ELECTRO-DISCHARGE MACHINING ELECTRODE AND METHOD OF FORMING

摘要

An electrode having 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 is useful for producing cone-shaped diffusion opening in a rotor blade of a jet engine. The hole and the diffusion openings are formed with a single electrode in one operation. A method of forming such an electrode comprises forming one or more teeth each comprising a straight forward section (6) and a triangular shaped head section (8) into a substantially circular cross-section and coining the triangular head section (8) into a cone-like section.