Electrical discharge machine with secondary electrode for corros

Details Electrical discharge machine with secondary electrode for corros Electrical discharge machine with secondary electrode for corros

1993-02-04

1995-06-06

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

219 6912, B23H 102

Patent

active

054224551

ABSTRACT:
An electric discharge machining apparatus of the travelling wire or sink type includes at least one secondary electrode which is immersed in the dielectric at least during machining. A microvoltage power supply is used to create a micropotential difference between the workpiece and the secondary electrode so that the workpiece becomes a negative pole. Maintaining this arrangement both during machining and non-machining times prevents the workpiece from being subjected to positive-pole oxidation.

REFERENCES:
patent: 4678884 (1987-07-01), Obara et al.

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