The optimization of warm-cold extrusion technology for bell-type housing

Forming process scheme of bell-type housing with a combination of cold and warm extrusion was analyzed and carried out according to extrusion theory.The forming process and the optimizing technology of spherical housing were studied based on the combine method of numerical simulation and experiment research.Directing to the non-fulfilling defect during the initial trial production process,the methods of partitioning shifting and split-flow were elected to improve the process scheme.The optimized process scheme is warm backward extrusion(cone punch) and sizing(die with hole D60).Verification shows that the distribution of flow line of metal is logical,and the microstructure of material is eligible.