Design Of Equal Channel Angular Extrusion Equipment

With the development of science and technology in the world, the high performance nonferrous metal materials is more and more important for us. And the requirements for the nonferrous metal materials are getting higher and higher. Ultrafine-grained materials have excellent mechanical properties, unique physical properties and excellent properties. The research on ultrafine grained-materials has important scientific significance and high industrial value. Equal Channel Angular Pressing (ECAP) is one kind of severe plastic deformation method, which can refine grain size by introducing the simple shear deformation into the workpiece and has been proved to be an effective method for obtaining various bulk ultrafine-grained materials. Research on equal channel angular pressing equipment is very important.Considering the characteristics of ECAP and combining the demand of the actual situation, the equipment using typical three-beam and four-column structure, the horizontal layout, no-perforation system. The hydraulic transmission pump direct drive form will be the equipment’s driving mode. The composition and operation flow of the hydraulic system are described, and the basic scheme of the hydraulic system is given. For the orderliness of the punch’s extrusion load and the stress distribution of the mold, ECAP of long size deformable body is simulated by using Deform-3D software. It provides the basis for the optimization of ECAP deformation process of large size metal sample.The body structure and main components of the extrusion equipment were designed, and then the strength and stiffness of each component was calculated according to the traditional mechanical calculation method. On this basis, the specific size of each component of the extrusion equipment is determined. The finite element analysis results show that the stress distribution is not uniform, and phenomenon of stress concentration exists in local structure.The optimization analysis is carried out on the front-beam. In the whole process of optimization of the model, the thickness of the front-beam’s stiffened-plate is used as the design variables, front-beam’s mass is used as the objective function, front-beam’s maximum stress and maximum deformation are used as state variables. It is concluded that, the mass of the front-beam is decreased by 5.15% compared with the former model.