高速研削における砥粒切削状態の解析的予測

概要

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Statistical distribution of the effective rake angle of abrasive grains is obtained by applying kinematically admissible velocity fields to a huge number of three-dimensional micro-cutting processes with abrasive grains which randomly differ in the normal rake angle, inclination angle and cutting edge angles. Based on this distribution, which has a peak around the effective rake angle of - 5 degree, thermo-elastic-plastic FEM analyses of orthogonal cutting processes are conducted for rake angle - 60 to 30 degrees. Other cutting conditions are also widely changed to investigate the influence of cutting speed, rake angle, undeformed chip thickness and tool material on grinding characteristics. Simulated results show a critical undeformed chip thickness under which chip forms with great difficulty. The critical value decreases as cutting speed or rake angle increases. This may result in better grinding performances and ground surface integrity in high or ultra-high speed grinding.
公益社団法人精密工学会の論文
2001-06-05