Wire electric discharge machine and wire electric discharge...

Details Wire electric discharge machine and wire electric discharge... Wire electric discharge machine and wire electric discharge...

2007-05-01

2007-05-01

Evans, Geoffrey S. (Department: 1725)

Electric heating

Metal heating

Cutting or disintegrating

C219S069170

Reexamination Certificate

active

11272143

ABSTRACT:
A wire electric discharge machine and a wire electric discharge machining method in which a workpiece set posture is compensated for an error. After a workpiece is set and fixed on a workpiece table, an upper guide measures three or more three-dimensional positions that are not situated on one straight line on an upper surface of the workpiece, utilizing detection of contact with the upper surface. A unit normal vector is obtained, and a shift amount for shift from an originally set vertical position to a corrected position is calculated. In machining, the shift amount is added to the position to compensate for an angle error of a machined surface, and a deviation of a machined point position caused by inclination of the workpiece is collaterally compensated for. Thus, the machined shape cannot be distorted, and the workpiece set posture error can be compensated for.

REFERENCES:
patent: 5519181 (1996-05-01), Hsu
patent: 6984800 (2006-01-01), Abe et al.
patent: 63-196324 (1988-08-01), None
patent: 63-225109 (1988-09-01), None
patent: 3-89523 (1991-04-01), None
patent: 6-320340 (1994-11-01), None
patent: 7-52000 (1995-02-01), None
patent: 2667475 (1997-10-01), None

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