锻压技术

球形件多钳式柔性拉形的数值模拟

英文标题：Numerical simulation of multiple grippers flexible stretch forming for spherical part

作者：陈雪李明哲付文智冯朋晓

分类号：TG386.3

出版年,卷(期):页码：2010,35(4):32-36

摘要：

多钳式拉形是一种新型的板材柔性拉形工艺。采用有限元软件建立了球形件拉形的有限元模型，探讨了不同工艺方式和工艺参数对工件拉形质量的影响。结果表明：多钳式拉形有助于板材贴模，拉形件的应变分布均匀，可以提高拉形质量。板材与模具之间的摩擦系数越小，板厚减薄量越小；缩短过渡区，可以避免起皱缺陷，提高材料利用率。通过实验验证了数值模拟结果，模拟结果对多钳式拉形设备的优化设计以及实际板材的塑性加工具有指导价值。

Multiple grippers stretch forming (MGSF) is a new flexible stretch forming technology for sheet metal. A finite element model of the spherical parts was built by finite element software, the impact of different technics modes and process parameters on the forming quality of the parts was studied. The results show that sheet metal parts formed by MGSF attaches die more easily, its strain distribution is more uniform and its forming quality gets better than that formed by traditional stretch forming mode. The less is friction coefficient between the sheet metal and die, the less is thickness reduction. The transition zone is shortened, wrinkling defect is avoided and material utilization is improved in the MGSF. The simulated results were validated by experiments. The obtained achievements are useful for the optimal design of MGSF equipment and the plasticity processing study of practical sheet.

基金项目：

欧盟第六框架协议STREP:DATAFORM资助项目(ASTS-CT-2006-030877)；吉林大学“985工程”资助项目

参考文献：

［1］周朝晖，蔡中义，李明哲.多点模具拉形中回弹的数值模拟[J].锻压技术，2006，31（2）：94-96.
［2］侯红亮，余肖放，曾元松.国内航空钣金装备技术现状与发展[J].航空制造技术，2009，(1)：34-39.
［3］白笛，周贤宾，李东升.数控蒙皮拉形机试验系统及精度分析[J].北京航空航天大学学报，2004，30（4）：334-338.
［4］王丽丽，李东升，曹珺雯，等.可重构柔性模具蒙皮包覆拉形仿真系统开发[J].锻压技术，2009，34（2）：141-144.
［5］孔永明，周贤宾，吕杰武，等.蒙皮拉形模拟前置处理软件开发及关键技术研究[J].塑性工程学报，2001，8（2）：29-31.
［6］赵秋玲，李东升，周贤宾，等.基于蒙皮拉形模拟系统的后处理技术及开发[J].材料科学与工艺，2004，12（5）：553-556.
［7］Li Ming-zhe, Cai Zhong-yi, Sui Zhen, et al. Multi-point forming technology for sheet metal parts[J]. Journal of Materials Processing Technology, 2002, 129 (1/3) :333-338.
［8］Li Ming-zhe, Cai Zhong-yi, Liu Chun-guo, et al. Recent developments in multi-point forming technology[A]. Proceedings of the 8th International Conference on Technology of Plasticity[C]. Verona, Italy, 2005.
［9］Micari F. CAE of stretch forming processes[A]. Advanced Technology of Plasticity, Proc.4th ICTP[C]. Beijing, China 1993.
［10］郝瑞霞，付文智，李明哲.多道次多点成形过程的数值模拟研究[J].塑性工程学报，2006，13（1）：18-21．

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