POROUS SUPERABRASIVE GRAIN METAL BOND GRINDING WHEEL SUPERIOR IN CUTTING PROPERTY, AND MANUFACTURE OF THE SAME

摘要

PROBLEM TO BE SOLVED: To give the spontaneous blade generating action and to make the discharge of the ground chips easy, by forming an abrasive grain layer obtained by binding the super-abrasive grain with a metal bond phase through a vitreous coating layer composed of crystalline glass or non-crystal line glass. ;SOLUTION: The cubic boron nitride or diamond is selected as the super-abrasive grain, to be mixed with the fine powder of the vitreous particles, then the aqueous solution of PVA as a binder, is added thereto to obtain the slurry, and the vitreous powder particles are attached to the surface of the abrasive grain, dried and fixed to be used as the vitreous coated abrasive grain. Then the obtained particles and the fine powder of an alloy are mixed and stirred, the PVA aqueous solution as the binder is added thereto, and dried to obtain the double coated abrasive grain, and the double coated abrasive grain is filled in a die for molding, then pressed, molded and sintered at a specific temperature in a specific atmosphere. Thereby the abrasive grain and the pores are finely and uniformly distributed in a metal bond layer, to make the discharge of the ground chips easy, and the high cutting property can be kept by the spontaneous blade generating action.;COPYRIGHT: (C)1998,JPO