Electrical discharge machining electrode

Details Electrical discharge machining electrode Electrical discharge machining electrode

1987-12-11

1989-08-08

Pellinen, A. D.

Electric heating

Metal heating

Cutting or disintegrating

B23H 914, B23H 104

Patent

active

048555576

ABSTRACT:
An electrode for forming a hole in a metal part by an electrical discharge machining process, the electrode being provided with a longitudinal flushing bore which extends from the free end of the electrode in the direction of the electrode longitudinal axis and is spaced laterally from the longitudinal axis, at least at the free end, such that electrode material is present on the longitudinal axis at the free end. When a hole is tapped in a metal part by this electrode, the electrode rotates so that no core, or slug, is left in the tapped hole at the end of the machining operation.

REFERENCES:
patent: 2422994 (1947-06-01), Taylor
patent: 2715172 (1955-08-01), Larkins Jr.
patent: 2773968 (1956-12-01), Martellotti et al.
patent: 3194938 (1965-07-01), Smith
patent: 3622734 (1971-11-01), Mainwaring
patent: 3727023 (1973-04-01), Monnich
patent: 4059031 (1977-11-01), Erdelyi
patent: 4628171 (1986-12-01), Colby et al.

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