GRANULATED ABRASIVE FOR CUTTING WHEEL AND GRINDING WHEEL, ITS MANUFACTURE, AND GRINDSTONE MADE BY USING SAME

摘要

PURPOSE:To manufacture the title granulated abrasive which has excellent cutting quality and life, by mixing abrasive grains whose surface has been moistened with an adhesive liquid with a specified powder capable of sintering, granulating this mixture, and drying it. CONSTITUTION:Abrasive grains 1 (A) (e.g., diamond) having a particle diameter of 0.03-2mm is mixed with an adhesive liquid (B) (e.g., a paraffinic organic solvent) to moisten the surface of component A uniformly with component B. Component A thus moistened is mixed with a powdery granulating bond 2 (C) (e.g., Co) which has a particle diameter smaller than that of component A and is capable of sintering, and the obtained mixture is granulated and dried. Then, the uniform moistening thereof with component B and the mixing with component C for granulation are repeated to regulate the particle size of the granule, thus giving an abrasive for a cutting wheel and a grinding wheel. This abrasive is mixed with a matrix bond 3 having a hardness lower than that of component C, and the obtained mixture is formed and burned, thus giving a grindstone having a double-structured bond constitution.