Zinc or cadmium coated, surface oxidized electrode wire for EDM

Details Zinc or cadmium coated, surface oxidized electrode wire for EDM Zinc or cadmium coated, surface oxidized electrode wire for EDM

1988-06-13

1990-12-11

Pellinen, A. D.

Electric heating

Metal heating

Cutting or disintegrating

148240, 148277, 204280, 427 59, 427117, 427120, B73H 708

Patent

active

049773038

ABSTRACT:
A method for forming an EDM wire electrode includes coating a copper wire core with zinc, and then heating the coated wire in an oxidizing atmosphere to simultaneously provide a copper-zinc alloy layer over the copper core and a zinc oxide surface on the alloy layer. The oxide- and alloy-coated wire is then reduced in diameter to reduce the thickness of the alloy layer by about one-half of its initial thickness. The resulting electrodes wire permits a greater current density and a greater tractional force to be employed, yielding a significantly greater machining speed in the EDM process.

REFERENCES:
patent: Re21903 (1941-09-01), Brenneisen
patent: 2383118 (1945-08-01), Ferenci
patent: 3478552 (1969-11-01), Dane
patent: 3664169 (1972-05-01), Henrich
patent: 4250371 (1981-02-01), Haug et al.
patent: 4287404 (1981-09-01), Convers et al.
patent: 4341939 (1982-07-01), Briffod et al.
patent: 4418263 (1983-11-01), Inoue

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