during cooler alarm" is a setting item regarding the operation of the electric discharge machine 10 when a cooler alarm is issued. The cooler alarm is an alarm issued when something goes wrong with the cooler for cooling the machining fluid. As the setting content of the setting item of "Machine operation during cooler alarm", as Figure 3 shown, there are, for example, "Stop after machining", "Warning", and "Stop immediately". "Stop after machining" is the initial value of this setting item. That is, "Stop after machining" is the recommended setting content of this setting item. In the state where this setting item is set to "Stop after machining", when a cooler alarm is issued, the operation of the electric discharge machine 10 stops at the stage where the machining of the workpiece W being machined has ended. It is not recommended to change this setting item from "Stop after machining" to "Warning" or "Stop immediately". However, it is possible that the user changes the setting content of this setting item to "Warning" or "Stop immediately". When this setting item is changed to "Warning", although a warning is issued when a cooler alarm is issued, the electric discharge machine 10 can continue to be used after the electric discharge machining of the workpiece W is completed. When a cooler alarm is issued, there is a concern that the temperature of the machining fluid may go outside the recommended range. When the electric discharge machining of this electric discharge machine 10 is performed although the temperature of the machining fluid has gone outside the recommended range, there is a concern that the accuracy of the machining size may be extremely reduced. That is, in such a case, there is a concern that it may have an adverse effect on the machining of the workpiece W. As Figure 3 shown, when this setting item is changed to "Warning", the risk level is set to 8, for example. When this setting item is changed to "Stop immediately", the electric discharge machine 10 stops immediately when a cooler alarm is issued. When the electric discharge machine 10 stops immediately while the workpiece W is being machined, there is a concern that a good product may not be obtained. Figure 3 shown, when this setting item is changed to "Stop immediately", the risk level is set to 8, for example. Furthermore, as Figure 3 shown, when this setting item is set to "Stop after machining", the risk level is set to 3, for example.

[0052] Furthermore, as setting items related to "mechanical actions during alarms", there are also setting items other than those described above, but they are omitted here for simplicity of explanation. In addition, there are setting items in the control device 18 other than those related to "mechanical actions during alarms", but they are omitted here for simplicity of explanation.

[0053] Figure 4 A diagram showing an example of the display screen of the display unit. Figure 4 A part of the display screen 72 of the display unit 68 is shown. Figure 4 A part of the setting items related to "mechanical actions during alarms" is shown.

[0054] The current setting contents of each setting item are displayed in each input box 92A to 92F. The input box 92A is an input box related to the setting item of "specific resistance alarm". The input box 92B is an input box related to the setting item of "specific resistance detection electrode alarm". The input box 92C is an input box related to the setting item of "start from the middle of the program". The input box 92D is an input box related to the setting item of "start from a position other than the breakpoint". The input box 92E is an input box related to the setting item of "line perpendicular confirmation at program startup". The input box 92F is an input box related to the setting item of "mechanical actions during cooler alarm".

[0055] Figure 4 An example is shown where the setting contents of setting items such as "specific resistance alarm" and "specific resistance detection electrode alarm" are respectively set to "stop after processing". In addition, Figure 4 An example is shown where the setting contents of setting items such as "start from the middle of the program", "start from a position other than the breakpoint", and "line perpendicular confirmation at program startup" are respectively set to "prohibited". In addition, Figure 4 An example is shown where the setting content of the setting item of "mechanical actions during cooler alarm" is set to "warning". When making a general description of the input box, the symbol 92 is used, and when describing each input box, the symbols 92A to 92F are used.

[0056] Figure 5A and Figure 5B A diagram showing an example of the display screen of the display unit. Figure 5A and Figure 5B An example of the display when changing the setting content is shown.

[0057] Figure 5A An example is shown where the input box 92A related to the setting item of "specific resistance alarm" is selected by the user. When the user selects the input box 92A, as Figure 5AAs shown, a selection menu 94A is displayed. The selection menu 94A includes, for example, a warning button 96A, a stop after processing button 96B, an immediate stop button 96C, an initial value button 96D, and a cancel button 96E. When making a general description of the buttons, the symbol 96 is used, and when describing each button, the symbols 96A to 96E are used. The user can change the setting content by appropriately selecting a button 96. As described above, in the setting item of "specific resistance alarm", "stop after processing" is the initial value. Therefore, when the stop after processing button 96B is selected, the initial value button 96D also changes to a displayed state where it is selected. In addition, when the initial value button 96D is selected, the stop after processing button 96B also changes to a selected state. That is, in Figure 5A the example shown, the stop after processing button 96B and the initial value button 96D are linked. Furthermore, Figure 5A and Figure 5B in, the selected button 96 is represented by a thick line.

[0058] Figure 5B An example is shown in which the user has selected the input box 92B related to the setting item of "specific resistance detection electrode alarm". When the user selects the input box 92B, as Figure 5B shown, a selection menu 94B is displayed. The selection menu 94B includes a warning button 96A, a stop after processing button 96B, an initial value button 96D, and a cancel button 96E. As described above, in the setting item of "specific resistance detection electrode alarm", "stop after processing" is the initial value. Therefore, when the stop after processing button 96B is selected, the initial value button 96D also changes to a displayed state where it is selected. In addition, when the initial value button 96D is selected, the stop after processing button 96B also changes to a selected state. That is, in Figure 5B the example shown, the stop after processing button 96B and the initial value button 96D are linked.

[0059] As Figure 2 shown, the storage unit 58 is equipped with a risk level storage unit 80, a time interval storage unit 82, and a change information storage unit 84.

[0060] The risk level storage unit 80 can store risk levels corresponding to the setting contents of various setting items of the control device 18 (refer to Figure 3 ). As described above, the risk level can be comprehensively determined based on the risk of having an adverse impact on the discharge machining machine 10, the risk of having an adverse impact on the machining of the workpiece W, and the like.

[0061] The time interval storage unit 82 can store a caution call display 102 after a setting change described later (refer to Figure 7) The time interval. Furthermore, the time interval can be a time interval not corresponding to the risk level or a time interval corresponding to the risk level. In the case where the time interval is a time interval not corresponding to the risk level, the time interval can be set to the same value at any risk level. On the other hand, in the case where the time interval is a time interval corresponding to the risk level, as the risk level increases, the value of the time interval can be set shorter.

[0062] The change information storage unit 84 can store information indicating the time of the setting change, the setting item for which the setting change has been made, and the content of the setting change. That is, the change information storage unit 84 can store the change history.

[0063] When the user instructs a change in the setting content of a certain setting item among a plurality of preset setting items to a content other than the recommended setting content, the first determination unit 63 makes the following determination. That is, in such a case, the first determination unit 63 determines whether the risk level corresponding to the setting content instructed by the user is above the attention arousal threshold according to the risk level corresponding to the setting content of the setting item. The attention arousal threshold can be set to 7, for example, but is not limited thereto.

[0064] When the first determination unit 63 determines that the risk level corresponding to the setting content instructed by the user is above the attention arousal threshold, the setting change display control unit 74 Figure 6 displays the attention arousal display 98 at the time of setting change as shown on the display screen 72 of the display unit 68. Figure 6 FIG. is an example of the attention arousal display at the time of setting change. The attention arousal display 98 at the time of setting change is the attention arousal display at the time of setting change. As Figure 6 shown, the attention arousal display 98 at the time of setting change can be constituted by a pop-up screen, for example, but is not limited thereto. Figure 6The example of the situation where the statement "It may affect the machine. Do you want to return to the original setting?" is displayed on the pop-up screen is shown. When a setting change is made, the pop-up screen that calls attention, for example, may include a YES button 100A displayed as "Yes" and a NO button 100B displayed as "No". When the user selects the YES button 100A, the setting will be returned to the original setting. That is, when the user selects the YES button 100A, the setting will be returned to the initial value. In such a case, the setting change unit 65 will not change the setting content of this setting item. When the user selects the NO button 100B, the setting content of this setting item will be changed. That is, in such a case, the setting change unit 65 changes the setting content of this setting item according to the user's instruction. Furthermore, the example of the situation where it is displayed as "It may affect the machine" is shown here, but it is not limited to this. When there is a concern that it may not only affect the electric discharge machine 10 itself but also the machining of the workpiece W, for example, it may be displayed as "It may affect the machine and the machining". When there is no concern about affecting the electric discharge machine 10 but there is a concern about affecting the machining of the workpiece W, it may be displayed as "It may affect the machining".

[0065] The second determination unit 64 determines whether the state where the risk level is above the attention call threshold is continuing after calling attention during the setting change.

[0066] When the second determination unit 64 determines that the state where the risk level is above the attention call threshold is continuing, every time a predetermined time interval elapses, the post-setting-change attention call display control unit 76 will Figure 7 display the post-setting-change attention call display 102 as shown on the display screen 72 of the display unit 68. Figure 7 This is a diagram showing an example of the post-setting-change attention call display. The post-setting-change attention call display 102 is the attention call display after the setting change. As described above, such a time interval is stored in the time interval storage unit 82. As Figure 7 shown, the post-setting-change attention call display 102 may be composed of a pop-up screen, for example, but it is not limited to this. Figure 7An example of a situation in which the sentence "'Resistance alarm' has been set to 'Warning'. It may have an impact on the machine. Do you want to return to the original setting?" is displayed on a pop-up screen. The pop-up screen that constitutes the attention-calling display 102 after the setting change may include a YES button 104A displayed as "Yes" and a NO button 104B displayed as "No". In the case where the user selects the YES button 104A, it will return to the original setting. That is, in the case where the user selects the YES button 104A, it will return to the initial value. In such a case, the setting change unit 65 returns the setting content of the setting item to the setting content corresponding to the initial value. In the case where the user selects the NO button 104B, the setting content of the setting item will not be changed. That is, in such a case, the setting change unit 65 maintains the status quo of the setting content of the setting item unchanged. Furthermore, the case in which the attention-calling display 102 after the setting change is constituted by a pop-up screen is explained here as an example, but it is not limited to this.

[0067] The list screen display control unit 78 can display a list screen 106 showing a list of a plurality of setting items on the display screen 72 of the display unit 68 . Figure 8 2 is a diagram showing an example of a list screen. The list screen display control unit 78 can make the display form of the text indicating the current setting content and the display form of the text indicating the setting content other than the current setting content different from each other. Figure 8 In the example shown, the current setting content is indicated by hollow text, and the setting content other than the current setting content is indicated by normal text. Furthermore, the color of the text indicating the current setting content and the color of the text indicating the setting content other than the current setting content may be different from each other. The overview screen display control unit 78 can flash the setting content of the setting items whose risk level has reached or exceeded the attention calling threshold. In this way, the user can easily grasp the setting content of the setting items with high risk levels.

[0068] The list screen display control unit 78 can display a list screen 106A of setting items whose risk levels are equal to or higher than the attention calling threshold value on the display screen 72 of the display unit 68 . Figure 9 This is a diagram showing an example of a list screen. Figure 9 In the list screen 106A, the setting items whose risk level has reached or exceeded the attention calling threshold are displayed. The setting items whose risk level has not reached the attention calling threshold are not displayed in the list screen 106A. Figure 9 In the example shown, Figure 8 As in the example shown, the current setting content is indicated by hollow text, and the setting content other than the current setting content is indicated by normal text. Figure 9In the example shown, only the setting items whose risk levels have reached above the attention arousal threshold are displayed in a list. Furthermore, the setting contents of the setting items whose risk levels have reached above the attention arousal threshold can also be displayed in a flashing manner on the list screen 106A.

[0069] As Figure 2 shown, the control device 18 can communicate with the information management device 88 via the communication unit 86. The information management device 88 manages the information supplied from the plurality of electric discharge machines 10. The information for the attention arousal display 102 after the setting change can be sent to the external device 90 via the communication unit 86 and the information management device 88. In addition, the information for displaying the list screens 106 and 106A can be sent to the external device 90 via the communication unit 86 and the information management device 88. Examples of the external device 90 include a mobile terminal, a personal computer, etc., but are not limited thereto. Examples of the mobile terminal include a smart phone, a tablet terminal, etc., but are not limited thereto.

[0070] Next, use Figure 10 to explain the operation of the electric discharge machine of the present embodiment. Figure 10 is a flowchart showing the operation of the electric discharge machine of the present embodiment. Figure 10 shows the operation related to the attention arousal display.

[0071] In step S1, the first determination unit 63 determines whether the user has instructed a change of the setting content of a certain setting item among the plurality of preset setting items to a content other than the recommended setting content. If the user has instructed a change of the setting content of the setting item to a content other than the recommended setting content (Yes in step S1), the process proceeds to step S2. If the setting content of the setting item is set to the recommended setting content (No in step S1), Figure 10 the process shown is completed.

[0072] In step S2, the first determination unit 63 determines whether the risk level corresponding to the setting content instructed by the user is above the attention arousal threshold based on the risk level corresponding to the setting content of the setting item. Furthermore, as described above, such a risk level is stored in the risk level storage unit 80. If the risk level corresponding to the setting content instructed by the user is above the attention arousal threshold (Yes in step S2), the process proceeds to step S3. If the risk level corresponding to the setting content instructed by the user is less than the attention arousal threshold (No in step S2), Figure 10 the process shown is completed.

[0073] In step S3, the setting change display control unit 74 displays the setting change attention arousal display 98 on the display screen 72 of the display unit 68. Thereafter, the process proceeds to step S4.

[0074] When the attention call display 98 for setting change is displayed on the display screen 72 of the display unit 68 and the user nevertheless instructs the setting change to be made (Yes in step S4), the setting change unit 65 makes the setting change. Thereafter, the process proceeds to step S5. When the user instructs not to make the setting change (No in step S4), the setting change unit 65 does not make the setting change. In this case, Figure 10 the processing shown is completed.

[0075] In step S5, the post-setting-change display control unit 76 displays the post-setting-change attention call display 102 on the display screen 72 of the display unit 68. The post-setting-change display control unit 76 can, for example, display the post-setting-change attention call display 102 on the display screen 72 of the display unit 68 immediately after the user has instructed the setting change to be made. Further, the post-setting-change attention call display 102 may be displayed on the display screen 72 of the display unit 68 after a certain amount of time has elapsed since the user instructed the setting change to be made. Thereafter, the process proceeds to step S6.

[0076] In step S6, the second determination unit 64 determines whether a time corresponding to a pre-determined time interval has elapsed. When a time corresponding to the pre-determined time interval has elapsed (Yes in step S6), the process proceeds to step S7. When a time corresponding to the pre-determined time interval has not elapsed (No in step S6), step S6 is repeated.

[0077] In step S7, the second determination unit 64 determines whether the risk level corresponding to the current setting content of the setting item is equal to or higher than the attention call threshold. When the risk level corresponding to the current setting content of the setting item is equal to or higher than the attention call threshold (Yes in step S7), the process proceeds to step S5. When the risk level corresponding to the current setting content of the setting item is less than the attention call threshold (No in step S7), Figure 10 the processing shown is completed.

[0078] Thus, according to the present embodiment, when the risk level corresponding to the setting content instructed by the user is equal to or higher than the attention call threshold, the attention call display 98 at the time of setting change is displayed on the display screen 72 of the display unit 68. Accordingly, the user can be called to attention to the fact that a high risk is generated due to the setting change. Further, according to the present embodiment, when the risk level remains equal to or higher than the attention call threshold even after the attention call display at the time of setting change, the post-setting-change attention call display 102 is displayed on the display screen 72 of the display unit 68 every time a pre-determined time interval elapses. Therefore, according to the present embodiment, it is possible to suppress the continued use of the electric discharge machine 10 in a high-risk state.

[0079] (Modification example)

[0080] Use Figure 11 to explain the electric discharge machine of the modification example of the present embodiment. Figure 11 It is a block diagram showing a part of the electric discharge machine of the present modification example.

[0081] The electric discharge machine 10 of the present modification example is further equipped with a time interval determination unit 108 that determines a time interval according to the risk level. When the risk level is relatively high, the time interval determination unit 108 sets the time interval relatively short. On the other hand, when the risk level is relatively low, the time interval determination unit 108 sets the time interval relatively long. Whenever the time interval determined by the time interval determination unit 108 elapses, the setting change post-display control unit 76 displays the setting change post-attention arousal display 102 on the display screen 72 of the display unit 68.

[0082] In this way, the time interval determination unit 108 can determine a time interval corresponding to the risk level.

[0083] [Modified embodiment]

[0084] The preferred embodiments related to the present invention have been described above, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention.

[0085] For example, in the above embodiment, the case of changing the setting content of the setting item related to "mechanical action at the time of alarm" is taken as an example for explanation, but it is not limited thereto. That is, in the above embodiment, the case of changing the setting content of the setting item related to the alarm is taken as an example for explanation, but it is not limited thereto. For example, the present invention can also be applied when changing the setting content of the setting item related to the machining fluid. That is, an attention arousal display can also be performed when the user performs an operation of excessively increasing or decreasing the specific resistance of the machining fluid. In addition, the present invention can also be applied when changing the setting content of the setting item related to the program, the setting content of the setting item related to program editing, the setting content of the setting item related to AI control, the setting content of the setting item related to taper, etc. In addition, the present invention can also be applied when changing the setting content of the setting item related to user assistance, the setting content of the setting item related to the wire cutter, the setting content of the setting item related to automatic wiring, the setting content of the setting item related to position finding setting, etc. In addition, the present invention can also be applied when changing the setting content of the setting item related to vertical adjustment, the setting content of the setting item related to tapered guide measurement, the setting content of the setting item related to the filter, etc.

[0086] In addition, in the above-described embodiment, the case where the attention call display 98 at the time of setting change is displayed on the display screen 72 of the display unit 68 before the setting content is changed by the setting change unit 65 has been described as an example, but it is not limited thereto. For example, the attention call display 98 at the time of setting change may also be displayed on the display screen 72 of the display unit 68 after the setting content is changed by the setting change unit 65 according to a user's instruction.

[0087] In addition, in the above-described embodiment, the case where the electric discharge machine 10 is a wire electric discharge machine has been described as an example, but it is not limited thereto. The electric discharge machine 10 may also be a die sinking electric discharge machine or the like. A die sinking electric discharge machine is a machine tool that applies a voltage between an electrode (tool electrode) processed into a shape to be transferred and a workpiece W in a machining liquid so that a discharge occurs between the poles formed by the tool electrode and the workpiece W, thereby transferring the shape of the tool electrode to the workpiece W.

[0088] The above-described embodiment is summarized as follows.

[0089] The electric discharge machine (10) is an electric discharge machine having a control device (18). The control device (18) performs electric discharge machining on a workpiece (W) by causing an electric discharge to occur between the poles formed by the workpiece (W) and the electrode (12). This electric discharge machine includes: a risk level storage unit (80) that stores a risk level corresponding to the setting content of various setting items of the control device; a first determination unit (63) that, when the user instructs a change in the setting content of a certain setting item among a plurality of preset setting items to a content other than the recommended setting content, the first determination unit (63) determines whether the risk level corresponding to the setting content instructed by the user is above the attention arousal threshold based on the risk level stored in the risk level storage unit; a display control unit (74) at the time of setting change that, when the first determination unit determines that the risk level corresponding to the setting content instructed by the user is above the attention arousal threshold, the display control unit (74) at the time of setting change displays an attention arousal display at the time of setting change, i.e., an attention arousal display (98) at the time of setting change, on the display unit (68); a second determination unit (64) that determines whether the state where the risk level is above the attention arousal threshold continues after the display of the attention arousal display at the time of setting change; and a display control unit (76) after setting change that, when the second determination unit determines that the state where the risk level is above the attention arousal threshold continues, the display control unit (76) after setting change displays an attention arousal display after setting change, i.e., an attention arousal display (102) after setting change, on the display unit every time a predetermined time interval elapses. According to such a configuration, when the risk level corresponding to the setting content after the setting change is above the attention arousal threshold, the attention arousal display at the time of setting change is displayed on the display unit. Therefore, it is possible to draw the user's attention to the fact that a high risk is generated due to the change in the setting content of this setting item. And, according to such a configuration, when the risk level also continues to be above the attention arousal threshold after the attention arousal display at the time of setting change, the attention arousal display after setting change is displayed on the display unit every time a predetermined time interval elapses. Thus, according to such a configuration, it is possible to suppress the situation of continuing to use the electric discharge machine in a high-risk state.

[0090] It may also include a setting change unit (65). When the user performs an operation to change the setting content of the setting item, the setting change unit (65) changes the setting content of the setting item, and the display control unit at the time of setting change displays the attention arousal display at the time of setting change on the display unit before the setting content is changed by the setting change unit. According to such a configuration, it is possible to draw the user's attention to the fact that a high risk is generated due to the change in the setting content of this setting item before the setting content is changed by the setting change unit.

[0091] It may also include a time interval storage unit (82) that stores the time interval corresponding to the risk level. Whenever the time interval corresponding to the risk level elapses, the post - setting - change display control unit displays the post - setting - change attention - arousal display on the display unit. With such a configuration, the post - setting - change attention - arousal display can be displayed at an appropriate time interval corresponding to the risk level.

[0092] It may also have a time interval determination unit (108) that determines the time interval according to the risk level. Whenever the time interval determined by the time interval determination unit according to the risk level elapses, the post - setting - change display control unit displays the post - setting - change attention - arousal display on the display unit. With such a configuration, the post - setting - change attention - arousal display can be displayed at an appropriate time interval corresponding to the risk level.

[0093] It may also include a list - screen display control unit (78) that displays a list screen (106, 106A) of a plurality of the setting items. With such a configuration, the user can confirm the list of the setting items.

[0094] The list - screen display control unit may display the list screen of the setting items for which the risk level has reached above the attention - arousal threshold. With such a configuration, the user can confirm the list of the setting items for which the risk level has reached above the attention - arousal threshold.

[0095] The list - screen display control unit may cause the setting content of the setting items for which the risk level has reached above the attention - arousal threshold to blink - display. With such a configuration, the user can easily grasp the setting content with a high risk level.

[0096] It may also include a change - information storage unit (84) that stores information indicating the time of the setting change, the setting item for which the setting change has been made, and the content of the setting change. With such a configuration, the change history can be confirmed.

[0097] It may further include a communication unit (86) that communicates with an information management device (88). The post - setting - change display control unit supplies information for displaying the post - setting - change attention - arousal display on an external device (90) to the external device via the communication unit and the information management device. With such a configuration, the external device can display the post - setting - change attention - arousal display.

[0098] It may also be provided with a communication unit for communicating with the information management device, and the list screen display control unit supplies information for displaying the list screen on an external device to the external device via the communication unit and the information management device. With such a configuration, the list screen can be displayed on the external device.

[0099] The external device may be a mobile terminal or a personal computer.

[0100] The plurality of preset setting items may include: setting items related to actions when a specific resistance alarm is issued when the specific resistance of the processing liquid goes out of the recommended range; setting items related to actions when a specific resistance detection electrode alarm is issued when the maintenance period of the electrode for detecting the specific resistance of the processing liquid, i.e., the specific resistance detection electrode, expires; setting items related to actions when the start key is pressed while the pointer is in a position other than the start of the program; setting items related to the resume of discharge machining when the start key is pressed in a state where a machining resume position is formed at a position other than the machining interruption position; setting items related to the confirmation of whether the electrode is in a vertical position pre-registered as the initial position; and at least any one of setting items related to actions when a cooler alarm is issued when a malfunction occurs in the cooler for cooling the processing liquid.

Claims

1. A discharge machining apparatus (10) having a control device (18) that performs discharge machining on a workpiece (W) by causing a discharge to occur between the workpiece and an electrode (12), the discharge machining apparatus (10) being characterized by comprising: a risk level storage unit (80) that stores a risk level corresponding to the setting content of various setting items of the control device; a first determination unit (63) that, when the user instructs a change in the setting content of a certain setting item among a plurality of preset setting items to a content other than the recommended setting content, determines whether the risk level corresponding to the setting content instructed by the user is equal to or higher than an attention arousal threshold based on the risk level stored in the risk level storage unit; a display control unit (74) for display at the time of setting change that, when the first determination unit determines that the risk level corresponding to the setting content instructed by the user is equal to or higher than the attention arousal threshold, displays an attention arousal display at the time of setting change, that is, an attention arousal display (98) at the time of setting change, on a display unit (68); a second determination unit (64) that determines whether the state in which the risk level is equal to or higher than the attention arousal threshold continues after the display of the attention arousal display at the time of setting change; and a display control unit (76) for display after setting change that, when the second determination unit determines that the state in which the risk level is equal to or higher than the attention arousal threshold continues, displays an attention arousal display after setting change, that is, an attention arousal display (102) after setting change, on the display unit at every predetermined time interval.

2. The discharge machining apparatus according to claim 1, characterized in that it further comprises a setting change unit (65) that changes the setting content of the setting item when the user performs an operation to change the setting content of the setting item, and the display control unit for display at the time of setting change displays the attention arousal display at the time of setting change on the display unit before the setting content is changed by the setting change unit.

3. The discharge machining apparatus according to claim 1 or 2, characterized in that it further comprises a time interval storage unit (82) that stores the time interval corresponding to the risk level, and the display control unit for display after setting change displays the attention arousal display after setting change on the display unit at every time interval corresponding to the risk level.

4. The discharge machining apparatus according to claim 1 or 2, characterized in that it further has a time interval determination unit (108) that determines the time interval based on the risk level, and the display control unit for display after setting change displays the attention arousal display after setting change on the display unit at every time interval determined by the time interval determination unit based on the risk level.

5. The electric discharge machine according to claim 1 or 2, characterized in that it further includes a list screen display control unit (78) that displays a list screen of a plurality of the setting items.

6. The electric discharge machine according to claim 5, characterized in that the list screen display control unit displays the list screen of the setting items for which the risk level has reached above the attention arousal threshold.

7. The electric discharge machine according to claim 5, characterized in that the list screen display control unit causes the setting contents of the setting items for which the risk level has reached above the attention arousal threshold to blink and display.

8. The electric discharge machine according to claim 1 or 2, characterized in that it further includes a change information storage unit (84), and the change information storage unit (84) stores information indicating the time of the setting change, the setting item for which the setting change has been made, and the content of the setting change.

9. The electric discharge machine according to claim 1 or 2, characterized in that it further includes a communication unit (86) that communicates with an information management device (88), and the post-setting change display control unit supplies, via the communication unit and the information management device, information for displaying post-setting change attention arousal display on an external device (90) to the external device.

10. The electric discharge machine according to claim 5, characterized in that it further includes a communication unit that communicates with an information management device, and the list screen display control unit supplies, via the communication unit and the information management device, information for displaying the list screen on an external device to the external device.

11. The electric discharge machine according to claim 9, characterized in that the external device is a mobile terminal or a personal computer.

12. The electric discharge machine according to claim 1 or 2, characterized in that the plurality of preset setting items include at least any one of: setting items related to actions when a specific resistance alarm is issued, which is an alarm issued when the specific resistance of the processing liquid is no longer within the recommended range; setting items related to actions when a specific resistance detection electrode alarm is issued, which is an alarm issued when the maintenance period of an electrode for detecting the specific resistance of the processing liquid, i.e., the specific resistance detection electrode, has expired; setting items related to actions when the start key is pressed while the pointer is in a position other than the start of the program; setting items related to the recovery of electric discharge machining in the case where the start key is pressed when the machining recovery position is in a position other than the machining interruption position; setting items related to the confirmation of whether the electrode is in a vertical position pre-registered as the initial position; and setting items related to actions when a cooler alarm is issued, which is an alarm issued when a malfunction occurs in a cooler for cooling the processing liquid.

Images