Process and apparatus for high frequency discharge shaping of a

Details Process and apparatus for high frequency discharge shaping of a Process and apparatus for high frequency discharge shaping of a

1981-09-03

1984-05-08

Paschall, M. H.

Electric heating

Metal heating

Cutting or disintegrating

219 69M, 219 69C, B23P 108

Patent

active

044476965

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.

REFERENCES:
patent: 3417006 (1968-12-01), Inoue
patent: 3459916 (1969-08-01), Ferguson
patent: 3668361 (1972-06-01), O'Connor

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