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:
Mar. 31, 2015
Filed:
Feb. 08, 2010
Jun Ohya, Hiroshima, JP;
Tatsumi Hamasaki, Hiroshima, JP;
Hiroyuki Yoshimura, Hiroshima, JP;
Masaru Fukuman, Hiroshima, JP;
Jun Ohya, Hiroshima, JP;
Tatsumi Hamasaki, Hiroshima, JP;
Hiroyuki Yoshimura, Hiroshima, JP;
Masaru Fukuman, Hiroshima, JP;
Toyo Advanced Technologies Co., Ltd., Hiroshima, JP;
Abstract
The present invention provides a method of cutting a workpiece efficiently with high accuracy by utilizing tension adjusters to approximate tension in a wire in a wire saw to a predetermined target tension while effectively reducing only tension in a winder-side wire. The method comprises a forward-driven cutting step of cutting a workpiece while moving a wire forward, a first switching step of reversing a driving direction of the wire, a backward-driven cutting step of cutting the workpiece while moving the wire backward, and a second switching step of reversing a driving direction of the wire and returning to the forward-driven cutting step, the steps being repeated in this order. In both switching steps, only tension in a winder-side wire is reduced by tension manipulators. A reduction in target wire tension therefor is performed after completion of deceleration of the wire in each switching step.