US Patent No. 9,541,914

WIRE ELECTRIC DISCHARGE MACHINE AND CALCULATION METHOD FOR WIRE SUPPORT POSITIONS OF WIRE ELECTRIC DISCHARGE MACHINE


Patent No. 9,541,914
Issue Date January 10, 2017
Title Wire Electric Discharge Machine And Calculation Method For Wire Support Positions Of Wire Electric Discharge Machine
Inventorship Ryou Nishikawa, Yamanashi (JP)
Shouji Takahashi, Yamanashi (JP)
Assignee FANUC CORPORATION, Yamanashi (JP)

Claim of US Patent No. 9,541,914

1. A wire electric discharge machine that performs machining by moving a wire electrode stretched between an upper wire guide
and a lower wire guide relative to a table on which a workpiece is placed, the wire electric discharge machine comprising:
a wire guide moving means for slanting the wire electrode at a predetermined angle;
a contact detector disposed on the upper wire guide;
a means for calculating a taper angle of a tapered section of a tapered workpiece mounted on the table, based on positions
obtained through measurement, by the contact detector, of two points at arbitrary heights on the tapered section; and

a means for calculating wire support positions of the upper wire guide and the lower wire guide that give a target taper angle
and a target shape dimension, based on a position of any one of the two points measured, the calculated taper angle, the upper
surface position of the workpiece obtained through measurement by the contact detector, and a position at which the tapered
section and the upper surface of the workpiece intersect when there is no machining error.