Discharge machining apparatus

Details Discharge machining apparatus Discharge machining apparatus

1997-12-05

2000-03-28

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

219 6919, B23H 102, B23H 716

Patent

active

060434473

ABSTRACT:
In machining, a short-circuit determination reference time stored in a parameter memory is changed by a short-circuit determination reference time changing device in response to rpm or a rotational speed of a rotating electrode, duration of a short-circuit detected between the electrodes is measured by a short-circuit duration time determining device, and a short-circuit evading operation is executed by a short-circuit back control device in a case where the duration of a short-circuit has surpassed the short-circuit determination reference time.

REFERENCES:
patent: 4608476 (1986-08-01), Shimizu
patent: 4733040 (1988-03-01), Pelloni et al.
patent: 5051554 (1991-09-01), Tsukamoto
patent: 5064985 (1991-11-01), Yoshizawa et al.
patent: 5354961 (1994-10-01), Diot et al.
patent: 5847352 (1998-12-01), Yuzawa et al.
patent: 5852268 (1998-12-01), Buhler et al.
patent: 5919380 (1999-07-01), Magara et al.

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