Method and generator for electrical discharge machining

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

2006-07-28

2010-10-12

Evans, Geoffrey S (Department: 3742)

Electric heating

Metal heating

Cutting or disintegrating

Reexamination Certificate

active

07812277

ABSTRACT:
The invention relates to a method and a generator for generating a time sequence of discharge pulses for EDM machining wherein a pulse capacitor (22) for generating the discharge pulse is charged with a charging voltage (U_chrg) and then discharged into the spark gap. The pulse capacitor (22) after being discharged is recharged with a charging voltage (U_chrg) having the same polarity as that of the residual voltage (U_end) remaining at the pulse capacitor (22) after its discharge. Thereafter, the pulse capacitor (22) is discharged with a discharge pulse into the spark gap, wherein the polarity of the discharge pulse is independent of the polarity of the charging voltage (U_chrg) at the pulse capacitor (22) after its recharge.

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patent: 2002/0162823 (2002-11-01), Lin

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