Method and apparatus for discharge machining

Details Method and apparatus for discharge machining Method and apparatus for discharge machining

1981-09-04

1984-02-14

Paschall, M. H.

Electric heating

Metal heating

Cutting or disintegrating

219 69M, B23P 108

Patent

active

044318979

ABSTRACT:
Discharge machining for machining a workpiece in a tapered configuration by applying electric current to the workpiece and the machining electrode, and moving the electrode relative to the workpiece in a main machining direction and also in a direction substantially perpendicular thereto. The electrode is initially advanced relative to the workpiece in the main machining direction to a predetermined position or depth. The electrode is then moved relative to the workpiece in a direction perpendicular to the main machining direction while retracting the electrode. When the machining gap is lowered, the electrode is moved toward the center of the circulating locus of the electrode, and thus a shortcircuit between the electrode and the workpiece can be prevented.

REFERENCES:
patent: 3767886 (1973-10-01), Sennowitz
patent: 3825713 (1974-07-01), Bell, Jr.
patent: 4135070 (1979-01-01), Pfau et al.
patent: 4310742 (1982-01-01), Pfau
patent: 4365300 (1982-12-01), Johanson et al.

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