Wire electric discharge machine having function for counting num

Details Wire electric discharge machine having function for counting num Wire electric discharge machine having function for counting num

1993-04-12

1994-01-04

Evans, Geoffrey S.

Electric heating

Metal heating

Cutting or disintegrating

B23H 704

Patent

active

052763013

ABSTRACT:
In a wire electric discharge machine, a permissible discharge frequency is calculated on the basis of an average discharge frequency per unit time which is estimated on the basis of a target inter-electrode voltage or a detected average inter-electrode voltage and a discharge period. The number of times a discharge is actually induced between a wire electrode and a workpiece every unit time is counted and the application of a pulse-shaped voltage is ceased for a residual time of the unit time by a control device when the discharge frequency exceeds the permissible discharge frequency.

REFERENCES:
patent: 3623148 (1971-11-01), Berghausen
patent: 4673789 (1987-06-01), Ozaki et al.
patent: 4695696 (1987-09-01), Ozaki et al.
patent: 4703144 (1987-10-01), Goto et al.

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