锻压技术

车门内板拉延开裂分析与讨论

英文标题：Analysis and discussion on cracking in drawing for automobile door inner panel

作者：吕浩刘涛王秋雨张赛娟

分类号：TG386

出版年,卷(期):页码：2022,47(2):88-93

摘要：

以某车型前车门内板为研究对象，为解决零件在拉延工序出现的开裂和暗裂缺陷，首先对模具及零件生产现状进行分析，针对成形缺陷提出添加刺破刀的改善方案；然后，利用有限元仿真模拟对刺破刀形状和刺破高度进行多组合对比，得到了最优的刺破刀方案：压边力为1200 kN、刺破刀形状为D形、刺破高度为15 mm；最后，通过冲压实验验证了添加刺破刀的效果。冲压实验方案的破口宽度与仿真计算结果存在一定误差，这是因为冲压实验存在二次成形过程，材料在二次成形过程中的回复和软化对冲压实验结果有较大影响。这种冲压方法可以作为破口宽度趋势性分析的依据，但无法精确量化分析。

For the front door inner panel of a certain type of automobile, in order to solve the crack and dark crack defects of parts in the drawing process, firstly, the production status of die and parts was briefly analyzed, and according to the forming defects, the improvement plan of adding piecrcing knife was put forward. Then, the shape of piercing knife and the piercing height were compared in multiple combinations by finite element simulation, and the optimal piecrcing knife scheme was obtained as the blank holder force of 1200 kN, the piercing kinfe shape of D-type and the piercing height of 15 mm. Finally, the effect of adding piercing knife was verified by stamping test. And there was a certain error of the break width results between the stamping test scheme and the simulation calculation. It is because that there is secondary forming process in stamping test,the recovery and softening of the material in the secondary forming process have a great impact on the stamping test results. This stamping method could be used as the basis for the trend analysis of break width, but it could not be accurately quantitative analysis.

基金项目：

作者简介：吕浩（1986-），男，学士，工程师,E-mail：popeye911@163.com

参考文献：

[1]罗江红，张艳彬. 某汽车车门内板拉延成形刺破工艺刀具结构参数优化[J]. 热加工工艺，2020，49(9)：95-99.

Luo J H, Zhang Y B. Optimization of tool structural parameters of lancing process in drawing forming of an automobile inner door [J].Hot Working Technology, 2020，49(9)：95-99.

[2]安治国，刘志禄，韦光珍.基于数值模拟技术的轿车零件成形工艺优化设计[J]. 热加工工艺，2008，37(23)：58-60.

An Z G, Liu Z L, Wei G Z. Optimization design of auto part forming process based on numerical simulation [J]. Hot Working Technology, 2008,37(23)：58-60.

[3]吴磊．背门内板窗框开裂与改善[J]. 模具工业，2014,40(3):63-66．

Wu L．Crack problem and improvement of automobile lift door inner panel window frame[J]．Die ＆ Mould Industry,2014,40(3):63-66．

[4]叶鹏飞，王成勇，陈锦洪，等．基于数值模拟分析异形工艺孔在汽车门内板塑性成形过程中的应用研究[J]．塑性工程学报，2019，26 ( 1): 33-39．

Ye P F,Wang C Y,Chen J H,et al. Application research on irregular holes in plastic forming of door inner panel for car based on numerical simulation[J]. Journal of Plasticity Engineering,2019,26(1):33-39.

[5]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．

[6]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.

[7]王辉，刘莉滋，王海宝. 差厚板汽车覆盖件的拉延成形工艺参数优化[J].锻压技术，2020，45(5)：75-80.

Wang H,Liu L Z,Wang H B. Optimization on drawing process parameters for differential thickness blank of automobile cover parts[J]. Forging & Stamping Technology, 2020，45(5)：75-80.

[8]王成勇，项志伟，叶鹏飞，等. 预冲孔与中途刺破对抑制车门内板关键区域成形缺陷影响的对比研究[J]. 塑性工程学报,2020,27(6):13-22.

Wang C Y,Xiang Z W, Ye P F，et al. Comparative study on effect of pre-punching and mid-course piercing on inhibiting forming defects in key areas of inner plate of car door[J]. Journal of Plasticity Engineering, 2020,27(6):13-22.

[9]曹彪，代建文.汽车顶盖表面凹陷问题的控制方法[J].模具工业,2020,46(9):66-69.

Cao B,Dai J W. Control measures for surface indentation issue on automobile roof panel[J]. Die & Mould Industry, 2020,46(9):66-69.

[10]柳玉起．计算机模拟在金属成形行业的应用和发展现状[J]. 锻造与冲压,2005,(6):16-22.

Liu Y Q. Application and situation of computer simulation in metalforming industry[J]. Forging & Metalforming, 2005, (6):16-22.

[11]谢邵辉,柳玉起,杜亭.冲压成形模拟过程中的工艺切口算法及应用[J].中国机械工程,2006,(6):31-36.

Xie S H, Liu Y Q,Du T. Algorithm for open cutting and its applications in the numerical simulation of sheet metal stamping [J]. China Mechanical Engineering, 2006,(6):31-36.

[12]李奇涵.冲压成型工艺与模具设计[M]. 第3版.北京：科学出版社，2007.

Li Q H. Stamping Forming Technology and Die Design [M].The 3rd Edition.Beijing:Science Press, 2007.

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