Method and apparatus for controlling an electro-discharge machin

Details Method and apparatus for controlling an electro-discharge machin Method and apparatus for controlling an electro-discharge machin

1977-04-06

1978-08-15

Reynolds, Bruce A.

Electric heating

Metal heating

Cutting or disintegrating

219 69G, 219 69M, B23P 108

Patent

active

041075048

ABSTRACT:
A pair of complementary rod electrodes, one of which machines the other, is added to the circuitry of an electro-discharge machining system in which holes are drilled into existing passages in a workpiece, by other machining electrodes. When a machining electrode breaks into the passage, the resulting sharp increase in electrical potential thereacross is prevented from affecting the electrode advance control mechanism because the mechanism only senses the low potential across the continuously machining rod electrodes. Thus the electrode which machines the workpiece is prevented from rapidly traversing the passage and machining the opposite wall.

REFERENCES:
patent: 2783411 (1957-02-01), Matulaitis
patent: 3995134 (1976-11-01), Dudden
patent: 4049942 (1977-09-01), Balleys et al.

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