Abstract
Uneven distribution of the residual stress is the main factor causing the distortion of a workpiece. Different clamping scheme may cause different clamping stress. Clamping stress coupling with the residual stress inside the part induces different stress distribution, which affects components’ machining distortion and service life. To reflect the relationship between clamps and residual stress , finite element model with different clamping schemes were bulit and the clamping process was simulated. And the chip removal effect was taken into account using a material removal approach based on element death technique. Stress distribution in the workpiece is analyzed and compared under different clamping conditions. It is verified that clamping position has a significant effect on the residual stress. Otherwise the clamping sequence has a little effect on the stress redistribution.
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