Method and apparatus for adjusting the gap in an electric discha

Details Method and apparatus for adjusting the gap in an electric discha Method and apparatus for adjusting the gap in an electric discha

1978-07-31

1981-09-01

Shaw, C. C.

Electric heating

Metal heating

Cutting or disintegrating

219 69G, B23P 102

Patent

active

042874033

ABSTRACT:
Disclosed is an electric discharge machining method in which the electric discharge working gap between an electrode and a work piece to be machined is automatically adjusted. To detect the condition of the discharge working gap, a low voltage pulse is applied each time a plurality of high voltage pulse for electric discharge machining are applied for a predetermined time. The working current resulting from the application of each low voltage pulse is detected to control the feeding of the electrode and thereby to automatically adjust the discharge working gap to a predetermined value.

REFERENCES:
patent: 2979639 (1961-04-01), Williams et al.
patent: 3789182 (1974-01-01), Verner
patent: 3878353 (1975-04-01), Anderson
patent: 4021635 (1977-05-01), Losey et al.

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