Porous metal-bonded grinding wheel and a method of manufacturing the same

摘要

PURPOSE:To sharply improve the cooling effect of a grinding wheel and to perform polishing in a half-dry state by containing grinding liquid and cutting oil in blow holes by dispersing porous potassium silicate particles in the abrasive grain layer of a porous metal bond grinding wheel. CONSTITUTION:A porous metal bond grinding wheel is formed such that porous potassium silicate particles 3 are uniformly dispersed in a metal coupling phase 1 togetherwith superabrasive grains 2. In the so formed porous metal bond potassium silicate grinding wheel, a number of blow holes are formed in the porous potassium silicate particles 3 dispersed in an abrasive grain layer, besides since a ratio in which the internal blow holes 3 in the identical particle 3 are intercommunicated is high, grinding liquid in the blow hole is sucked through a capillary action wherein the blow hole makes contact with the grinding liquid, and the cooling effect of a grinding stone is sharply improved. By previously immersing the abrasive grain layer in the grinding liquid and cutting oil and containing the liquid and oil in the blow hole, grinding in a half-dry state is practicable.