ドレッシングにおける砥粒切れ刃形成に及ぼす砥石結合度の影響

研削砥石のドレッシングに関する研究(第2報)

抄録

Since diamond dressing is basically a fracture process of the composite wheel material, the characteristics of this material itself and the dressing force may well have some vital influences on the dressing result. An investigation has been carried out to study the effects of dressing conditions and grinding wheel's inherent properties such as grade, on the generating mechanism of cutting edges. Size distributions for dressing particles were obtained and SEM observations of the dressed surfaces were made for C to P-grade wheels. The main results obtained are summarized as follows: (1) Small particles of the order of the dressing depth accounts for a considerable percentage, in number, of dressing particles which increases with a harder wheel and with finer dressing conditions. (2) The number of diamond's passages which a grain suffers before falling off increases with a harder wheel and with finer dressing conditions, and consequently this results in an increase in area of flat plateaux on abrasive grains. (3) The number of micro-cracks on dressed surfaces of abrasive grains increases with a harder wheel and with rougher dressing conditions.