光弾性皮膜法によるアルミニウム被削材端面近傍のひずみ挙動解析

概要

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The behavior of the cutting strain measured by a photoelastic method is described. An aluminum workpiece (JIS-1070) of 3 [mm] thickness coated with birefringe material of 100-100-8 epoxy rubber was observed in orthogonal cutting. High-speed steel (SKH-4) of 30° rake angle was used under the dry condition. In addition, the elastic finite-element method was applied. The boundary condition at the base of the workpiece was given by the strain measured in the cutting experiment. The shape of the distribution of maximum shearing stress in computation is in a good agreement with the instantaneous isochromatics. The results obtained are as follows. (1) The residual strain distribution in the workpiece between the free edge is divided into three zones, i. e. , the transitional, steady and final increasing regions. (2) The free surface edge has no effect on the initial phenomenon which is observed transitionally at the entrance of a cut up to equilibrium condition, but affects the strain distribution in the final region at the end of a cut. (3) The strain distribution produced when the tool is leaving a cut implies the generation of the burr, failure of the cutting edge and deformation of the workpiece. The strain at the final increasing region is reduced by the corner chamfering.
社団法人日本機械学会の論文
1995-04-25