Abstract
In face grinding by using a single grain even under the same conditions such as grinding speed or area of cut, the grinding force varies according to the degree of wear of the abrasive grain. In this report the aspect of wear and its progress of two kinds of single grains, diamond and sapphire, are described. The worn profile of a grain is idealized from that of a diamond single grain, and the half of the substantial apex angle based on the profile of cut groove is calculated from the area of cut and the depth of cut to represent the worn profile. It is taken as the parameter, and the dependency of the grinding force on the area of cut or the grinding speed is investigated, which answers the questions about the effect of wear of abrasive grains proposed in the previous report. Moreover the relation between the variation of grinding force and the change of flow in the workpiece brought about by the wear of grain is considered.
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