Transactions of Materials and Heat Treatment

Title：Analysis on transient extrusion process of hollow aluminum profile based on finite element method

Authors： Lu Shuai1 Wang Yongxiao2 Lou Shumei2 Su Chunjian2

Unit： 1.Shandong YANCON Light Alloy Co. Ltd. 2.Shandong University of Science and Technology

KeyWords： extrusion portholes die non-steady simulation FEM die optimization

ClassificationCode：

year,vol(issue):pagenumber：2015,40(10):130-138

Abstract：

The non-steady extrusion process from the dividing, welding stages to steady extrusion for an upside beam on the train with unsymmetrical cross-sectional profile was numerically simulated by FEM (finite element method). The distribution and variation of the velocity, temperature and strain rate for the deformation material were researched during the whole non-steady extrusion process. The die stress distribution were analyzed too. For the issue of severe deformation of extrusion head in the whole extrusion process simulation，the optimizations for the second chamber structure sizes, baffle-block height and bearing length were performed. As a result the outlet velocity uniformity was improved obviously. The velocity difference between the maximum and the minimum reduces from 22 mm·s-1 to 7 mm·s-1. After analyzing the distribution relationship between effective strain rate and temperature，it is found that the quantity of heat needed for blank temperature rising is mainly derived from the energy of plastic deformation generated by blank deformation. The stress distribution of die in each stage of extrusion is obtained by die stress analysis.

Funds：

国家自然科学基金资助项目（51305241）；山东省自然科学基金资助项目（ZR2014JL040）

路帅（1982-），男，硕士，工程师

Reference：

[1[Staley J T, Liu J, Hunt Jr W H. Aluminum alloys for aerostructures[J]. Advanced Materials and Processes, 1997, 152(4):10-17.

[2]谢建新, 刘静安. 金属挤压理论与技术[M]. 北京：冶金工业出版社, 2001.

Xie J X, Liu J A. Theory and Technology of Metals Extrusion[M]. Beijing: Metallurgical Industry Press, 2001.

[3]Jun L, Yang J G, Yan D J, et al. Rotating extrusion technique and its effect on quality of aluminum alloy thin-plate weldments[J]. Transactions of Nonferrous Metals Society of China, 2010, 20(2): 183-188.

[4]程磊, 谢水生, 黄国杰, 等. 分流组合模挤压过程的有限元分步模拟[J]. 系统仿真学报, 2008, 20(24): 6603-6606.

Cheng L, Xie S S, Huang G J, et al. Multi-stage finite element simulation of porthole die extrusion process[J]. Journal of System Simulation, 2008, 20(24): 6603-6606.

[5]秦升学, 邢国良, 娄淑梅, 等. 基于 DEFORM-3D 的空心铝型材挤压过程有限元分析[J]. 热加工工艺, 2013, 42(5)：81-83.

Qin S X, Xing G L, Lou S M, et al. Finite element analysis on extrusion process of hollow aluminum profile based on DEFORM-3D[J]. Hot Working Technology, 2013, 42(5)：81-83.

[6]Lee J M, Kim B M, Kang C G. Effects of chamber shapes of porthole die on elastic deformation and extrusion process in condenser tube extrusion[J]. Materials & Design, 2005, 26(4): 327-336.

[7]林高用, 冯迪, 刘健, 等. 铝合金方管分流焊合挤压过程的有限元分析[J]. 中国机械工程, 2009, 20(24): 2993-2998.

Lin G Y, Feng D, Liu J, et al. FE Analysi s of the extrusion and welding process in porthole die for an aluminum alloy square tube[J]. China Mechanical Engineering, 2009, 20(24): 2993-2998.

[8]Zhao H E, Wang H, Wang M, et al. Simulation of extrusion process of complicated aluminium profile and die trial[J]. Transactions of Nonferrous Metals Society of China, 2012, 22(7): 1732-1737.

[9]He Y F, Xie S S, Cheng L, et al. FEM simulation of aluminum extrusion process in porthole die with pockets[J]. Transactions of Nonferrous Metals Society of China, 2010, 20(6): 1067-1071.

[10]邸利青, 张士宏. 分流组合模挤压过程数值模拟及模具优化设计[J]. 塑性工程学报, 2009, 16(2): 123-127.

Di L Q, Zhang S H. Porthole die extrusion process numerical simulation and optimal die design[J]. Journal of Plasticity Engineering, 2009, 16(2): 123-127.

[11]Fang G, Zhou J, Duszczyk J. Effect of pocket design on metal flow through single-bearing extrusion dies to produce a thin-walled aluminium profile[J]. Journal of Materials Processing Technology, 2008, 199(1): 91-101.

[12]吴向红, 赵国群, 孙胜, 等. 挤压速度和摩擦状态对铝型材挤压过程的影响[J]. 塑性工程学报, 2007, 14(1): 36-41.

Wu X H, Zhao G Q, Sun S, et al. The influence of extrusion speed and frictional status on aluminum profile extrusion processes[J]. Journal of Plasticity Engineering, 2007, 14(1): 36-41.

[13]徐永礼, 庞祖高, 唐夏翔. 基于 Deform-3D 的异型铝型材挤压模具开裂失效分析与参数优化[J]. 锻压技术, 2014, 39(4): 97-103.

Xu Y L, Pang Z G, Tang X X. Cracking failure analysis and parameter optimization of special-shaped aluminum profile extrusion die base on Deform-3D[J]. Forging ＆ Stamping Technology, 2014, 39(4): 97-103.

[14]赵斌斌, 汤宏群, 湛永钟, 等. 半空心铝型材挤压过程数值模拟与工艺参数优化[J]. 锻压技术, 2014, 39(9): 131-136.

Zhao B B, Tang H Q, Zhan Y Z, et al. Numerical simulation of the extrusion process and optimization of the technological parameters for half-hollow aluminum profile[J]. Forging ＆ Stamping Technology, 2014, 39(9): 131-136.

[15]Liu P, Xie S S, Cheng L. Die structure optimization for a large, multi-cavity aluminum profile using numerical simulation and experiments[J]. Materials & Design, 2012, 36: 152-160.

[16]Chen H, Zhao G Q, Zhang C S, et al. Numerical simulation of extrusion process and die structure optimization for a complex aluminum multicavity wallboard of high-speed train[J]. Materials and Manufacturing Processes, 2011, 26(12): 1530-1538.

[17]Chen L, Zhao G Q, Yu J Q, et al. Analysis and porthole die design for a multi-hole extrusion process of a hollow, thin-walled aluminum profile[J]. The International Journal of Advanced Manufacturing Technology, 2014,74(1):1-10.

[18]谢建新, 黄东男, 李静媛, 等. 一种空心型材分流模挤压焊合过程数值模拟技术: 中国,ZL20091008960.7[P].2009-12-16.

Xie J X, Huang D N, Li J Y, et al. A simulation technology for solving welding problem during porthole die extrusion process： China: ZL20091008960.7[P]. 2009-12-16.

[19]黄东男, 李静媛, 张志豪, 等. 方形管分流模双孔挤压过程中金属的流动行为[J]. 中国有色金属学报, 2010, 20(3): 487-495.

Huang D N, Li J Y, Zhang Z H, et al. Metal flowing behaviors during diplopore extrusion of square tube with porthole die[J]. The Chinese Journal of Nonferrous Metals, 2010, 20(3): 487-495.

[20]Sellars C M, Tegart W J M G. Hot workability[J]. International Metallurgical Reviews, 1972, 17(1): 1-24.

[21]Lou S M, Zhao G Q, Wang R, et al. Numerical simulation of steady and unsteady aluminum profile extrusion processes using finite volume method[J]. Engineering Computations, 2008, 25(6): 589-605.

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