Nippei Toyama Corporation

Palace Chemical Co., Ltd.

Takashi Kambe

Kazuo Tanaka

Shigeo Kobayashi

Yukihiro Kanemichi

Akio Kawakita

Kensho Miyata

Eiichi Ibe

Yasuhiro Itou

In a wire saw, it is an object to reduce the variance in width of cut slices of a work as well as the degree of coarseness of the cut slices. A plurality of machining rollers 13 and 14 are arranged in parallel at prescribed intervals, and a large number of circular grooves 13a and 14a are formed on the outer periphery of each of the rollers. In an axial direction of the machining rollers 13 and 14, a plurality of supply reels 23, take-up reels 24 and wires 15A, 15B are arranged. The wires 15A, 15B supplied from the supply reels 23 are wound on the circular grooves 13a ad 14a of the plurality of machining rollers 13 and 14 so that they are travelled between the plurality of rollers 13 and 14, and taken up by the take-up reels 24. The work 20 is cut/sliced by a lapping operation of abrasive grains contained in the slurry which are supplied on the respective sets of wires 15A and 15B which travel between the plurality of machining rollers 13 and 14 in a longitudinal direction over respective halves of the rollers.

Wire saw and work slicing method

An aqueous working liquid composition for a wire saw comprising the following components (A) to (E): (A) 10 to 60% by weight of at least one selected from the group consisting of polyglycol ethers represented by the following formulae (I) and (II): ##STR1## wherein R.sub.1 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or a phenyl group; R.sub.2 represents a hydrogen atom or an acetyl group; and n represents an integer of 1 to 4; (B) 0.1 to 5.0% by weight of at least one selected from the group consisting of organic bentonite and inorganic bentonite; (C) 0.01 to 5.0% by weight of at least one selected from the group consisting of carboxymethyl cellulose (CMC), MgO, methanol, and ethanol; (D) 0.1 to 2.0% by weight of at least one selected from the group consisting of a sodium .beta.-naphthalenesulfonate-formalin condensate and a sodium, potassium, lithium or amine salt of petroleum or synthetic sulfonic acid; and (E) 10 to 70% by weight of water, each based on the total composition weight.

Aqueous working liquid composition for wire saw

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Kanagawa, Japan

Takashi Kambe