Power supply unit electric discharge machining apparatus

Details Power supply unit electric discharge machining apparatus Power supply unit electric discharge machining apparatus

1990-09-14

1991-11-12

Geoffrey, S.

Electric heating

Metal heating

Cutting or disintegrating

219 6918, B23H 102

Patent

active

050649841

ABSTRACT:
A power supply unit in an electric discharge machining apparatus which is capable of supplying an AC pulse signal whose polarity is varied alternately. Due to the application of AC pulse signal to an interelectrode gap, it is possible to prevent the surface of a workpiece to be machined from being electrolytically corroded, electrolyzed and magnetized.

REFERENCES:
patent: 3558998 (1971-01-01), Bertolasi
patent: 4017705 (1977-04-01), Bazhenov et al.
patent: 4211908 (1980-07-01), Niwa
patent: 4347425 (1982-08-01), Obara
patent: 4447713 (1984-05-01), Tsurumoto et al.
patent: 4678884 (1987-07-01), Obara et al.
patent: 4678885 (1987-07-01), Dresti et al.
patent: 4720616 (1988-01-01), Inoue

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