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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 
单位:吉林大学无模成形技术开发中心 北华大学机械工程学院 
关键词:塑性加工 板材成形 拉形工艺 数值模拟 多钳式拉形 
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
作者简介:
参考文献:


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