WO2022097596A9 - ワイヤ放電加工機、及び、ワイヤ放電加工機の制御方法 - Google Patents
ワイヤ放電加工機、及び、ワイヤ放電加工機の制御方法 Download PDFInfo
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- WO2022097596A9 WO2022097596A9 PCT/JP2021/040190 JP2021040190W WO2022097596A9 WO 2022097596 A9 WO2022097596 A9 WO 2022097596A9 JP 2021040190 W JP2021040190 W JP 2021040190W WO 2022097596 A9 WO2022097596 A9 WO 2022097596A9
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- electric discharge
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- 238000000034 method Methods 0.000 title claims description 105
- 238000009763 wire-cut EDM Methods 0.000 title abstract 3
- 238000003754 machining Methods 0.000 claims abstract description 211
- 238000012545 processing Methods 0.000 claims description 46
- 238000001514 detection method Methods 0.000 claims description 7
- 238000013459 approach Methods 0.000 abstract description 48
- 230000006698 induction Effects 0.000 description 44
- 238000010586 diagram Methods 0.000 description 8
- 230000001939 inductive effect Effects 0.000 description 6
- 238000009760 electrical discharge machining Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
- B23H7/04—Apparatus for supplying current to working gap; Electric circuits specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/14—Electric circuits specially adapted therefor, e.g. power supply
- B23H7/20—Electric circuits specially adapted therefor, e.g. power supply for programme-control, e.g. adaptive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
- B23H1/022—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges for shaping the discharge pulse train
Definitions
- the present invention relates to a wire electric discharge machine and a control method for the wire electric discharge machine.
- Japanese Unexamined Patent Application Publication No. 2001-113419 discloses that when a wire electric discharge machine is machining a portion where the wire electrode is likely to break, the variation in the time interval between electric discharges increases.
- the portion where the wire electrode is likely to break includes portions such as bent portions, stepped portions, and end face portions of the workpiece. Therefore, in the wire electric discharge machine disclosed in Japanese Unexamined Patent Application Publication No. 2001-113419, when the dispersion value indicating the dispersion of the time interval at which electric discharge occurs is larger than the set value, the machining conditions are adjusted so as to suppress disconnection of the wire electrode. change.
- the technique disclosed in Japanese Patent Application Laid-Open No. 2001-113419 changes the machining conditions so as to suppress disconnection of the wire electrode even when the wire electrode is separated from the machining end surface.
- disconnection of the wire electrode is less likely to occur. Therefore, the technique disclosed in Japanese Patent Application Laid-Open No. 2001-113419 cannot appropriately set the processing conditions.
- the present invention has been made to solve the above-described problems, and provides a wire electric discharge machine and a wire electric discharge machine that can more appropriately set machining conditions when a wire electrode is approaching a machining end face of a workpiece.
- An object of the present invention is to provide a control method for an electric discharge machine.
- a wire electrode is relatively moved with respect to a workpiece, and a voltage is applied between electrodes of the wire electrode and the workpiece to generate electric discharge, whereby the workpiece is
- a wire electric discharge machine for performing electric discharge machining of a workpiece comprising: a controller for controlling the relative speed of the wire electrode with respect to the workpiece and the electric discharge energy generated between the electrodes according to machining conditions; a voltage detection unit for detecting a voltage between the electrodes; and a voltage between the electrodes detected when the wire electrode is approaching a machining end surface of the workpiece in order to machine the workpiece.
- a discharge determination unit that determines whether or not a discharge has occurred between the electrodes within the unit time, a count unit that counts the number of times it is determined that a discharge has occurred, and the The machining condition when approaching the machining end face is set to a first condition, and when the counted number of times reaches a predetermined number of times, the machining condition is changed to a second condition different from the first condition. and a processing condition setting unit for setting conditions.
- a wire electrode is moved relative to a workpiece, and a voltage is applied between electrodes of the wire electrode and the workpiece to generate electric discharge.
- a control method for a wire electric discharge machine that performs electric discharge machining of a workpiece wherein the wire electric discharge machine includes a voltage detection unit that detects the voltage between the electrodes, and the wire electric discharge machine for machining the workpiece.
- a first control step of controlling the relative speed of the wire electrode and the electric discharge energy generated between the electrodes; and the voltage between the electrodes detected when the wire electrode is approaching the machining end face.
- a discharge determination step of determining whether or not a discharge has occurred between the electrodes within the unit time a counting step of counting the number of times it is determined that a discharge has occurred, and the a second machining condition setting step of setting the machining condition to a second condition different from the first condition when the counted number of times reaches a predetermined number; and a second control step of controlling the relative velocity of the wire electrode with respect to the workpiece and the electrical discharge energy generated between the electrodes.
- the machining conditions of the wire electric discharge machine can be set more appropriately.
- FIG. 1 is a configuration diagram of a wire electric discharge machine.
- FIG. 2 is a flow chart showing the flow of approach processing performed in the control device.
- FIG. 3 is a schematic diagram showing how the wire electrode approaches the end face of the workpiece to be machined until the machining of the workpiece is started.
- FIG. 4 is a schematic diagram showing a work in which the core is left uncut.
- FIG. 5 is a schematic diagram showing how the wire electrode approaches the machining end surface of the workpiece and starts machining the workpiece.
- FIG. 6 is a flow chart showing the flow of approach processing performed in the control device.
- FIG. 7 is a flow chart showing the flow of approach processing performed in the control device.
- FIG. 1 is a configuration diagram of a wire electric discharge machine 10. As shown in FIG. The wire electric discharge machine 10 performs machining by generating electric discharge between the wire electrode 12 and the workpiece 14 while moving the wire electrode 12 relative to the workpiece (workpiece) 14 .
- the work 14 is placed on a work table (not shown).
- the wire electrode 12 moves relative to the work 14 by moving the work table in the X-axis direction and the Y-axis direction with the servo motor 16 .
- the wire electric discharge machine 10 has a voltage detector 18, an electric discharge induction circuit 20, a main electric discharge circuit 22, a servo amplifier 24, and a control device 26 in addition to the servomotor 16.
- the voltage detection unit 18 detects the inter-electrode voltage (hereinafter also referred to as the inter-electrode voltage).
- the discharge induction circuit 20 applies a discharge induction voltage between the electrodes to generate a discharge between the electrodes.
- the main discharge circuit 22 supplies a machining current to the wire electrode 12 as discharge energy for machining the workpiece 14 after the discharge is generated between the electrodes.
- the servo amplifier 24 supplies drive power to the servo motor 16 to drive the servo motor 16 .
- the control device 26 has an electric discharge determination section 28 , a counting section 30 , a machining condition setting section 32 , an electric discharge induced voltage control section 34 , a machining current control section 36 and a servo controller 38 .
- the discharge determination unit 28 determines whether or not a discharge has occurred between the electrodes within a unit time. A determination as to whether or not a discharge has occurred between the electrodes is made based on the voltage between the electrodes. This determination is repeated every unit time. The counting unit 30 counts the number of times the discharge determination unit 28 determines that a discharge has occurred between the electrodes.
- the machining condition setting unit 32 sets machining conditions according to the number of times counted by the counting unit 30 . Machining conditions include the machining current supplied from the main discharge circuit 22 to the wire electrode 12, the relative speed of the wire electrode 12 with respect to the workpiece 14, the discharge induced voltage applied between the electrodes by the discharge induction circuit 20, and the discharge induced voltage. conditions for each of the cycles.
- the magnitude of the machining current supplied from the main discharge circuit 22 to the wire electrode 12 correlates with the magnitude of the discharge energy generated between the electrodes. Therefore, setting the machining current supplied from the main discharge circuit 22 to the wire electrode 12 can be said to be setting the discharge energy generated between the electrodes.
- the wire electrode 12 moves relative to the work 14 by moving the work 14 placed on the work table together with the work table. Therefore, the relative speed of the wire electrode 12 with respect to the work 14 can also be said to be the moving speed of the work table.
- the discharge induction voltage control unit 34 outputs a command value based on the machining conditions set in the machining condition setting unit 32 to the discharge induction circuit 20 .
- the discharge induction circuit 20 applies a discharge induction voltage between the electrodes based on the command value. As a result, the discharge induced voltage set by the machining condition setting unit 32 is applied between the electrodes at the cycle set by the machining condition setting unit 32 .
- the machining current control unit 36 outputs a command value based on the machining conditions set by the machining condition setting unit 32 to the main electric discharge circuit 22 .
- the main discharge circuit 22 supplies a machining current between the electrodes based on the command value.
- the machining current set by the machining condition setting unit 32 is supplied between the electrodes.
- the machining current control section 36 corresponds to the control section of the present invention.
- the servo controller 38 outputs command values based on the machining conditions set in the machining condition setting unit 32 to the servo amplifier 24 .
- the servo amplifier 24 supplies drive power to the servo motor 16 based on the command value.
- the servo controller 38 corresponds to the control section of the present invention.
- the control device 26 has a computer with an arithmetic processing unit and a storage (not shown).
- the arithmetic processing unit has, for example, a central processing unit (CPU), a processor such as a microprocessing unit (MPU), and a memory such as a ROM and a RAM.
- the storage is, for example, a hard disk, solid state drive (SSD), or the like.
- the discharge determining unit 28, the counting unit 30, the machining condition setting unit 32, the discharge induced voltage control unit 34, the machining current control unit 36, and the servo controller 38 are controlled by the arithmetic processing unit executing a program stored in the storage. Realized.
- FIG. 2 is a flow chart showing the flow of approach processing performed in the control device 26. As shown in FIG. The approach process is executed each time the wire electrode 12 approaches the machining end surface 40 (see FIGS. 3 and 5) of the workpiece 14 . The processing end surface 40 indicates the surface of the work 14 that the wire electrode 12 approaches when starting processing of the work 14 .
- step S1 the processing condition setting unit 32 sets the processing condition to the first condition. After that, the process proceeds to step S2.
- the first condition is the discharge induced voltage applied between the electrodes, the period of applying the discharge induced voltage, the machining current supplied to the wire electrode 12, and the relative speed of the wire electrode 12 with respect to the workpiece 14. It is a condition.
- step S ⁇ b>2 the discharge induction voltage control section 34 outputs a command value based on the first condition to the discharge induction circuit 20 .
- the discharge induction circuit 20 applies the discharge induction voltage of the first condition between the electrodes in the cycle of the first condition.
- the machining current control unit 36 outputs a command value based on the first condition to the main discharge circuit 22 .
- the main discharge circuit 22 supplies the machining current of the first condition to the wire electrode 12 .
- the servo controller 38 outputs a command value based on the first condition to the servo amplifier 24 .
- the servo amplifier 24 supplies drive power to the servo motor 16 based on the command value.
- step S3 the discharge determination unit 28 determines whether or not the unit time has passed. If the unit time has passed, the process proceeds to step S4, and if the unit time has not passed, the process of step S3 is repeated. The determination as to whether or not the unit time has passed is made based on the elapsed time, whichever is later of the starting time of the approach process and the time when it was previously determined that the unit time has passed in step S3.
- step S4 the discharge determination unit 28 determines whether or not a discharge has occurred between the electrodes within a unit time. If discharge occurs, the process proceeds to step S5, and if no discharge occurs, the process returns to step S3. A determination as to whether or not a discharge has occurred between the electrodes within a unit time is made, for example, based on the average value of the voltage between the electrodes within the unit time. When the average value of the inter-electrode voltage within the unit time is equal to or lower than the predetermined voltage, it is determined that the discharge has occurred between the electrodes within the unit time.
- step S5 the counting unit 30 increments the number of times it is determined that discharge has occurred between the electrodes within a unit time (hereinafter referred to as the number of determinations). After that, the process proceeds to step S6.
- the number of determinations is counted as one regardless of whether the number of discharges occurring between the electrodes within a unit time is one or multiple times.
- step S6 the processing condition setting unit 32 determines whether or not the number of times of determination is equal to or greater than a predetermined number of times. If the number of determinations is equal to or greater than the predetermined number of times, the process proceeds to step S7, and if the number of determinations is less than the predetermined number of times, the process returns to step S3.
- step S7 the processing condition setting unit 32 sets the processing condition to the second condition.
- the second condition is the discharge induced voltage applied between the electrodes, the period of applying the discharge induced voltage, the machining current supplied to the wire electrode 12, and the relative speed of the wire electrode 12 to the workpiece 14. It is a condition.
- the second condition is set to a speed slower than the first condition.
- the second condition may be the same as the first condition, or the second condition may be different from the first condition.
- the second condition may be the same as the first condition, or the second condition may be different from the first condition for the discharge induced voltage applied between the electrodes.
- the second condition may be the same as the first condition, or the second condition may be different from the first condition with respect to the period of applying the discharge inducing voltage.
- step S ⁇ b>8 the discharge induction voltage control section 34 outputs the command value based on the second condition to the discharge induction circuit 20 .
- the discharge induction circuit 20 applies the discharge induction voltage of the second condition between the electrodes at the period of the second condition.
- the machining current control unit 36 outputs a command value based on the second condition to the main discharge circuit 22 .
- the main discharge circuit 22 supplies the wire electrode 12 with the machining current of the second condition.
- the servo controller 38 outputs a command value based on the second condition to the servo amplifier 24 .
- the servo amplifier 24 supplies drive power to the servo motor 16 based on the command value.
- the wire electrode 12 moves with respect to the workpiece 14 at the relative speed of the second condition.
- the process moves to step S9.
- the process of step S8 is continuously executed until the process of step S11, which will be described later, is performed.
- step S9 the machining condition setting unit 32 determines whether or not the moving distance of the wire electrode 12 with respect to the work 14 is equal to or greater than a predetermined distance.
- the movement distance of the wire electrode 12 is measured with the position of the wire electrode 12 at the time when the machining condition is switched from the first condition to the second condition in step S7 as a base point. If the moving distance of the wire electrode 12 is greater than or equal to the predetermined distance, the process proceeds to step S10, and if the moving distance of the wire electrode 12 is less than the predetermined distance, the process of step S9 is repeated.
- the processing condition setting unit 32 sets the processing condition to the third condition. After that, the process moves to step S11.
- the third condition is the discharge induced voltage applied between the electrodes, the period of applying the discharge induced voltage, the machining current supplied to the wire electrode 12, and the relative speed of the wire electrode 12 to the workpiece 14. It is a condition.
- the relative speed of the wire electrode 12 with respect to the workpiece 14 is set higher under the third condition than under the second condition. Furthermore, the machining current supplied to the wire electrode 12 is set to a higher current under the third condition than under the second condition.
- the third condition may be the same as the second condition, or the third condition may be different from the second condition.
- the period of applying the discharge inducing voltage the third condition may be the same as the second condition, or the third condition may be different from the second condition.
- the machining current supplied to the wire electrode 12 is set to the second condition.
- the current may be set to the same magnitude as the condition of .
- the machining current supplied to the wire electrode 12 if the third condition is set to a current greater than the second condition, the relative speed of the wire electrode 12 with respect to the workpiece 14 is set to the second condition. may be set to the same speed as the condition of
- step S ⁇ b>11 the discharge induction voltage control section 34 outputs a command value based on the third condition to the discharge induction circuit 20 .
- the discharge induction circuit 20 applies the discharge induction voltage of the third condition between the electrodes at the period of the third condition.
- the machining current control unit 36 outputs a command value based on the third condition to the main discharge circuit 22 .
- the main discharge circuit 22 supplies the wire electrode 12 with the machining current of the third condition.
- the servo controller 38 outputs a command value based on the third condition to the servo amplifier 24 .
- the servo amplifier 24 supplies drive power to the servo motor 16 based on the command value.
- step S11 is continuously executed until the machining conditions are changed even after the approach process is finished.
- FIG. 3 is a schematic diagram showing how the wire electrode 12 approaches the machined end surface 40 of the work 14 and enters the work 14 from the machined end surface 40 while performing electric discharge machining.
- the machining condition setting unit 32 sets the machining conditions to the first conditions.
- the machining condition is set to the first condition, the relative speed of the wire electrode 12 increases.
- the time required for the wire electrode 12 to reach the processing end surface 40 can be shortened.
- the time from when the wire electrode 12 starts approaching the machining end surface 40 to when the machining of the workpiece 14 is completed (hereinafter sometimes referred to as machining time) can be shortened.
- the wire electric discharge machine 10 switches the machining condition from the first condition to the second condition.
- the relative speed of the wire electrode 12 when the machining condition is set to the second condition is slower than the relative speed of the wire electrode 12 when the machining condition is set to the first condition.
- the machining condition In order to reduce the machining time and prevent the wire electrode 12 from breaking, it is necessary to switch the machining condition from the first condition to the second condition when the wire electrode 12 approaches the machining end surface 40 . be. If the machining condition is switched from the first condition to the second condition when the wire electrode 12 is separated from the machining end surface 40, the machining time cannot be sufficiently shortened. Further, if the machining condition is switched from the first condition to the second condition after the wire electrode 12 enters the work 14, disconnection of the wire electrode 12 frequently occurs when the wire electrode 12 enters the work 14. .
- FIG. 4 is a schematic diagram showing the workpiece 14 with the punch (core) 42 left uncut.
- the workpiece 14 is left uncut, and the punch 42 and the die 46 are connected at the uncut portion 44 indicated by the dotted line in FIG.
- FIG. 5 is a schematic diagram showing how the wire electrode 12 approaches the machining end surface 40 of the workpiece 14 and enters the workpiece 14 from the machining end surface 40 while performing electric discharge machining.
- the wire electrode 12 In order to separate the punch 42 from the die 46, the wire electrode 12 needs to approach the machined end surface 40 through the machined groove 48 that has already been machined, as shown in FIG. In this case, since the workpieces 14 on both sides of the machined groove 48 are close to the wire electrode 12, electrical discharge may occur between the electrodes. In such a case, it is likely to be erroneously determined that the wire electrode 12 has approached the machining end surface 40 even though the wire electrode 12 is away from the machining end surface 40 . If an erroneous determination is made, the machining condition is switched from the first condition to the second condition at the position where the wire electrode 12 is separated from the machining end surface 40 .
- the machining condition is the second condition
- the relative speed of the wire electrode 12 with respect to the workpiece 14 is slower than when the machining condition is the first condition. Therefore, it takes longer for the wire electrode 12 to reach the end surface 40 to be machined, which may increase the machining time.
- the wire electric discharge machine 10 of the present embodiment determines, for each unit time, whether or not an electric discharge has occurred between the electrodes within the unit time. Regardless of whether the number of times the discharge occurred between the electrodes within the unit time is one or multiple times, the number of times it is determined that the discharge has occurred between the electrodes within the unit time (the number of determinations) is counted as one. do. If the discharge occurs only once, the number of determinations is small. On the other hand, when discharge occurs continuously, the number of determinations increases.
- the machining condition setting unit 32 determines that an electric discharge has occurred between electrodes within a unit time as a criterion for switching the machining condition from the first condition to the second condition.
- the number of times (the number of judgments) is used.
- the timing for switching the machining condition from the first condition to the second condition can be the time when the wire electrode 12 approaches the machining end surface 40 .
- the wire electrode 12 can be moved relative to the work 14 until the wire electrode 12 approaches the machining end face 40 under the first condition, in which the relative speed of the wire electrode 12 with respect to the work 14 is higher than that under the second condition. can be done. Therefore, the time required for the wire electrode 12 to reach the processed end surface 40 can be shortened, and the processing time can also be shortened.
- the start of electric discharge machining refers to the point in time when the surface of the machined end face 40 is removed by the electric discharge generated between the wire electrode 12 and the machined end face 40 .
- the load on the wire electrode 12 is greater than before the start of electric discharge machining, and the wire electrode 12 is likely to break.
- the wire electric discharge machine 10 of this embodiment sets the relative speed of the wire electrode 12 with respect to the workpiece 14 to the second condition.
- the relative speed of the wire electrode 12 with respect to the workpiece 14 becomes lower than when the relative speed is set to the first condition.
- disconnection of the wire electrode 12 when the wire electrode 12 enters the workpiece 14 from the machined end face 40 from the start of electric discharge machining to immediately after the start of electric discharge machining can be suppressed.
- the machining condition is switched from the first condition to the second condition in the machining condition setting unit 32, when the moving distance of the wire electrode 12 with respect to the workpiece 14 reaches a predetermined distance, the machining condition is switched from the second condition to the third condition.
- the wire electric discharge machine 10 of this embodiment sets the machining current supplied to the wire electrode 12 to the third condition.
- the machining current By setting the machining current to the third condition, the discharge energy between the electrodes becomes higher than when the machining current is set to the second condition.
- the wire electric discharge machine 10 of this embodiment sets the relative speed of the wire electrode 12 with respect to the workpiece 14 to the third condition.
- the relative speed of the wire electrode 12 with respect to the workpiece 14 becomes faster than when the relative speed is set to the second condition. As a result, the machining speed of the workpiece 14 can be increased and the machining time of the workpiece 14 can be shortened.
- FIG. 6 is a flowchart showing the flow of approach processing performed by the control device 26.
- the approach process is executed each time the wire electrode 12 approaches the machining end surface 40 of the workpiece 14 .
- step S21 the processing condition setting unit 32 sets the processing condition to the first condition. After that, the process proceeds to step S22.
- the first condition is the discharge induced voltage applied between the electrodes, the period of applying the discharge induced voltage, the machining current supplied to the wire electrode 12, and the relative speed of the wire electrode 12 with respect to the workpiece 14. It is a condition.
- step S ⁇ b>22 the discharge induction voltage control unit 34 outputs a command value based on the first condition to the discharge induction circuit 20 .
- the discharge induction circuit 20 applies the discharge induction voltage of the first condition between the electrodes in the cycle of the first condition.
- the machining current control unit 36 outputs a command value based on the first condition to the main discharge circuit 22 .
- the main discharge circuit 22 supplies the machining current of the first condition to the wire electrode 12 .
- the servo controller 38 outputs a command value based on the first condition to the servo amplifier 24 .
- the servo amplifier 24 supplies drive power to the servo motor 16 based on the command value.
- the wire electrode 12 moves with respect to the workpiece 14 at the relative speed of the first condition.
- step S23 The process of step S22 is continuously executed until the process of step S29, which will be described later, is performed.
- step S23 the discharge determination unit 28 determines whether or not the unit time has passed. If the unit time has elapsed, the process proceeds to step S24, and if the unit time has not elapsed, the process of step S23 is repeated. The determination as to whether or not the unit time has passed is made based on the elapsed time, whichever is later of the starting time of the approach process and the time at which it was previously determined that the unit time has passed in step S23.
- step S24 the discharge determination unit 28 determines whether or not a discharge has occurred between the electrodes within the unit time. If discharge occurs, the process proceeds to step S25, and if no discharge occurs, the process proceeds to step S26. Whether or not the discharge has occurred between the electrodes within the unit time can be determined based on, for example, the average value of the voltage between the electrodes within the unit time. When the average value of the inter-electrode voltage within the unit time is equal to or lower than the predetermined voltage, it is determined that the discharge has occurred between the electrodes within the unit time.
- step S25 the counting unit 30 increments the number of times it is determined that the discharge has occurred between the electrodes within the unit time (hereinafter referred to as the number of times of determination). After that, the process proceeds to step S27.
- the number of determinations is counted as one regardless of whether the number of discharges occurring between the electrodes within a unit time is one or multiple times.
- step S26 the counting unit 30 resets the number of determinations. After that, the process returns to step S23.
- step S27 the processing condition setting unit 32 determines whether or not the number of times of determination is equal to or greater than a predetermined number of times. If the number of determinations is equal to or greater than the predetermined number of times, the process proceeds to step S28, and if the number of determinations is less than the predetermined number of times, the process returns to step S23.
- step S28 the processing condition setting unit 32 sets the processing condition to the second condition.
- the second condition is the discharge induced voltage applied between the electrodes, the period of applying the discharge induced voltage, the machining current supplied to the wire electrode 12, and the relative speed of the wire electrode 12 to the workpiece 14. It is a condition.
- the second condition is set to a speed slower than the first condition.
- the second condition may be the same as the first condition, or the second condition may be different from the first condition.
- the second condition may be the same as the first condition, or the second condition may be different from the first condition for the discharge induced voltage applied between the electrodes.
- the second condition may be the same as the first condition, or the second condition may be different from the first condition with respect to the period of applying the discharge inducing voltage.
- step S ⁇ b>29 the discharge induction voltage control unit 34 outputs a command value based on the second condition to the discharge induction circuit 20 .
- the discharge induction circuit 20 applies the discharge induction voltage of the second condition between the electrodes at the period of the second condition.
- the machining current control unit 36 outputs a command value based on the second condition to the main discharge circuit 22 .
- the main discharge circuit 22 supplies the wire electrode 12 with the machining current of the second condition.
- the servo controller 38 outputs a command value based on the second condition to the servo amplifier 24 .
- the servo amplifier 24 supplies drive power to the servo motor 16 based on the command value.
- the wire electrode 12 moves with respect to the workpiece 14 at the relative speed of the second condition.
- step S30 The process of step S29 is continuously executed until the process of step S32, which will be described later, is performed.
- step S30 the machining condition setting unit 32 determines whether or not the moving distance of the wire electrode 12 with respect to the work 14 is equal to or greater than a predetermined distance.
- the moving distance of the wire electrode 12 is measured with the position of the wire electrode 12 at the time when the machining condition is switched from the first condition to the second condition in step S28 as a base point. If the moving distance of the wire electrode 12 is greater than or equal to the predetermined distance, the process proceeds to step S31, and if the moving distance of the wire electrode 12 is less than the predetermined distance, the process of step S30 is repeated.
- step S31 the processing condition setting unit 32 sets the processing condition to the third condition. After that, the process proceeds to step S32.
- the third condition is the discharge induced voltage applied between the electrodes, the period of applying the discharge induced voltage, the machining current supplied to the wire electrode 12, and the relative speed of the wire electrode 12 to the workpiece 14. It is a condition.
- the relative speed of the wire electrode 12 with respect to the workpiece 14 is set higher under the third condition than under the second condition. Furthermore, the machining current supplied to the wire electrode 12 is set to a higher current under the third condition than under the second condition.
- the third condition may be the same as the second condition, or the third condition may be different from the second condition.
- the period of applying the discharge inducing voltage the third condition may be the same as the second condition, or the third condition may be different from the second condition.
- the machining current supplied to the wire electrode 12 is set to the second condition.
- the current may be set to the same magnitude as the condition of .
- the relative speed of the wire electrode 12 with respect to the work 14 is set to the second condition. may be set to the same speed as the condition of
- step S ⁇ b>32 the discharge induction voltage control section 34 outputs a command value based on the third condition to the discharge induction circuit 20 .
- the discharge induction circuit 20 applies the discharge induction voltage of the third condition between the electrodes at the period of the third condition.
- the machining current control unit 36 outputs a command value based on the third condition to the main discharge circuit 22 .
- the main discharge circuit 22 supplies the wire electrode 12 with the machining current of the third condition.
- the servo controller 38 outputs a command value based on the third condition to the servo amplifier 24 .
- the servo amplifier 24 supplies drive power to the servo motor 16 based on the command value.
- step S32 is continuously executed until the machining conditions are changed even after the approach process is finished.
- the counting section 30 when it is determined that no electrical discharge has occurred between the electrodes within the unit time, the counting section 30 resets the number of determinations.
- the machining condition setting unit 32 switches the machining condition from the first condition to the second condition when it is continuously determined that an electric discharge has occurred between the electrodes within the unit time, and the number of determinations reaches a predetermined number of times. .
- the timing for switching the machining conditions from the first condition to the second condition can be set at the time when the wire electrode 12 approaches the machining end surface 40 . Therefore, the time required for the wire electrode 12 to reach the processed end surface 40 can be shortened, and the processing time can also be shortened.
- the configuration of the wire electric discharge machine 10 of the third embodiment is the same as that of the wire electric discharge machine 10 of the first embodiment.
- the contents of the approach process performed by the control device 26 of the third embodiment are partially different from the contents of the approach process of the first embodiment.
- FIG. 7 is a flowchart showing the flow of approach processing performed by the control device 26.
- the approach process is executed each time the wire electrode 12 approaches the machining end surface 40 of the workpiece 14 .
- step S41 the processing condition setting unit 32 sets the processing condition to the first condition.
- the first condition is the discharge induced voltage applied between the electrodes, the period of applying the discharge induced voltage, the machining current supplied to the wire electrode 12, and the relative speed of the wire electrode 12 with respect to the workpiece 14. It is a condition.
- step S ⁇ b>42 the discharge induction voltage control unit 34 outputs the command value based on the first condition to the discharge induction circuit 20 .
- the discharge induction circuit 20 applies the discharge induction voltage of the first condition between the electrodes in the cycle of the first condition.
- the machining current control unit 36 outputs a command value based on the first condition to the main discharge circuit 22 .
- the main discharge circuit 22 supplies the machining current of the first condition to the wire electrode 12 .
- the servo controller 38 outputs a command value based on the first condition to the servo amplifier 24 .
- the servo amplifier 24 supplies drive power to the servo motor 16 based on the command value.
- the wire electrode 12 moves with respect to the workpiece 14 at the relative speed of the first condition.
- step S43 The process of step S42 is continuously executed until the process of step S50, which will be described later, is performed.
- step S43 the discharge determination unit 28 determines whether or not the unit time has passed. If the unit time has elapsed, the process proceeds to step S44, and if the unit time has not elapsed, the process of step S43 is repeated. The determination as to whether or not the unit time has passed is made based on the elapsed time, whichever is later of the starting time of the approach process and the time at which it was previously determined that the unit time has passed in step S43.
- step S44 the discharge determination unit 28 determines whether or not a discharge has occurred between the electrodes within a unit time. If the discharge occurs, the process proceeds to step S45, and if the discharge does not occur, the process returns to step S43. Whether or not the discharge has occurred between the electrodes within the unit time can be determined based on, for example, the average value of the voltage between the electrodes within the unit time. When the average value of the inter-electrode voltage within the unit time is equal to or lower than the predetermined voltage, it is determined that the discharge has occurred between the electrodes within the unit time.
- step S45 the counting unit 30 increments the number of times it is determined that a discharge has occurred between electrodes within a unit time (hereinafter referred to as the number of determinations). After that, the process proceeds to step S46.
- the number of determinations is counted as one regardless of whether the number of discharges occurring between the electrodes within a unit time is one or multiple times.
- step S46 the processing condition setting unit 32 determines whether or not the number of times of determination is equal to or greater than a predetermined number of times. If the number of determinations is equal to or greater than the predetermined number of times, the process proceeds to step S49, and if the number of determinations is less than the predetermined number of times, the process proceeds to step S47.
- step S47 the counting unit 30 determines whether or not a predetermined time has passed. If the predetermined time has passed, the process proceeds to step S48, and if the predetermined time has not passed, the process returns to step S43.
- the predetermined time is set to be longer than the unit time. The determination as to whether or not the predetermined time has passed is made based on the elapsed time from the starting time of the approach process and the time at which it was previously determined that the predetermined time had passed in step S47, whichever is later.
- step S48 the counting unit 30 resets the number of determinations. After that, the process returns to step S43.
- step S49 the processing condition setting unit 32 sets the processing condition to the second condition.
- the second condition is the discharge induced voltage applied between the electrodes, the period of applying the discharge induced voltage, the machining current supplied to the wire electrode 12, and the relative speed of the wire electrode 12 to the workpiece 14. It is a condition.
- the second condition is set to a speed slower than the first condition.
- the second condition may be the same as the first condition, or the second condition may be different from the first condition.
- the second condition may be the same as the first condition, or the second condition may be different from the first condition for the discharge induced voltage applied between the electrodes.
- the second condition may be the same as the first condition, or the second condition may be different from the first condition with respect to the period of applying the discharge inducing voltage.
- step S ⁇ b>50 the discharge induction voltage control unit 34 outputs a command value based on the second condition to the discharge induction circuit 20 .
- the discharge induction circuit 20 applies the discharge induction voltage of the second condition between the electrodes at the period of the second condition.
- the machining current control unit 36 outputs a command value based on the second condition to the main discharge circuit 22 .
- the main discharge circuit 22 supplies the wire electrode 12 with the machining current of the second condition.
- the servo controller 38 outputs a command value based on the second condition to the servo amplifier 24 .
- the servo amplifier 24 supplies drive power to the servo motor 16 based on the command value.
- the wire electrode 12 moves with respect to the workpiece 14 at the relative speed of the second condition.
- step S51 the machining condition setting unit 32 determines whether or not the moving distance of the wire electrode 12 with respect to the workpiece 14 is equal to or greater than a predetermined distance.
- the movement distance of the wire electrode 12 is measured with the position of the wire electrode 12 at the time when the machining condition is switched from the first condition to the second condition in step S50 as a base point. If the moving distance of the wire electrode 12 is greater than or equal to the predetermined distance, the process proceeds to step S52, and if the moving distance of the wire electrode 12 is less than the predetermined distance, the process of step S51 is repeated.
- the processing condition setting unit 32 sets the processing condition to the third condition. After that, the process proceeds to step S53.
- the third condition is the discharge induced voltage applied between the electrodes, the period of applying the discharge induced voltage, the machining current supplied to the wire electrode 12, and the relative speed of the wire electrode 12 to the workpiece 14. It is a condition.
- the relative speed of the wire electrode 12 with respect to the workpiece 14 is set higher under the third condition than under the second condition. Furthermore, the machining current supplied to the wire electrode 12 is set to a higher current under the third condition than under the second condition.
- the third condition may be the same as the second condition, or the third condition may be different from the second condition.
- the period of applying the discharge inducing voltage the third condition may be the same as the second condition, or the third condition may be different from the second condition.
- the machining current supplied to the wire electrode 12 is set to the second condition.
- the current may be set to the same magnitude as the condition of .
- the relative speed of the wire electrode 12 with respect to the work 14 is set to the second condition. may be set to the same speed as the condition of
- step S ⁇ b>53 the discharge induction voltage control section 34 outputs a command value based on the third condition to the discharge induction circuit 20 .
- the discharge induction circuit 20 applies the discharge induction voltage of the third condition between the electrodes at the period of the third condition.
- the machining current control unit 36 outputs a command value based on the third condition to the main discharge circuit 22 .
- the main discharge circuit 22 supplies the wire electrode 12 with the machining current of the third condition.
- the servo controller 38 outputs a command value based on the third condition to the servo amplifier 24 .
- the servo amplifier 24 supplies drive power to the servo motor 16 based on the command value.
- step S53 is continuously executed until the machining conditions are changed even after the approach process is finished.
- the counting unit 30 resets the number of determinations when the number of determinations does not reach the predetermined number of times even after a predetermined time has passed.
- the machining condition setting unit 32 switches the machining condition from the first condition to the second condition when it is continuously determined that an electric discharge has occurred between the electrodes within the unit time, and the number of determinations reaches a predetermined number of times. .
- the timing for switching the machining conditions from the first condition to the second condition can be set at the time when the wire electrode 12 approaches the machining end surface 40 . Therefore, the time required for the wire electrode 12 to reach the processed end surface 40 can be shortened, and the processing time can also be shortened.
- a wire electric discharge machine (10) for electric discharge machining comprising: a controller (36, 38), a voltage detection unit (18) for detecting the voltage between the electrodes, and the wire electrode approaching the machining end face (40) of the workpiece for machining the workpiece.
- a discharge determination unit (28) for determining whether or not a discharge has occurred between the electrodes within the unit time based on the detected voltage between the electrodes;
- a counting unit (30) that counts the number of times it is determined that the machining has been performed, and the machining condition in the case of approaching the machining end face is set to the first condition, and the counted number of times reaches a predetermined number of times a processing condition setting unit (32) for setting the processing condition to a second condition different from the first condition.
- the counting unit may reset the counted number of times when it is determined that no discharge occurs between the electrodes within the unit time.
- the counting unit starts counting the number of times it is determined that an electric discharge has occurred, and if a predetermined time longer than the unit time has elapsed, may be reset.
- the second condition may be a condition in which the relative speed of the wire electrode with respect to the workpiece is slower than the first condition.
- the machining condition setting unit sets the machining condition to the second condition, and if the moving distance of the wire electrode with respect to the workpiece reaches a predetermined distance,
- the processing conditions may be set to third conditions different from the second conditions.
- the third condition is that the relative speed of the wire electrode with respect to the workpiece is higher than that of the second condition, and the electric discharge energy generated between the electrodes is At least one of conditions higher than the second condition may be used.
- a control method for a wire electric discharge machine (10) for performing electric discharge machining comprising a voltage detection unit (18) for detecting the voltage between the electrodes, for machining the workpiece.
- a first machining condition setting step of setting a machining condition to a first condition when the wire electrode is approaching the machining end face (40) of the workpiece; and according to the first condition, a first control step of controlling the relative speed of the wire electrode with respect to the workpiece and the discharge energy generated between the electrodes; Based on the voltage between the electrodes, for each unit time, a discharge determination step of determining whether or not a discharge has occurred between the electrodes within the unit time, and counting the number of times it is determined that the discharge has occurred a second machining condition setting step of setting the machining condition to a second condition different from the first condition when the counted number of times reaches a predetermined number of times; and a second control step of controlling the relative velocity of the wire electrode with respect to the workpiece and the discharge energy generated between the electrodes according to conditions.
- the count step may reset the counted number of times when it is determined that no discharge occurs between the electrodes within the unit time.
- the second condition may be a condition that the relative speed of the wire electrode with respect to the workpiece is slower than the first condition.
- the third condition is a condition in which the relative speed of the wire electrode with respect to the workpiece is higher than that in the second condition, and a condition is generated between the electrodes. At least one of the conditions in which the discharge energy is higher than the second condition may be used.
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Abstract
Description
[ワイヤ放電加工機の構成]
図1はワイヤ放電加工機10の構成図である。ワイヤ放電加工機10は、ワイヤ電極12をワーク(被加工物)14に対して相対移動させながら、ワイヤ電極12とワーク14との極間に放電を生じさせて加工を行う。ワーク14は、図示しないワークテーブルに設置される。サーボモータ16がワークテーブルをX軸方向及びY軸方向に移動することにより、ワイヤ電極12はワーク14に対して相対移動する。
図2は、制御装置26において行われるアプローチ処理の流れを示すフローチャートである。アプローチ処理は、ワイヤ電極12がワーク14の加工端面40(図3及び図5参照)にアプローチする度に実行される。加工端面40とは、ワーク14の加工開始時にワイヤ電極12がアプローチするワーク14の表面を示す。
ステップS11において、放電誘起電圧制御部34は、第3の条件に基づく指令値を、放電誘起回路20に出力する。放電誘起回路20は、第3の条件の周期で、第3の条件の放電誘起電圧を極間に印加する。また、加工電流制御部36は、第3の条件に基づく指令値を、主放電回路22に出力する。主放電回路22は、第3の条件の加工電流をワイヤ電極12に供給する。また、サーボコントローラ38は、第3の条件に基づく指令値を、サーボアンプ24に出力する。サーボアンプ24は、指令値に基づいて駆動電力をサーボモータ16に供給する。これにより、第3の条件の相対速度で、ワイヤ電極12がワーク14に対して移動する。その後、アプローチ処理を終了する。アプローチ処理が終了した後は、加工プログラムにしたがってワーク14の放電加工が行われる。このステップS11の工程は、アプローチ処理が終了した後も加工条件の変更が行われるまで、継続して実行される。
図3は、ワイヤ電極12がワーク14の加工端面40にアプローチし、ワイヤ電極12が加工端面40から放電加工しながらワーク14内に進入する様子を示す模式図である。
第2実施形態のワイヤ放電加工機10の構成は、第1実施形態のワイヤ放電加工機10と同じである。しかし、第2実施形態の制御装置26において行われるアプローチ処理の内容が、第1実施形態のアプローチ処理の内容と一部異なる。
ステップS32において、放電誘起電圧制御部34は、第3の条件に基づく指令値を、放電誘起回路20に出力する。放電誘起回路20は、第3の条件の周期で、第3の条件の放電誘起電圧を極間に印加する。また、加工電流制御部36は、第3の条件に基づく指令値を、主放電回路22に出力する。主放電回路22は、第3の条件の加工電流をワイヤ電極12に供給する。また、サーボコントローラ38は、第3の条件に基づく指令値を、サーボアンプ24に出力する。サーボアンプ24は、指令値に基づいて駆動電力をサーボモータ16に供給する。これにより、第3の条件の相対速度で、ワイヤ電極12がワーク14に対して移動する。その後、アプローチ処理を終了する。アプローチ処理が終了した後は、加工プログラムにしたがってワーク14の放電加工が行われる。このステップS32の工程は、アプローチ処理が終了した後も加工条件の変更が行われるまで、継続して実行される。
ワイヤ電極12が加工溝48を通過中である場合には、極間に放電が発生したとしても、放電の発生は単発的であり、連続して放電が発生することはない。一方、ワイヤ電極12が加工端面40に接近した場合には、連続して放電が発生する。
第3実施形態のワイヤ放電加工機10の構成は、第1実施形態のワイヤ放電加工機10と同じである。しかし、第3実施形態の制御装置26において行われるアプローチ処理の内容が、第1実施形態のアプローチ処理の内容と一部異なる。
ステップS53において、放電誘起電圧制御部34は、第3の条件に基づく指令値を、放電誘起回路20に出力する。放電誘起回路20は、第3の条件の周期で、第3の条件の放電誘起電圧を極間に印加する。また、加工電流制御部36は、第3の条件に基づく指令値を、主放電回路22に出力する。主放電回路22は、第3の条件の加工電流をワイヤ電極12に供給する。また、サーボコントローラ38は、第3の条件に基づく指令値を、サーボアンプ24に出力する。サーボアンプ24は、指令値に基づいて駆動電力をサーボモータ16に供給する。これにより、第3の条件の相対速度で、ワイヤ電極12がワーク14に対して移動する。その後、アプローチ処理を終了する。アプローチ処理が終了した後は、加工プログラムにしたがってワーク14の放電加工が行われる。このステップS53の工程は、アプローチ処理が終了した後も加工条件の変更が行われるまで、継続して実行される。
ワイヤ電極12が加工溝48を通過中である場合には、極間に放電が発生したとしても、放電の発生は単発的であり、連続して放電が発生することはない。一方、ワイヤ電極12が加工端面40に接近した場合には、連続して放電が発生する。
上記実施形態から把握し得る発明について、以下に記載する。
Claims (12)
- 被加工物(14)に対してワイヤ電極(12)を相対移動させながら、前記ワイヤ電極と前記被加工物との極間に電圧を印加させて放電を発生させることにより、前記被加工物の放電加工を行うワイヤ放電加工機(10)であって、
加工条件にしたがって、前記被加工物に対する前記ワイヤ電極の相対速度、及び、前記極間に発生させる放電エネルギを制御する制御部(36、38)と、
前記極間の電圧を検出する電圧検出部(18)と、
前記被加工物を加工するために前記ワイヤ電極が前記被加工物の加工端面(40)に向けてアプローチしている場合に、検出された前記極間の電圧に基づいて、単位時間毎に、前記単位時間内において前記極間に放電が発生したか否かを判定する放電判定部(28)と、
放電が発生したと判定された回数をカウントするカウント部(30)と、
前記加工端面にアプローチしている場合の前記加工条件を第1の条件に設定し、前記カウントされた回数が所定回数に達した場合には前記加工条件を前記第1の条件とは異なる第2の条件に設定する加工条件設定部(32)と、
を備える、ワイヤ放電加工機。 - 請求項1に記載のワイヤ放電加工機であって、
前記カウント部は、前記単位時間内において前記極間に放電が発生しなかったと判定された場合には、カウントした回数をリセットする、ワイヤ放電加工機。 - 請求項1又は2に記載のワイヤ放電加工機であって、
前記カウント部は、放電が発生したと判定された回数のカウントを開始してから、前記単位時間よりも長い所定時間が経過した場合には、カウントした回数をリセットする、ワイヤ放電加工機。 - 請求項1~3のいずれか1項に記載のワイヤ放電加工機であって、
前記第2の条件は、前記被加工物に対する前記ワイヤ電極の相対速度が前記第1の条件よりも遅い条件である、ワイヤ放電加工機。 - 請求項1~4のいずれか1項に記載のワイヤ放電加工機であって、
前記加工条件設定部は、前記加工条件を前記第2の条件に設定した後に、前記被加工物に対する前記ワイヤ電極の移動距離が所定距離に達した場合は前記加工条件を前記第2の条件とは異なる第3の条件に設定する、ワイヤ放電加工機。 - 請求項5に記載のワイヤ放電加工機であって、
前記第3の条件は、前記被加工物に対する前記ワイヤ電極の相対速度が前記第2の条件よりも速い条件、及び、前記極間に発生させる放電エネルギが前記第2の条件よりも高い条件の少なくとも一方である、ワイヤ放電加工機。 - 被加工物(14)に対してワイヤ電極(12)を相対移動させながら、前記ワイヤ電極と前記被加工物との極間に電圧を印加させて放電を発生させることにより、前記被加工物の放電加工を行うワイヤ放電加工機(10)の制御方法であって、
前記ワイヤ放電加工機は、前記極間の電圧を検出する電圧検出部(18)を備え、
前記被加工物を加工するために前記ワイヤ電極が前記被加工物の加工端面(40)に向けてアプローチしている場合の加工条件を第1の条件に設定する第1加工条件設定ステップと、
前記第1の条件にしたがって、前記被加工物に対する前記ワイヤ電極の相対速度、及び、前記極間に発生させる放電エネルギを制御する第1制御ステップと、
前記ワイヤ電極が前記加工端面に向けてアプローチしている場合に、検出された前記極間の電圧に基づいて、単位時間毎に、前記単位時間内において前記極間に放電が発生したか否かを判定する放電判定ステップと、
放電が発生したと判定された回数をカウントするカウントステップと、
前記カウントされた回数が所定回数に達した場合には前記加工条件を前記第1の条件とは異なる第2の条件に設定する第2加工条件設定ステップと、
前記第2の条件にしたがって、前記被加工物に対する前記ワイヤ電極の相対速度、及び、前記極間に発生させる放電エネルギを制御する第2制御ステップと、
を備える、ワイヤ放電加工機の制御方法。 - 請求項7に記載のワイヤ放電加工機の制御方法であって、
前記カウントステップは、前記単位時間内において前記極間に放電が発生しなかったと判定された場合には、カウントした回数をリセットする、ワイヤ放電加工機の制御方法。 - 請求項7又は8に記載のワイヤ放電加工機の制御方法であって、
前記カウントステップは、放電が発生したと判定された回数のカウントを開始してから、前記単位時間よりも長い所定時間が経過した場合には、カウントした回数をリセットする、ワイヤ放電加工機の制御方法。 - 請求項7~9のいずれか1項に記載のワイヤ放電加工機の制御方法であって、
前記第2の条件は、前記被加工物に対する前記ワイヤ電極の相対速度が前記第1の条件よりも遅い条件である、ワイヤ放電加工機の制御方法。 - 請求項7~10のいずれか1項に記載のワイヤ放電加工機の制御方法であって、
前記加工条件が前記第2の条件に設定された後に、前記被加工物に対する前記ワイヤ電極の移動距離が所定距離に達した場合は前記加工条件を前記第2の条件とは異なる第3の条件に設定する第3加工条件設定ステップを備える、ワイヤ放電加工機の制御方法。 - 請求項11に記載のワイヤ放電加工機の制御方法であって、
前記第3の条件は、前記被加工物に対する前記ワイヤ電極の相対速度が前記第2の条件よりも速い条件、及び、前記極間に発生させる放電エネルギが前記第2の条件よりも高い条件の少なくとも一方である、ワイヤ放電加工機の制御方法。
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CN202180074588.3A CN116547097A (zh) | 2020-11-06 | 2021-11-01 | 线放电加工机以及线放电加工机的控制方法 |
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US (1) | US20230390844A1 (ja) |
EP (1) | EP4219053A1 (ja) |
JP (1) | JP7068564B1 (ja) |
KR (1) | KR20230073332A (ja) |
CN (1) | CN116547097A (ja) |
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JPH02256425A (ja) * | 1988-08-19 | 1990-10-17 | Mitsubishi Electric Corp | ワイヤ放電加工装置のワイヤ断線復帰方法 |
JP2722146B2 (ja) * | 1991-10-11 | 1998-03-04 | 株式会社牧野フライス製作所 | ワイヤ放電加工機の加工条件制御方法 |
JPH08197335A (ja) * | 1995-01-27 | 1996-08-06 | Fanuc Ltd | ワイヤ放電加工機における断線検出方法 |
JP4037017B2 (ja) | 1999-10-18 | 2008-01-23 | 三菱電機株式会社 | ワイヤ放電加工装置 |
JP4159566B2 (ja) * | 2004-06-02 | 2008-10-01 | ファナック株式会社 | ワイヤ放電加工機の制御装置 |
JP5104330B2 (ja) | 2008-01-16 | 2012-12-19 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
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JPWO2022097596A1 (ja) | 2022-05-12 |
EP4219053A1 (en) | 2023-08-02 |
TW202218782A (zh) | 2022-05-16 |
CN116547097A (zh) | 2023-08-04 |
WO2022097596A1 (ja) | 2022-05-12 |
JP7068564B1 (ja) | 2022-05-16 |
KR20230073332A (ko) | 2023-05-25 |
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