Grinding wheel manufacturing method
AssigneesTokyo Shibaura Denki Kabushiki Kaisha, Osaka Kongo Seito Co., Ltd.
InventorsMasahiro Hashimoto, Hideo Tani
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Abstract
A grinding wheel comprising abrasive grains each of which is coated with a conductive material and a non-conductive binder interposed among said abrasive grains. The amount of said conductive material ranges from 30 to 80% by weight based on said abrasive grains. The abrasive grains coated with said conductive material is contained in said grindstone in an amount ranging from 33 to 64% by volume. A method of producing said grinding wheel is also proposed. The method comprises preparing a mixture of said coated abrasive grains and said non-conductive binder, filling the mixture into a mold and molding said mixture by applying a pressure while maintaining said mixture at a constant temperature.
Claims3
A method of manufacturing a grindstone which comprises the steps of:
- (a) coating each of a plurality of abrasive grains with a conductive material in an amount ranging in total from 30 to 80% by weight based on said abrasive grains,
- (b) homogeneously mixing the resultant coated abrasive grains with a non-conductive binder so as to contain said coated abrasive grains with a non-conductive binder so as to contain said coated abrasive grains in an amount ranging from 40 to 64% by volume and sufficient to effect electrical conductivity throughout the grindstone,
- (c) filling the mixture of said coated abrasive grains with said non-conductive binder into a mold,
- (d) molding said mixture by discontinuously applying a pressure a plurality of times while maintaining the temperature of said mixture by heating said mixture in a range in which said binder is softened so as to discharge gasses therein.
Dependencies are inferred from the claim text.