Method for the prevention of arcing in a spark erosion process

Details Method for the prevention of arcing in a spark erosion process Method for the prevention of arcing in a spark erosion process

1983-07-21

1985-08-13

Paschall, M. H.

Electric heating

Metal heating

Cutting or disintegrating

219 69P, 219 69S, B23P 108

Patent

active

045352178

ABSTRACT:
A method for the prevention of arcing in a spark erosion process, in which a pulse-shaped voltage is applied across an electrode and a workpiece, which voltage has a first predetermined value during a variable ignition retarding period determined by the process parameters, and on the termination of this ignition retarding period a discharge takes place between the electrode and the workpiece, resulting in the flow of a pulse-shaped current and in the voltage dropping in absolute sense to a second value determined by the process. The method comprises the additional steps of determining whether the voltage pulse satisfies a predetermined criterion and discontinuing voltage pulses failing to satisfy this criterion.

REFERENCES:
patent: 3705287 (1972-12-01), Saito et al.
patent: 3812317 (1974-05-01), De Bont et al.
patent: 3916138 (1975-10-01), Pfau
patent: 3999028 (1976-12-01), Saito et al.

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