Method of and apparatus for detecting gap conditions in EDM proc

Details Method of and apparatus for detecting gap conditions in EDM proc Method of and apparatus for detecting gap conditions in EDM proc

1980-01-16

1983-03-15

Shaw, C. C.

Electric heating

Metal heating

Cutting or disintegrating

219 69P, 219 69C, B23P 102

Patent

active

043768806

ABSTRACT:
Method of and apparatus for controlling electric discharge machining processes in which machining pulses are applied across a machining gap with a pulse duration and peak current preselected to attain a predetermined machining consequence or result. At least one monitoring pulse is interposed in the succession of machining pulses and is time-spaced from and totally independent of the machining pulses while being dimensioned to give rise to a current pulse in the machining gap. The current pulse is measured as to at least one characteristic and the gap condition is determined in response to this measurement. sp

REFERENCES:
patent: 3609281 (1971-09-01), Kauffman
patent: 3864541 (1975-02-01), Inoue
patent: 3988560 (1976-10-01), Losey et al.
patent: 3997753 (1976-12-01), Inoue
patent: 4021635 (1977-05-01), Losey et al.
patent: 4236057 (1980-11-01), Inoue

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