Simulation Analysis of Aluminum Circular Tube in a Two-Stage Porthole Dies Extrusion Process

Abstract:

The single stage porthole die extrusion was largely applied in our research and industrial production. Two stage porthole die for a hollow aluminum tube, which added a pre-porthole die in front of the conventional porthole die, could slow down the metal deformation rate and control the metal flow uniformity. We performed a simulation of hollow aluminum extrusion in single stage porthole die and two stage porthole die. Through a series of numerical simulation based on Forge software, the advantage of two-stage porthole die extrusion, such as the surface quality of extruded profile, extrusion force, welding quality and die stress, was studied. The results showed that the pressure of welding and required extrusion force decreased and the surface quality of the extruded profile would be improved. Thus, we could prolong the work life of mandrel root by the means of this method.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 1305-1311
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.1305
• Online since: June 2017
• Authors: Ning Xu*, Dong Nan Huang, Zhao Xin Du, You Lai Li
• Keywords: Extrusion, Forge Numerical Simulation, Metal Flow Behavior, Two-Stage Porthole Die

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