Discharge machining apparatus having means for distinguishing ab

Details Discharge machining apparatus having means for distinguishing ab Discharge machining apparatus having means for distinguishing ab

1984-05-02

1990-01-09

Pellinen, A. D.

Electric heating

Metal heating

Cutting or disintegrating

219 6914, 219 6916, 219 6918, B23H 102, B23H 110

Patent

active

048929891

ABSTRACT:
A discharge machining apparatus includes an electrode disposed in confronting relation to a workpiece with an insulative machining solution interposed therebetween for machining the workpiece by an electric discharge generated across an interelectrode gap between the electrode and the workpiece, a detector device for detecting a distribution of times to generate the discharge across the interelectrode gap after a voltage has been applied thereacross, and interelectrode condition discriminator for comparing a distribution of times as detected by the detector means after the voltage has been applied across the interelectrode gap and before the discharge is generated thereacross to produce a signal indicative of a determined condition of the interelectrode gap.

REFERENCES:
patent: 3588428 (1971-06-01), Sennowitz
patent: 3627968 (1971-12-01), Sennowitz
patent: 3705286 (1972-12-01), Kondo et al.
patent: 3812317 (1974-05-01), De Bont et al.
patent: 3816692 (1974-06-01), Ratmansky
patent: 3825715 (1974-07-01), Saito et al.
patent: 3857011 (1974-12-01), Saito et al.
patent: 3997753 (1976-12-01), Inoue
patent: 4004123 (1977-01-01), Inoue
patent: 4249059 (1981-02-01), Bell, Jr. et al.
patent: 4375588 (1983-03-01), Frei

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