锻压技术

矩形盒件拉深成形规律及失效分析

英文标题：Analysis on deep drawing forming regularity and failure of rectangular box parts

作者：陈渝胡志力严勇刘双喜苏永成黄叶萍

分类号：TG386

出版年,卷(期):页码：2015,40(8):52-58

摘要：

矩形盒件在拉深成形过程中易出现起皱、拉裂等形式的失效，严重制约着成形件的使用性能。基于Dynaform进行了三维动态仿真，分析了毛坯形状、压边间隙等因素对其成形极限及壁厚分布的影响，预测了坯料成形过程中失效的产生，并结合实际进行了验证。结果表明：相同尺寸的坯料，采用圆形切弓形坯料比圆形坯料更有利于获得成形效果较好的盒形件；随着压边间隙的增大，成形盒形件的拉裂趋势有所减缓，但失稳起皱趋势越来越严重，当压边间隙从1.2t增大到1.4t时，壁厚的最大减薄率从87.79%减小到33.48%，成形件的拉裂趋势得到有效缓解；实际的拉深试验验证了有限元仿真分析的有效性。

In the process of deep drawing forming for rectangular box parts, failures such as wrinkling and crack are easy to occur, which seriously affect the performance of forming parts. Three-dimensional dynamic simulation was conducted by Dynaform，and influences of factors such as the blank shape and the blank holder gap etc. on the forming limit and wall thickness layout were analyzed，from which the failure of production during forming process was predicted and verified. The results show that with the same size of the blank, it obtains a better forming result of box-shaped part by the circular cutting bow-shaped blank than by the circular blank. By enlarging the blank holder gap, the crack trend of forming box-shaped parts gets smaller, but the possibility instability wrinkling increases. When the blank holder gap increases from 1.2t to 1.4t, the maximum wall thickness reduction ratio decreases from 87.79% to 33.48%, therefore the crack trend of forming part is effectively eased. Finally, the effectiveness of finite element simulation analysis is verified in the drawing tests.

基金项目：

江麓机电集团有限公司科研项目：铝合金薄板零件深成形工艺研究（江机研发字【2014】）

陈渝（1965-），女，学士，高级工程师

参考文献：

［1］李奇涵.冲压成形工艺与模具设计[M].北京：科学出版社，2007.Li Q H.Stamping Forming Technology and Die Design[M].Beijing：Beijing Science Press，2007.
［2］洪慎章，曾振鹏.高正方形盒形件拉深工艺及模具设计[J].模具制造，2002，2(1)： 11-14.Hong S Z ，Zeng Z P.Deep drawing forming technology and die design of depth square box parts [J].Die Manufacturing，2002，2 (1)：11-14
［3］何海燕，贺亮，万一军.毛坯形状对盒形件拉深的影响研究[J].模具工程，2009，(1)：70-72.He H Y，He L，Wan Y J. Research on influence of blank shape to box-shaped parts deep drawing [J]. Die Engineering，2009，(1)：70-72.
［4］袁玉红.盒形零件拉深成形缺陷的模拟研究与分析[D].贵阳：贵州大学，2009.Yuan Y H.Simulation Research and Analysis of Deep Drawing Forming Defects of Box-shaped Parts [D].Guiyang: Guizhou University，2009.
［5］黄国权，郝美刚.基于压边力控制方盒形件拉深成形的数值模拟[J].机床与液压，2012，40 (13)：62-66.Huang G Q，Hao M G. Numerical simulation of the deep drawing forming controlled square box parts based on blank holder force[J].Machine Tool and Hydraulic，2012，40 (13)：62-66.
［6］张贵宝，陈军，肖华，等.两种压边方式下板料拉深成形性能及载荷分析[J].上海交通大学学报，2008，42 (1)： 51-56.Zhang G B，Chen J，Xiao H，et al.Sheet metal deep drawing forming performance and load analysis under two modes of blank holder [J]. Journal of Shanghai Jiaotong University， 2008，42 (1)：51-56.
［7］王晓伟.基于变间隙压边的板料拉深成形及数字模拟研究[D].长春：吉林大学，2013.Wang X W.Sheet Metal Deep Drawing Forming and Digital Simulation Research based on Variable Gap Blank Holder [D].Changchun：Jilin University，2013.
［8］陈炜，周宏超，徐雪来，等.盒形件变压边力拉深成形研究[J].锻压技术，2014，39 (11)：20-23.Chen W， Zhou H C，Xu X L，et al. Research on variable blank holder force in deep drawing for rectangular box parts[J].Forging & Stamping Technology， 2014，39 (11)：20-23.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】