Method of and apparatus for electrical discharge machining

Details Method of and apparatus for electrical discharge machining Method of and apparatus for electrical discharge machining

1976-07-06

1978-06-20

Reynolds, Bruce A.

Electric heating

Metal heating

Cutting or disintegrating

219 69M, B23P 108

Patent

active

040963713

ABSTRACT:
A method and tool electrode apparatus for electrical discharge machining. The tool electrode is a segmental electrode having an arcuate periphery in which is provided at least one undercut serration, as a conical undercut serration, around the arcuate periphery thereof. The tool electrode has a portion removed, which portion may take various shapes, so as to provide a longitudinal cutting face having a longitudinal cross section shape commensurate with the cross section shape of a cavity to be cut in a workpiece. The method includes placing the segmental tool electrode with its longitudinal cutting face in an operative position adjacent a workpiece, and then providing relative rotation between the tool electrode and the workpiece to move the tool electrode into and through the workpiece to cut a cavity into the workpiece which has a longitudinal cross section with undercut serrations that is the same as the longitudinal cross section shape of the tool electrode cutting face.

REFERENCES:
patent: 2902584 (1959-09-01), Ullmann
patent: 3622734 (1971-11-01), Mainwaring

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