Apparatus for machining a workpiece using wire discharge...

Details Apparatus for machining a workpiece using wire discharge... Apparatus for machining a workpiece using wire discharge...

2011-04-19

2011-04-19

Evans, Geoffrey S (Department: 3742)

Electric heating

Metal heating

Cutting or disintegrating

C219S069130

Reexamination Certificate

active

07928337

ABSTRACT:
A wire-discharge machining apparatus controls a short circuit between a wire electrode and a workpiece and wire-breakage, and makes it easy to improve productivity, by performing power supply control to mix an upper-side power supply state in which a high-frequency pulse voltage is applied from an upper-side power supplying unit, a lower-side power supply state in which the high-frequency pulse voltage is applied from a lower-side power supplying unit, and a both-sides power supply state in which the high-frequency pulse voltage is applied to the wire electrode from both power supplying units in synchronization with each other during a period of electric discharge machining.

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