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

B - Operations, Transporting

23

H

327/29

B23H 9/00 (2006.01)

Patent

CA 1065412

A B S T R A C T A method and tool electrode apparatus for electrical dis- charge 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 var- ious shapes, so as to provide a longitudinal cutting face having a longi- tudinal 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 be- tween 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.

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