Machining power supply for wire electrical discharge machine

Details Machining power supply for wire electrical discharge machine Machining power supply for wire electrical discharge machine

2006-05-16

2006-05-16

Evans, Geoffrey S. (Department: 1725)

Electric heating

Metal heating

Cutting or disintegrating

C219S069130

Reexamination Certificate

active

07045735

ABSTRACT:
Machining electrical power supply device for wire electrical discharge machining. Includes an electrical discharge state distinguishing circuit (6) for distinguishing at least two inter-electrode states, including electrical shorting and normal electrical discharge, between a wire electrode (E) and a workpiece (W), and an inter-electrode current waveform control means for supplying, and for switching between supply of, a triangular wave and a trapezoidal wave current to the electrodes. According to the inter-electrode state distinguished by the electrical discharge state distinguishing circuit (6), in cases where the inter-electrode state is that of electrical shorting (Y1), the inter-electrode current waveform control means supplies a triangular wave current (I) to the electrodes, and in cases where the inter-electrode state is that of normal electrical discharge (Y3), it supplies a trapezoidal wave current (I) to the electrodes. Breakage of the wire electrode (E) can be avoided and machining speed can be improved.

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