锻压技术

差厚板汽车覆盖件的拉延成形工艺参数优化

英文标题：Optimization on drawing process parameters for differential thickness blank of automobile cover parts

作者：王辉刘莉滋王海宝

单位：重庆三峡学院重庆市轻合金材料与加工工程技术研究中心智能制造先导技术重庆市高校工程研究中心

分类号：TG386.1

出版年,卷(期):页码：2020,45(5):75-80

摘要：

以某汽车差厚板前门内板件作为研究对象，为解决其拉延成形过程中的破裂和起皱缺陷，首先对差厚板材料的力学性能进行测试，可知相同材质的厚板和薄板具有相似的力学性能，拼焊板的屈服强度和抗拉强度比母材高。根据零件的特点设计工艺补充面，借助有限元软件AutoForm建立差厚板拉延成形的有限元模型。通过初步分析，针对成形缺陷提出引入工艺切口。然后，采用正交试验设计、数值模拟和多目标优化相结合的方法，对拉延成形的压边力、刺破刀C1、C2的凸出高度和摩擦系数进行了优化，得到最优的工艺参数组合为：压边力为1.1×106 N、刺破刀C1的凸出高度为12 mm、刺破刀C2的凸出高度为8 mm、摩擦系数为0.125。最后，采用优化的参数进行试验验证，得到拉延成形的差厚板零件和数值模拟结果基本吻合。

For an automobile front door inner panel of differential thickness blank, in order to solve the crack and wrinkle defects in the drawing process, firstly, the mechanical properties of differential thickness blank were tested, the similar mechanical properties of thick blank and thin blank with the same material were obtained, and the yield strength and the tensile strength of tailor welded blank were higher than that of base material. Then, according to the characteristics of parts, the addendum surface was designed, and the finite element model of drawing for differential thickness blank was established by finite element software AutoForm. Through the preliminary analysis, the process incision was introduced to solve the forming defects, and the blank-holder force of drawing, the protruding height of piercing knives C1 and C2 and the friction coefficient were optimized by the method combinated the orthogonal experiment design, the numerical simulation and the multi-objective optimization. Furthermore, the optimum combination of process parameters is the blank-holder force of 1.1×106 N, the protruding height of 12 mm for the piercing knife C1, the protruding height of 8 mm for the piercing knife C2 and the friction coefficient of 0.125. Finally, the optimized parameters were verified in the experiments. The results show that the experimental results of differential thickness blank obtained by drawing and the numerical simulation results are basically consistent.

基金项目：

重庆市教委科学技术研究项目（KJQN201801228）；重庆市自然科学基金资助项目(cstc2019jcyj-msxmX0505)

王辉(1989-)，男，博士，讲师，E-mail：wanghui@sanxiau.edu.cn

参考文献：

[1]王利刚, 李军,李彤光.我国乘用车轻量化进展与发展思考[J].汽车工艺与材料,2017,(9):56-60.
Wang L G, Li J, Li T G. Thoughts on the progress and development of passenger car lightweight in China[J]. Automobile Technology & Material, 2017, (9):56-60.
[2]黄林, 陈馨. 激光拼焊板在天窗加强框上的应用[J]. 锻压技术，2018,43(6):28-31.
Huang L，Chen X. Application of laser tailorwelded blanks for sunroof strengthening frame [J]. Forging & Stamping Technology，2018,43(6):28-31.
[3]韦春华, 吴丰顺,陶武,等.不等厚DP600与IF钢激光拼焊工艺和接头组织性能[J]. 华中科技大学学报: 自然科学版, 2014, 42(7):128-132.
Wei C H, Wu F S, Tao W, et al. Joint microstructure performance and laser tailor welded blanks of DP600 and IF steels with dissimilar thickness[J]. Journal of Huazhong University of Science and Technology: Nature Science Edition, 2014, 42(7):128-132.
[4]王艳青, 李军,陈云霞.TRB差厚板在汽车前纵梁上的应用[J].汽车工艺与材料,2013,(6):10-13.
Wang Y Q, Li J, Chen Y X. Application of TRB differential plate on front longitudinal beam of automobile[J]. Automobile Technology & Material,2013,(6):10-13.
[5]张华伟, 王新刚,陈小辉, 等.轧制差厚板横向弯曲工艺参数研究[J].东北大学学报: 自然科学版,2019,40(5):728-733.
Zhang H W, Wang X G, Chen X H, et al. Study on process parameters in transverse bending of tailor rolled blanks[J].Journal of Northeastern University: Natural Science, 2019,40(5):728-733.
[6]Xu F, Sun G, Li G, et al. Experimental investigation on high strength steel (HSS) tailorwelded blanks (TWBs) [J]. Journal of Materials Processing Technology, 2014, 214(4): 925-935.
[7]王光, 李双一,魏元生.不等厚板在车顶横梁上的应用[J].汽车零部件,2017,(3):33-36.
Wang G, Li S Y, Wei Y S. Application of tailor rolled blanks on roof cross beam[J]. Automobile Parts,2017,(3):33-36.
[8]Wang H, Zhou J, Zhao T S, et al. Multipleiteration springback compensation of tailor welded blanks during stamping forming process [J]. Materials & Design, 2016, 102:247-254.
[9]刘晓晶, 刘朋会,秦海斌,等. 基于FEA的拼焊板轿车中立柱拉延成形[J].中南大学学报:自然科学版, 2012, 43(8): 2973-2978.
Liu X J, Liu P H, Qin H B, et al. Drawing process of tailor welded blank car center pillar based on FEA[J]. Journal of Central South University: Nature Science Edition, 2012, 43(8): 2973-2978.
[10]张华伟, 官英平,刘相华,等.轧制差厚板方盒形件拉深成形起皱缺陷影响因素[J].钢铁研究学报,2018, 30(1):48-53.
Zhang H W, Guan Y P, Liu X H, et al. Influencing factors of wrinkle defects of tailor rolled blank for square box in drawing process[J]. Journal of Iron and Steel Research, 2018, 30(1): 48-53.
[11]朱茂桃, 朱彩帆,郭佳欢,等.基于6σ稳健性的轧制差厚板车门优化设计[J].中国机械工程,2017, 28(8):996-1001.
Zhu M T, Zhu C F, Guo J H, et al. Optimization design of TRB car doors based on 6σ robustness[J]. China Mechanical Engineering, 2017,28(8):996-1001.
[12]Bandyopadhyay K, Panda S K, Saha P, et al. Limiting drawing ratio and deep drawing behavior of dual phase steel tailor welded blanks: FE simulation and experimental validation[J]. Journal of Materials Processing Technology, 2015, 217:48-64.

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