Wire cutting device of wire electric discharge machine

Details Wire cutting device of wire electric discharge machine Wire cutting device of wire electric discharge machine

2005-12-27

2005-12-27

Evans, Geoffrey S. (Department: 1725)

Electric heating

Metal heating

Cutting or disintegrating

Reexamination Certificate

active

06979794

ABSTRACT:
When starting a wire cutting operation, a first predetermined current is supplied from a power unit to a wire, and at the same time predetermined tension is applied from a tension applying device to the wire. When a first predetermined time elapses since the start of the wire cutting operation, the current supplied from the power unit is switched to a second predetermined current which is smaller than the first predetermined current, and also the predetermined tension is continuously applied, such that the wire is cut.

REFERENCES:
patent: 4618761 (1986-10-01), Inoue et al.
patent: 4929810 (1990-05-01), Kawase
patent: 2-53528 (1990-02-01), None
patent: 2-237724 (1990-09-01), None
patent: 4-331022 (1992-11-01), None
patent: 5-220624 (1993-08-01), None
patent: 5-285736 (1993-11-01), None
patent: 5-305522 (1993-11-01), None

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