Numerical Simulation Of Extrusion Engineering Of Aluminum Alloy Profile

Our country has rich ore resources. The aluminum profiles have the comprehensive performance that other ordinary metal have not, it has been widely used in many fields, such as aerospace and communication, construction, petroleum, electric power, chemical industry,etc.All the fields have great demand. In recent years, The extrusion processing plays a important role in producing aluminum profile, Extrusion die structures and process parameters determine product quality. So some industry focus on choosing the extrusion process parameters and extending the service life of extrusion die.The paper research on the hollow aluminum profile. Firstly, extrusion process and design principle of the porthole die is proposed, and it describes the structure of the die. The principles of the finite element and the control equation are introduced. and then different models used to simulate with different parameters are made. The steady state simulation on the extrusion process models established is presented. At last, The effect of the structure on the die and extrusion process parameters on the extrusion process are studied by the method of Orthogonal and Taguchi, the best structure of the die and the most reasonable extrusion process parameters are obtained, which are used for many enterprises reliably, The following main conclusions in the paper are proposed:(1) The distribution law of the temperature, the speed and the deformation on the aluminum profile section, the ram force of the extrusion process are obtained by studying numerical simulation of the aluminum pothole. The above physical phenomena are explained in detail.(2) Numerical simulation models of hollow aluminum profile extrusion are established on the basis of Hyperxtrude software. The effects on extrusion of extrusion die structures(welded chamber depth, channel bridge width, work zone length) are invested, the indicators(the flow on the profile cross section,mold deformation, ram force)of extrusion are selected to measure the profile quality. The result show that the best die structure is that the depth of welded chamber is 22 mm, the width of channel bridge is 25 mm, the length of the work zone benchmark is 7.5 mm.(3) The effects of extrusion process impacted by the extrusion process parameters(the extrusion speed, extrusion temperature and deformation degree) are studied, the results show that for the index parameters of velocity distribution on profile cross section, the optimumparameters of the extrusion is that the billet diameter is 205 mm, the extrusion speed is 3.2mm/s, the preheat temperature of the billet is 480 ℃, the preheat temperature of extrusion die is 470 ℃, the preheat temperature of the container 440 ℃. For the index parameters of the ram force, the billet diameter is 200 mm, the extrusion speed is 1.4mm/s; the preheat temperature of the billet is 490 ℃, the preheat temperature of extrusion die is 480 ℃, the preheat temperature of the container 460 ℃.(4) The effect of software Hyperxtrude on the extrusion process rule was proved correctly, comparing proximate product with software Hyperxtrude simulation and actual extrusion.