被削材温度分布の残留応力に及ぼす影響の理論的解析

切削中の被削材内部の温度分布について (第2報)

抄録

Paying a special attention to the residual stresses by thermal stresses out of the others in machining, the effect of the temperature distribution in the workpiece as the thermal stresses on the residual stresses in the machined surface was investigated. As cutting temperature distributions for calculation of thermal stresses, experimentally measured distributions and theoretically calculated ones were used. Stress analysis was conducted by using the finite element method. The following results are obtained.
1) Residual stress by thermal stress is tensile in the machined surface layer, on the contracy, in the inner layer it is small compressive.
2) At higher cutting speed residual stresses are produced mainly by thermal effect, and the higher cutting speed, the larger tensile residual stress in the machined surface layer.