GRINDING WHEEL MANUFACTURING METHOD AND GRINDING WHEEL

摘要

A method of manufacturing a grinding wheel, and a grinding wheel. After a first overcoat layer is formed on each of CBN abrasive grains, a second overcoat layer that is plastically deformed under a pressure lower than a pressure under which the first overcoat layer is deformed, is formed on the outer side of the first overcoat layer to manufacture coated abrasive grains. The coated abrasive grains are subjected to pressure-molding to be formed into a prescribed shape under a pressure that is equal to or higher than a pressure under which the second overcoat layer is plastically deformed. The second overcoat layers are deformed and flow to form a molded material having a structure in which the first overcoat layers contact each other, and the flowing second overcoat layers are moved into clearances between the coated abrasive grains. By sintering this, CBN abrasive grains are dispersed at a prescribed distance that is determined by the degree of outer radius of each first overcoat layer, and vacancies are arranged therebetween at a prescribed density.

主权项

1. A grinding wheel manufacturing method comprising:
a coating of manufacturing coated abrasive grains by forming a first overcoat layer on an outer side of each of abrasive grains and then forming at least one outer overcoat layer that is deformed under a pressure lower than a pressure under which the first overcoat layer is deformed, on an outer side of the first overcoat layer; a pressure-molding of charging the coated abrasive grains into a prescribed shape and then manufacturing a molded material by applying a pressure equal to or higher than a pressure under which the outer overcoat layer is deformed; and a sintering of sintering the molded material.