EDM Of a roll using segmented electrode short-circuited in the r

Details EDM Of a roll using segmented electrode short-circuited in the r EDM Of a roll using segmented electrode short-circuited in the r

1982-09-27

1984-09-11

Envall, Jr., Roy N.

Electric heating

Metal heating

Cutting or disintegrating

219 69E, 219 69C, B23P 120

Patent

active

044711999

ABSTRACT:
There is disclosed a method for electrical discharge machining of a workpiece in the form of a roll by application of an electrical voltage across said workpiece and an electrode or electrodes mounted opposite to each other with a predetermined gap therebetween, and more particularly such method wherein each such electrode is formed by plural electrode segments separated from one another by insulators, and the electrical discharge operation is performed with said electrode segments in each electrode short-circuited to one another in the rough machining step and with said electrode segments insulated from one another in the finish machining step for reducing the working time.

REFERENCES:
patent: 3067317 (1962-12-01), Buro
patent: 3832510 (1974-08-01), Pfau et al.
patent: 4219718 (1980-08-01), Sato et al.
patent: 4221952 (1980-09-01), Sato et al.
patent: 4230927 (1980-10-01), Sato et al.
patent: 4233485 (1980-11-01), Sato et al.
patent: 4242557 (1980-12-01), Sato et al.
patent: 4247748 (1981-01-01), Sato et al.
patent: 4287403 (1981-09-01), Sato et al.

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