Abstract
Extruded aluminum shapes have been used for constructive components of the automotives in order to reduce the total weight of ones in the last several years. This paper describes a new manufacturing method of the bumper inner with curvature, knowledge of conform extrusion for the condenser tubes and a new extrusion procedure with shear strain. In experiment of shear extrusion, tensile strength and elongation of products are better than those of the ingot made material. On the conform extrusion, the result of numerical simulation based on upper bound theorem shows the extrusion condition of minimum total energy. And bending of bumper inner is calculated by FEM. It is clear-that bending process is influenced by the geometry of cross section.
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