Effect of die approach geometry and bearing length on residual stress after bar drawing

摘要

The effect of die approach geometry on axial residual stress after bar drawing was investigated by the experiment and FEM analysis. The entrance of the die should use angle-type and the corner radius is enlarged comparatively in the exit. The axial surface residual stress is also changed by the bearing length. As a result, a new design of the optimum geometry of die is proposed.