Abstract
The purpose of this paper is to investigate the metal removal mechanism of coated abrasive belts considering the wear of active grains. For this purpose, following assumptions are applied. (1) The new grain cutting edge is a conical shape and the worn one is the shape of a truncated cone. (2) Grinding force F is resolved into the normal grinding force FN and the tangential grinding force FT. FN is composed of FNC (cutting component of FN) which is the sum of normal forces acting upon rake faces of grain cutting edges and FNS (sliding component of FN) which is the sum of normal forces acting upon worn grain flats. Similarly, FT is composed of FTC and FTS. Under the above assumptions the relation among the percent wear flat area, grinding force and rate of stock removal is theoretically developed. By experiments, C (value of FTC/ FNC), KS (specific grinding force), e (exponent of the size effect), pm (average contact force intensity between wear flats of abrasive grains and workpiece) and μ (coefficient of friction between wear flats of abrasive grains and workpiece) are obtained and discussed. As the result, the metal removal mechanism of coated abrasive belts is considerably made clear.
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