Device for electrical discharge machining using a variable capacitance and a variable inductance

摘要

Electrical discharge machining - a device for machining a workpiece with the application of an alternating current - high frequency - voltage to a machining gap (6), formed between an electrode and a workpiece, comprising:– a power supply device (11) for supplying the voltage; and– an impedance - matching circuit (12) between the power supply device (11) and the machining gap, (6) wherein the impedance - matching circuit (12) a plurality of variable capacitance - means (40a, 40b, 40c, 40d) comprises, at least one inductance - means (14), and a switching device (41a, 41b, 41c, 41d) for switching under of the plurality of variable capacitance - means (40a, 40b, 40c, 40d) for carrying out of the impedance matching, wherein the variable capacitance - means (40a, 40b, 40c, 40d) capacitance values have a geometric series.