The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 2008
Filed:
Sep. 21, 2006
Keiichiro Miyajima, Yamanashi, JP;
Yasuo Arakawa, Yamanashi, JP;
Keiichiro Miyajima, Yamanashi, JP;
Yasuo Arakawa, Yamanashi, JP;
Fanuc Ltd, Yamanashi, JP;
Abstract
A wire electric discharge machine capable of taper machining with an improved accuracy. A reference wire correction amount d set in advance is determined to be a proper value for a wire-diameter correction amount for a speed control plane, and adjustment amounts for adjusting the reference wire correction amount for the upper and lower surfaces of a workpiece are determined to be proportional to (1-Lu/Lm) and (1-Ll/Lm), respectively, where Lu, Lm and Ll are machining distances at the upper surface, speed control plane and lower surface, respectively. As a proportionality coefficient, a reference adjustment amount e is set in advance. Using adjustment amounts e(1-Lu/Lm) and e(1-Ll/Lm), wire-diameter correction amounts for the workpiece upper and lower surfaces are determined to be d+e(1-Lu/Lm) and d+e(1-Ll/Lm). When a workpiece setting table and upper and lower wire guides are driven, axes are controlled so that a wire electrode follows, on the workpiece upper and lower surfaces, paths shifted by the wire-diameter amounts, respectively.