Power supply unit for wire electrical discharge machining and method of wire electrical discharge machining
First Claim
1. A power supply unit for wire electrical discharge machining comprising an ac high-frequency power supply operable to intermittently supply an ac high-frequency voltage between a wire electrode and a workpiece to machine the workpiece,wherein a period of time during which the ac high-frequency voltage is applied by said ac high-frequency power supply is set to a predetermined time that is capable of interrupting the continuation of discharge.
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Accused Products
Abstract
A power supply unit for wire electrical discharge machining using an ac high-frequency power supply for applying an ac high-frequency voltage between a wire electrode (1a) and a workpiece (2) includes a high-frequency oscillation and amplification circuit (4) and a pulse power supply (5) which is an ac-high-frequency-voltage intermittently supplying unit for effecting the application of the ac high-frequency voltage between the electrode and the workpiece and a pause thereof. In wire electrical discharge machining using this power supply unit for wire electrical discharge machining, it is possible to suppress the vibration of the wire electrode (1a) due tog the electrostatic force acting between the wire electrode (1a) and the workpiece (2), making it possible to improve the straightness accuracy of a machined surface of the workpiece (2) and make surface roughness small.
18 Citations
12 Claims
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1. A power supply unit for wire electrical discharge machining comprising an ac high-frequency power supply operable to intermittently supply an ac high-frequency voltage between a wire electrode and a workpiece to machine the workpiece,
wherein a period of time during which the ac high-frequency voltage is applied by said ac high-frequency power supply is set to a predetermined time that is capable of interrupting the continuation of discharge.
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5. A power supply unit for wire electrical discharge machining comprising an ac high-frequency power supply for applying an ac high-frequency voltage between a wire electrode and a workpiece by making smaller at a predetermined ratio an absolute value of the ac high-frequency voltage in a second predetermined time than an absolute value of the ac high-frequency voltage in a first predetermined time, and which repeatedly supplies the variable voltage,
wherein the first period of time during which the ac high-frequency voltage is applied by said ac high-frequency power supply is set to a predetermined time which is capable of interrupting the continuation of discharge.
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9. A method of wire electrical discharge machining for machining a workpiece by supplying an ac high-frequency voltage between a wire electrode and the workpiece, wherein the ac high-frequency voltage is applied between the electrode and the workpiece by making smaller at a predetermined ratio an absolute value of the ac high-frequency voltage in a second predetermined time than an absolute value of the ac high-frequency voltage in a first predetermined time, and the variable voltage is repeatedly applied
wherein the first period of time during which the ac high-frequency voltage is applied by said ac high-frequency power supply is set to a predetermined time which is capable of interrupting the continuation of discharge.
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11. A method of wire electrical discharge machining for machining a workpiece by supplying an ac high-frequency voltage between a wire electrode and the workpiece, wherein:
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the ac high-frequency voltage is intermittently applied between the wire electrode and the workpiece to machine the workpiece, and a period of time during which the ac high-frequency voltage is applied is set to a predetermined time that is capable of interrupting the continuation of discharge. - View Dependent Claims (12)
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Specification