Ehwa Diamond Ind. Co., Ltd.

Jung Su Han

So Young Yun

A grinding wheel with tips which can be uniformly abraded regardless of the position of the tips is disclosed. In the wheel, the inside and outside tips may be formed by bonding diamond dust of the same concentration with resinoid or metal bonds of lower and higher abrasion resistances, respectively. Alternatively, the inside and outside tips may be formed using the same resinoid or metal bond. In this case, the outside tips are laden with diamond dust, while the inside tips are laden with no diamond dust or cheap abrasive. As a further alternative, the concentration of the diamond dust of the tips may be stepwisely reduced from the outside toward the inside. In addition, the top surface of each tip may be inclined downward from the outside toward the inside to compensate for the eccentric abrasion of the tips due to the circumferential speed difference between the inside and outside tips.

Grinding wheel having abrasive tips

A wire saw comprising a wire rope 120, a plurality of abrasive sleeves 110 each including a cylindrical mount 112 and an abrasive metal layer 114, an elastic material layer 130 of resin surrounding the wire rope 120 between the abrasive sleeves 110 and between each of the abrasive sleeves 110 and the wire rope 120, and a clamping pipe 140 for making the wire saw be endless to form a loop. The abrasive sleeves 110 surround the wire rope and are spaced at predetermined intervals longitudinally of the wire rope. The cylindrical mount 112 includes a pair of annular grooves formed on outer opposite ends thereof and a pair of through-holes diagonally formed thereon. The elastic material layer 130 includes a plurality of annular grooves 132 spaced at predetermined intervals and formed by means of a shape of a mold 200, thereby providing a straightness for the wire rope regardless of an injection pressure of resin injected into the mold 200. The clamping pipe 140 comprises a center protrusion 142, end compressed depressions 144 and a cutting layer 146 covering the whole outer surface thereof in order to have a similar outer shape to that of the wire saw. The cutting layer 146 has diamond or carborundum particles which are dispersed thereon by means of electro deposition or hard facing.

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Paldal-ku, South Korea

Jung Su Han