Power Supply-Control Device for Electrical Discharge Machining Apparatus
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Accused Products
Abstract
A power-supply control device includes a high-frequency component detecting unit, a machining voltage level detecting device, and a pulse control device. The high-frequency component detecting unit detects a high-frequency component of discharge voltage at a machining gap. The machining voltage level detecting device detects a discharge voltage level at the machining gap. The high-frequency component is compared with a reference high-frequency component to obtain a first comparison result. The discharge voltage level is compared with a reference voltage level to obtain a second comparison result. The pulse control device controls pulse off time based on the first comparison result, and cuts off a discharge pulse based on the second comparison result.
18 Citations
20 Claims
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1-10. -10. (canceled)
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11. A power-supply control device that controls discharge pulse supplied to an electrical discharge machining apparatus that machines a workpiece by generating pulse discharge in a machining gap between a machining electrode and the workpiece, the power-supply control device comprising:
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a high-frequency component detecting unit that detects a high-frequency component of discharge voltage at the machining gap; a voltage level detecting unit that detects a voltage level of the discharge voltage; a high-frequency component comparing unit that compares detected high-frequency component with a reference high-frequency component to obtain a first comparison result; a voltage level comparing unit that compares detected voltage level with a reference voltage level to obtain a second comparison result; and a pulse control unit that controls pulse off time, the pulse off time being an interval between discharge pulses, based on the first comparison result, and cuts off a discharge pulse based on the second comparison result. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification