研削加工層の残留応力に関する研究 : 微視的残留せん断応力を考慮した解析

概要

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In a ground layer, the distribution of residual strains measured by X-ray is depend upon the grinding direction. The distribution. is owing to a microscopic residual shear stress τ_<ZXW> produced by the unidirectional machining. This report describes the results of an experimental analysis considered the stress τ_<ZXW> in the ground layer. The results obtained are as follows. The normal residual stresses σ_<XV> and σ_<YV> shift to the tensile stress side with increasing wheel depth of cut, work speed and peripheral wheel speed. The stress τ_<ZXW> increases with increasing work speed and the wheel depth of cut and decreases with increasing peripheral wheel speed. The depth of penetration of τ_<ZXW> in the workpiece agrees with the depth where σ_<XV> and σ_<YV> are the largest in the tensile stress side. It became clear that the depth of mechanical action by abrasive grains is shallower than the one of thermal action. The increase in additive sulfur content in grinding fluid results in decrease in the tangential grinding force F_t, the ratio F_t/F_n, the stress σ_<XV>, σ_<YV> and τ_<ZXW>.
公益社団法人精密工学会の論文
1984-09-05