锻压技术

轿车覆盖件表面畸变的影响因素及规律研究

英文标题：Study on influence factors and regularity of surface distortion for automobile exterior panels

作者：邓璐璐林建平侯勇贺亮王燕

分类号：TG386

出版年,卷(期):页码：2018,43(8):58-64

摘要：

以前盖舷窗为原型，提取其特征结构，设计出尖角形台阶面的型面特征，通过对尖角形台阶面结构特征件进行冲压试验与成形仿真分析，验证了该仿真模型的准确性，并基于准确的仿真模型研究了常见的材料参数以及工艺参数对表面畸变的影响规律，并针对实际生产工艺中容易更改的几个参数设计了正交试验，分析了压边力、冲压速度、摩擦系数、板厚及拉延筋等因素对表面畸变的影响程度。结果表明，参数对表面畸变的影响程度从大到小依次为：板厚、拉延筋、冲压速度、压边力、摩擦系数。因此，在汽车外覆盖件实际生产中，可以从材料选取以及工艺优化角度考虑，实现面畸变的控制。

The characteristic structure was extracted from the front cover porthole, and the profile feature of sharp corner step surface was designed. Then, the stamping test and forming simulation analysis of structural parts with sharp corner step surface were carried out, and the accuracy of the simulation model was validated. Furthermore, based on the accurate simulation model, the influences of common material parameters and process parameters on surface distortion were studied, and the orthogonal tests were designed for several parameters, which were easy to be changed in the actual production process. Finally, the influences of blank holder force, stamping speed, friction coefficient, plate thickness and drawbead on the surface distortion were analyzed. The results show that the influence degree of the above parameters on the surface distortion from large to small is plate thickness, drawbead, stamping speed, blank holder force and friction coefficient. Thus, during the actual production of automobile exterior panels, the surface distortion can be controlled from the aspects of material selection and process optimization.

基金项目：

邓璐璐（1995-），女，硕士研究生，E-mail: 18939727262@163.com；通讯作者：林建平（1958-），男，博士，教授，博士生导师，E-mail:jplin58@tongji.edu.cn

参考文献：

1］Hu P, Bao J, Zhao K. Low/distortion on exterior surface of auto body and its correction method
［J］. Chinese Journal of Mechanical Engineering, 2012, 25(2):299-305.

［2］Shen H, Li S, Chen G. Quantitative analysis of surface deflections in the automobile exterior panel based on a curvature-deviation method
［J］. Journal of Materials Processing Technology, 2012, 212(7):1548-1556.

［3］ Liu L, Sawada T, Sakamoto M. Evaluation of the surface deflections in pressed automobile panels by an optical reflection method
［J］. Journal of Materials Processing Technology, 2000, 103(2):280-287.

［4］李淑慧, 沈洪庆, 倪啸枫,等. 车身覆盖件冲压成形面畸变缺陷形成机理研究
［J］. 机械工程学报, 2013, 49(6):153-159.

Li S H, Shen H Q, Ni X F, et al. Study on the forming mechanism of distortion defect in stamping surface of car exterior panel
［J］. Journal of Mechanical Engineering, 2013, 49(6):153-159.

［5］孙振忠, 杨玉英. 柱面扁壳面畸变形成机理及控制
［J］. 机械工程学报, 2005, 41(5):210-214.

Sun Z Z, Yang Y Y. Formation mechanism and control of cylindrical flat shell surface distortion
［J］. Journal of Mechanical Engineering, 2005, 41(5):210-214.

［6］刘瑞同, 林建平, 田浩彬. 轿车覆盖件表面瘪塘的分类及其特点
［J］. 精密成形工程, 2004, 22(2):52-54.

Liu R T, Lin J P, Tian H B. Classification and characteristics of a shriveled pond on the surface of a car′s cover
［J］. Precision Forming Engineering, 2004, 22(2):52-54.

［7］周驰, 周旭辉, 张赛军,等. 车门成形后凹陷成因分析和应对措施
［J］. 模具工业, 2011, 37(12):18-20.

Zhou C, Zhou X H, Zhang S J, et al. Analysis of the causes of the depression after the forming of the door and the countermeasures
［J］. Mould Industry, 2011, 37(12):18-20.

［8］任志国, 孙振忠. 汽车发动机罩板冲压成形及回弹过程的数值模拟
［J］. 哈尔滨理工大学学报, 2006, 11(1):135-138.

Ren Z G, Sun Z Z. Numerical simulation of stamping forming and springback of automobile engine hood plate
［J］. Journal of Harbin University of Science and Technology, 2006, 11(1):135-138.

［9］孙振忠, 陈盛贵. 覆盖件面畸变缺陷形成机理研究
［J］. 机械科学与技术, 2011, 30(12):2160-2164.

Sun Z Z, Chen S G. Research on the formation mechanism of surface distortion defects
［J］. Mechanical Science and Technology, 2011, 30(12):2160-2164.

［10］ Park C D, Chung W J, Kim B M. A numerical and experimental study of surface deflections in automobile exterior panels
［J］. Journal of Materials Processing Technology, 2007, 187:99-102.

［11］苏飞宇, 阳学, 乔晓勇,等. 基于仿真的汽车天窗圆角面畸变影响因素研究
［J］. 模具技术, 2015，(6):7-12.

Su F Y, Yang X, Qiao X Y, et al. Research on influence factors of corner surface distortion of car skylight based on simulation
［J］. Mould Technology, 2015，(6):7-12.

［12］ Thuillier S, Port A L, Manach P. Surface defects in sheet metal forming: A simulative laboratory device and comparison with FE analysis
［J］. AIP Conference Proceedings, 2011，1383（1）:839-846.

［13］武永甫. 汽车外覆盖件冲压表面畸变预测与模面补偿研究
［J］. 锻压技术, 2014, 39(12):101-105.

Wu Y F. Research on surface distortion prediction and surface compensation of automobile outer panel stamping
［J］. Forging & Stamping Technology, 2014, 39(12):101-105.

［14］朱传敏, 安强, 梅雨,等. 一种基于可视化的面畸变程度评价新方法
［J］. 塑性工程学报, 2017, 24(1):207-211.

Zhu C M, An Q, Mei Y, et al. A new method for evaluating the degree of surface distortion based on visualization
［J］. Journal of Plasticity Engineering, 2017, 24(1):207-211.

［15］黄强, 程培元, 张福芳,等. 摩擦系数对尾灯外座板冲压成形的影响
［J］. 装备制造技术, 2010,(4):20-21.

Huang Q, Cheng P Y, Zhang F F, et al. Influence of friction coefficient on stamping forming of outer seat plate of taillight
［J］. Equipment Manufacturing Technology, 2010,(4):20-21.

［16］胡世光, 陈鹤峥. 板料冷压成形的工程解析
［M］. 北京：北京航空航天大学出版社, 2004.

Hu S G, Chen H Z. Engineering Analysis of Sheet Metal Cold Pressing
［M］. Beijing：Beijing University of Aeronautics and Astronautics Press, 2004.

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