Abstract
Finite element simulation software Deform-3D on large-diameter multi-pass three-way pipe to simulate the extrusion process, the equivalent stress, equivalent strain and load were analyzed. The simulation results show that with the increase of processing pass, deformation process becomes complex, forming more difficult, the value of the state variables are increasing; in the extrusion process, the mold first contact with the billet and extruded convex hull area of the site, compared to other regions, plastic deformation, stress concentration and large, with the mold closed, the force to uniform .The results are well shown that it could provide a theoretical basis to the practical industrial production.
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