研削加工における砥石の熱変形速度の研究

Abstract

The thermal deformation rate of wheel has been measured by using air-micrometer in process of cylindrical wet plunge grinding. By taking the thermal deformations rate of wheel and workpiece into account, the size generation process is experimentally analyzed. Main conclusions are as follows : (1) When using resinoid wheel which contains aluminium powder in bond materials, the thermal deformation rate of wheel rapidly increases and shows sharp peak in spark-in state, becomes zero in steady state and then rapidly decreases in spark-out state. (2) In spark-in state the actual size generation rate increases abruptly and exceeds the effective plunge speed because the thermal deformations rate of wheel and workpiece increase rapidly, and in spark-out state the actual size generation decreases more rapidly than the observed size generation rate. (3) In the case of the grinding heat strikingly generates, the processes of size generation, grinding forces, grinding temperature of wheel and workpiece and residual stock depend on the relative infeed rate, which is regarded with the thermal deformations rate of wheel and workpiece.