Method and generator for electrical discharge machining

Details Method and generator for electrical discharge machining Method and generator for electrical discharge machining

2006-07-31

2010-10-19

Evans, Geoffrey S (Department: 3742)

Electric heating

Metal heating

Cutting or disintegrating

C219S069130

Reexamination Certificate

active

07816620

ABSTRACT:
The invention relates to a method and generator for generating a time sequence of EDM pulses having a predefined ignition voltage for electrical discharge machining. An AC voltage is generated from a DC voltage, furnished by a bipolar current source. The AC voltage is applied to an isolating transformer disposed between the bipolar current source and the spark gap. A first pulse capacitor is charged by the bipolar current source to a voltage corresponding to the ignition voltage. The ignition voltage provided by the isolating transformer is switched with a selected polarity to the spark gap.

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Machine translation of Japan Patent No. 10-217,032, Feb. 2010.

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