Method of forming electro-discharge machining electrode

Details Method of forming electro-discharge machining electrode Method of forming electro-discharge machining electrode

1987-06-01

1989-04-11

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Electrical device making

29882, H01R 4300

Patent

active

048193259

ABSTRACT:
An improved electrode for producing cone-shaped diffusion openings in the wall of an air-cooled rotor blade of a jet engine or other gas turbine by means of electro-discharge-machining (EDM), is described. The electrode has a needle-like forward end section for forming a round air metering hole, and a cone-like head section which permits the formation of a cone-shaped diffusion opening. The hole and the diffusion opening are formed with a single electrode in one operation. Also described is the method of forming such an electrode by a coining step.

REFERENCES:
patent: 3041442 (1962-06-01), Ullmann et al.
patent: 3087043 (1963-04-01), Hofer
patent: 3783224 (1974-01-01), Sehroeder
patent: 3795604 (1974-03-01), McKinney et al.
patent: 4197443 (1980-04-01), Sidenstick

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