Toyo Advanced Technologies Co., Ltd.

Jun Ohya

Masaru Fukuman

Tatsumi Hamasaki

Toshimitsu Iwai

Hiroyuki Yoshimura

Shoji Imakurusu

A wire saw apparatusexecutes cut-machining by pressing a workpiece W against a cutting wirespirally wound around multiple wire guides, while running the cutting wireand simultaneously swinging the wire guidesas well as the cutting wire. The wire saw apparatusincludes a controllercontrolling a position of a workpiece holderfor holding the workpiece W. The position is controlled depending on a swing angle of the cutting wireso that machined portion of the workpiece W is shaped into an arc.

Wire saw apparatus and cut-machining method

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.

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Hiroshima, Japan

Jun Ohya