锻压技术

基于计算机辅助实验的铝合金发动机罩外板成形工艺参数优化

英文标题：Forming parameters optimization for aluminum-alloy hood outer based on computer aided test

作者：傅建刘挺彭必友叶义根赵娅

单位：西华大学

分类号：TG389

出版年,卷(期):页码：2014,39(2):31-36

摘要：

铝合金覆盖件冲压成形遇到的常见质量问题是起皱、破裂和回弹。利用计算机辅助实验（CAT）技术研究工艺参数和板坯形状对某汽车发动机罩外板成形质量的影响，找出满足质量评价指标要求的最优工艺水平组合。结果表明：实验方案中所有工艺水平组合均能很好地控制制件的起皱和破裂；一个板厚的凸凹模间隙有利于改善制件的贴膜性；采用矩形板坯可降低制件局部的最大减薄率和削弱其切边后的回弹；压边力和拉深筋高度对定量评价指标的影响不显著，但适当提高压边力和增加拉深筋高度可在一定程度上减小制件的回弹量。在压边力300 kN、凸凹模间隙0.8 mm、拉深筋高度14 mm、矩形板坯（虚拟）拉深速度3000 mm·s-1条件下，能够获得满足质量评价指标要求的发动机罩外板制件。

The common quality problems are wrinkle, fracture and spring-back in stamping Al-alloy auto-body panels. Based on computer aided test, the effect of technological parameters and blank shapes on forming quality of an Al-alloy hood outer was studied, and a group of optimizing parameter levers to meet the demand of quality evaluation index were determined. The results show that all level combinations in the experiment plan can well control wrinkle and fracture when forming the panel. The punch-die gap of one blank thickness is propitious to improve the fit-ability between panel and die. The rectangle blank used in forming may reduce the local maximum thinning when forming panel and the spring-back after trimming.The effect of draw-bead height and blank hold force on quantized evaluation indicators is not remarkable, but apropos increasing the blank holder force and the drawbead height will reduce the panel spring-back within a certain degree. The hood outer to meet the demand of quality evaluation index can be produced under the conditions of blank hold force 300 kN, punch-die gap 0.8 mm, draw-bead height 14 mm, (virtual) drawing speed of rectangle blank 3000 mm·s-1.

基金项目：

四川省教育厅重点项目（11ZA282）;西华大学“流体及动力机械”省部共建教育部重点实验室学术成果培育项目（SBZDPY-11-16）

傅建（1955-），男，硕士，教授

参考文献：

［1］Jinta M, Sakai Y, Horie S, et al. Press forming development of aluminum auto-body panel for electric vehicle[J]. Technical Notes/JSAE Review,2001, (22): 81-94.
［2］马鸣图,游江海,路洪洲,等.铝合金汽车板性能极其应用[J]. 中国工程科学,2010,12(9): 4-20,33.Ma Mingtu, You Jianghai, Lu Hongzhou, et al. Research progress of aluminium alloy automotive sheet and application technology [J]. Engineering Science, 2010, 12(9): 4-20,33.
［3］Miller W S, Zhuang L, Bottema J, et al. Recent development in aluminum alloys for the automotive industry [J]. Materials Science and Engineering A, 2000, 280(1): 37-49.
［4］Jinta M, Sakai Y, Oyagi M, et al. Press forming analysis of aluminum auto body penal: wrinkle behavior in 5000 and 6000 series aluminum alloy sheet forming [J]. Technical Notes/JSAE Review, 2000,(21): 385-416.
［5］Mahabunphachai S, Koc M. Investigations on forming of aluminum 5052 and 6061 sheet alloys at warm temperatures [J]. Materials and Design, 2010, 31: 2422-2434.
［6］Zhang Wenfeng, Shivpuri R. Probabilistic design of aluminum sheet drawing for reduced risk of wrinkling and fracture [J]. Reliability Engineering and System Safety, 2009, 94: 152- 161.
［7］Herron J C, Hodgson P D, Cardew-hall M J. Defining the operating window for an automotive sheet pressing operation [J]. Journal of Materials Processing Technology, 1998, 80-81: 68-75.
［8］Park K, Kim Y. The effect of material and process variables on the stamping formability of sheet materials [J]. Journal of Materials Processing Technology, 1995, 51:64-78.
［9］Kayabasi O, Ekici B. Automated design methodology for automo-bile side panel die using an effective optimization approach [J]. Materials and Design, 2007, 28: 2665-2672.
［10］Sun Guangyong, Li Guangyao, Gong Zhihui, et al. Multiobjective robust optimization method for drawbead design in sheet metal forming [J]. Materials and Design, 2010, 31: 1917-1929.
［11］Lee S W, Yang D Y. An assessment of numerical parameters influencing springback in explicit finite element analysis of sheet metal forming process [J]. Journal of Materials Processing Technology, 1998, 80-81:60-67.
［12］吴华英,王永信,肖春辉,等.轿车门内板成形工艺参数敏感性分析[J].锻压技术,2012,37(2)：38-41.Wu Huaying, Wang Yongxin, Xiao Chunhui, et al. Sensitivity analysis of forming process parameters for car door inner pane[J]. Forging & Stamping Technology, 2012, 37(2): 38-41.
［13］NUMISHEET 2005 BENCHMARK 1. Springback prediction of decklid inner panel [A]. 6th International Conference and Workshop on Numerical Simulation of 3D Sheet Forming Processes[C]. USA: Detroit, 2005.
［14］Holmberg S, Nejabat B. Numerical assessment of stiffness and dent properties of automotive exterior panels[J]. Materials and Design, 2004, 25: 361-368.
［15］崔令江. 汽车覆盖件成形技术[M]. 北京: 机械工业出版社, 2003. Cui Lingjiang. Automobile Covering Panel Forming Technology [M]. Beijing: China Machine Press,2003.
［16］赵亦希,于忠奇.汽车用铝合金板拉伸性能与成形能力的相关性[J].材料科学与工艺，2007，15（1）：98-101.Zhao Yixi, Yu Zhongqi. Correlation between uniaxial tension properties and formability of automotive aluminium alloy sheet [J]. Materials Science and Technology, 2007, 15(1)：98-101.

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