Process and apparatus for eliminating short circuits in electric

Details Process and apparatus for eliminating short circuits in electric Process and apparatus for eliminating short circuits in electric

1980-01-04

1981-12-15

Shaw, C. C.

Electric heating

Metal heating

Cutting or disintegrating

219695, 219 69C, 219 69M, B23P 102

Patent

active

043061362

ABSTRACT:
A process and apparatus for increasing the frequency of the effective machining electrical discharges between the electrode workpiece and the electrode tool of an EDM apparatus. The process of the invention consists in monitoring the electrical parameters in the machining zone between the electrodes such as to detect short circuits, and, when a short circuit is detected, in continuing monitoring the electrical parameters until monitoring indicates the disappearance of the short circuit, in cutting off the ongoing electrical discharge after a predetermined time interval following the moment at which said short circuit disappears and in re-establishing normal electrical voltage pulses after another time interval following the end of the discharge. The invention also provides appropriate apparatus for practicing the process.

REFERENCES:
patent: Re29589 (1978-03-01), Inoue
patent: 3609281 (1971-09-01), Kauffman
patent: 3614368 (1971-10-01), Lobur
patent: 3832511 (1974-08-01), Bell, Jr. et al.
patent: 3916138 (1975-10-01), Pfau
patent: 3996445 (1976-12-01), Wohlabaugh

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