| In this article, big vertex angle copper cone was studied. The influence of the blanks with different sizes on the metal flowing and the properties of the final formed components during the deforming process were studied with the method of numerical simulation, and the effect of the possible different eccentric loads on the metal flowing and the forming quality of the final components during the producing process were also studied. Then the reasonable forming process route of the components of this kind was proposed and the mold was designed in order to provide a better guidance for the production.At first, the proper heating temperature and extrusion speed of blank were made according to the geometrical feature of big vertex angle copper cone and it's materials feature. The high-speed extrusion at the temperature 525℃was confirmed to be good for improving the grain refining degree and the production efficiency. Then the mold design was made on this basis to provide precondition for the production and three-dimensional simulation.And then , being the foundation of former numerical simulation, the rigid-plastic finite element model of the dies and billets which would be used in practical procession has been built at first, and the mesh of billets, the material parameters, the definition of interface condition between die and work pieces, forming velocity have been defined either.The extrusion process of the big vertex angle copper cone was dimensionally simulated with the method of numerical simulation of finite element method (FEM). The effect of the blank size and eccentric loads on the equivalent stress and equivalent strain in the forming process were discussed and then reasonable parameters were determined. The simulating results showed that the components that satisfied the needs could be obtained under the following the conditions: the blank diameter wasΦ220mm, the distortion temperature was 525℃and eccentric load was no more than 0.3mm.
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