Electric heating – Metal heating – Cutting or disintegrating
Patent
1977-02-07
1980-07-08
Kozma, Thomas J.
Electric heating
Metal heating
Cutting or disintegrating
219 69C, B23P 108
Patent
active
042119081
ABSTRACT:
A method and apparatus for electrical discharge machining are disclosed. The method includes the use of a bipolar pulsating voltage to improve the quality of a discharge machining operation. The use of an intermittent AC voltage and an intermittent AC voltage with an intermittent DC voltage interposed during the quiescent periods thereof is also disclosed. A water bath for discharge machining is disclosed, as is a novel circuit for producing bipolar pulsating power and a novel apparatus for combining a plurality of such power supplies and insuring that all output power is maintained in the same phase. Electrode shielding and automatic drive methods and apparatus are disclosed as is a novel capacitive electrode coupling technique.
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Kozma Thomas J.
Mitsubishi Denki & Kabushiki Kaisha
Shaw Clifford C.
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