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:
Aug. 27, 1991
Filed:
Mar. 16, 1990
Naoki Watanabe, Aichi, JP;
Mitsubishi Denki K.K., Tokyo, JP;
Abstract
A wire cut-type electric discharging method of machining a work for machining a portion having a predetermined taper wherein the portion to be machined comprises a first straight section, a second straight section extending in parallel to the first straight section and an arc-shaped section located between the first and second straight sections. A vector is derived representing a positional relationship among a number of corresponding positions on two machining tracks each comprising a first straight track, an arc-shaped track and a second straight track. The first straight tracks, the arc-shaped tracks and the second straight tracks are formed by allowing the portion to be machined to intersect the upper and lower surfaces of the work. A start point and an end point of the arc-shaped track constituting one of the machining tracks are determined by displacing a start point and an end point of the arc-shaped track constituting the other machining track by a magnitude of the vector. Thus, the other machining track is determined subsequent to the determination of the one machining track. The portion to be machined is machined by displacing a wire serving as an electrode along both the machining tracks.