石材研削におけるダイヤモンド砥粒の破砕性

概要

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The edge fracture of diamond grains plays an important role in cutting of stone, concrete and refractories. In this paper the edge fracture characteristics of two kinds of diamond grains were evaluted on the basis of facture onset coefficients and edge shape transition probabilities, which were obtained by a single-grain grinding test. These probabilities enabled us to calculate the edge shape distribution of these diamond grains in stone grinding processes. The results obtained are summaraized as follows : (1) Since the diamond grinding grains used have small fracture onset probability and large probability transition to sharp edges, their grain edges meintain sharpness by fracture for a long time during grinding. (2) The stationary edge shape distribution of MBS 760 contains 28 percent more sharp edges than that of MBS. Consequently MBS 760 grains, which have ideal fracture characteristics, are suitable for grinding hard stones.
一般社団法人日本機械学会の論文
1994-09-25