Electric discharge machining method

Details Electric discharge machining method Electric discharge machining method

1978-08-01

1980-09-09

Reynolds, Bruce H.

Electric heating

Metal heating

Cutting or disintegrating

219 69M, B23P 114

Patent

active

042219523

ABSTRACT:
There is disclosed an electric discharge machining method in which the discharge working gap between an electrode and a work piece is automatically adjusted to prevent the occurrence of a streaky pattern in the surface of the work piece due to variation in the amount of machining. After a plurality of high voltage pulses have been applied for a predetermined time across the working gap, a low voltage pulse is applied across the working gap. In response to the application of the low voltage pulse, the feeding of the electrode is controlled by a pulse motor in a direction to reduce the working gap, and as soon as the discharge is started the feed control is stopped and the discharge machining is then effected in response to the application of high voltage pulses.

REFERENCES:
patent: 3694599 (1972-09-01), Davis
patent: 3825714 (1974-07-01), Marendaz
patent: 3997753 (1976-12-01), Inoue
patent: 4021635 (1977-05-01), Losey et al.

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