シェービング加工における切り口面生成過程のFEM解析

概要

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Machined surface generation process in shaving, which is one of fine blanking process, was analyzed by using elastic-plastic finite element method in this paper. We employed two material fracture criteria. When the node in front of die edge comes close 2 μm to die edge, we assume that the node is separated to two nodes. And the ductile fracture criterion depends on equivalent strain and hydrostatic pressure is applied as a second criterion. As the result of analysis assuming a brass as the work material, the deformation process shows the same way as that of cutting process from the initial stage to the middle stage. In the end stage the deformation area moves from the line connecting the die edge and the chip free surface to the line connecting the die and the punch edges. Then deformation concentrates on that region. There remains small strain under 1.0 on the initial to middle stage where cutting like deformation is observed.
2001-02-25