Residual stress field evaluation of the blank of a casing part

Casing parts are the key components of many mechanical products. In this study, a FEM simulation model of the extrusion process of a cylindrical casing is built to assess the residual stress field after extrusion. Then, a residual stress evaluation FEM model of the turning process is established. The FEM model is validated by the stress measurement experiments. Results show that large tensile residual stress is generated near the surface of the cylindrical blank in the extrusion process. After turning process, the compressive stresses are distributed near the inner wall of the conical blank in the tangential direction, and the tensile stresses are near the outer wall. By contraries, the compressive stresses in the axial direction are near the outer wall in the axial direction, and the tensile stresses are near the inner wall. (paper)