Wire electric discharge machine

Details Wire electric discharge machine Wire electric discharge machine

2006-01-10

2006-01-10

Evans, Geoffrey S. (Department: 1725)

Electric heating

Metal heating

Cutting or disintegrating

Reexamination Certificate

active

06984800

ABSTRACT:
A wire electric discharge machine capable of adjusting spacing between a nozzle and a workpiece without manual operation and without causing damage to a machine and a workpiece. The wire electric discharge machine includes wire supply apparatus for supplying a wire electrode through the wire guide toward the workpiece; wire supply-amount measuring apparatus for measuring a supply amount of the wire electrode; wire front-end detecting apparatus for detecting a front end of the wire electrode being supplied by the wire supply apparatus at a wire front-end detecting position; and wire contact detecting apparatus for detecting contact of the front end of the wire electrode with an upper surface of the workpiece. A position of the upper surface of the workpiece is determined based on the wire front-end detecting position and a supply amount of the wire electrode measured by the supply amount measuring apparatus from when the front end of the workpiece is detected by the wire front-end detecting apparatus till the contact of the front end of the wire electrode with the upper surface of the workpiece is detected by the wire contact detecting apparatus.

REFERENCES:
patent: 4783583 (1988-11-01), Obara et al.
patent: 5055649 (1991-10-01), Iwasaki et al.
patent: 62-102920 (1987-05-01), None
patent: 4-41123 (1992-02-01), None
patent: 7-299660 (1995-11-01), None

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