东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (10): 1435-1440.DOI: 10.3969/j.issn.1005-3026.2015.10.015

• 材料与冶金 • 上一篇    下一篇

曲面件柔性拉伸成形时的过渡区

程艳艳1， 李明哲1， 邢健1,2，王友1   

  1. (1. 吉林大学 无模成形技术开发中心， 吉林 长春130025；2. 东北电力大学 工程训练中心， 吉林 吉林132012)
  • 收稿日期:2014-11-19 修回日期:2014-11-19 出版日期:2015-10-15 发布日期:2015-09-29
  • 通讯作者: 程艳艳
  • 作者简介:程艳艳(1980-)，女，吉林省吉林市人，吉林大学博士研究生，吉林工业职业技术学院讲师; 李明哲(1951-)，男，吉林长春人，吉林大学教授，博士生导师.
  • 基金资助:

    欧盟第七框架协议计划国际合作项目(FlexiTool-CT-2010-261925).

Transition Zones in Flexible Stretch Forming for Surface Parts

CHENG Yan-yan1 ， LI Ming-zhe1 ， XING Jian1,2 ， WANG You1   

  1. 1. Dieless Forming Technology Center， Jilin University， Changchun 130025，China; 2. Engineering Training Center， Northeast Dianli University， Jilin 132012， China.
  • Received:2014-11-19 Revised:2014-11-19 Online:2015-10-15 Published:2015-09-29
  • Contact: LI Ming-zhe
  • About author:-
  • Supported by:

    -

RichHTML

0

PDF (PC)

850

摘要：

利用多夹钳式拉伸成形机能够实现夹持和拉伸成形的柔性化特点，对投影面为梯形的曲面件分别建立矩形板料和梯形板料夹持有限元模型，并进行了不同过渡区的矩形板料和梯形板料的数值模拟.结果表明，随着过渡区最大长度的减小，板料容易贴模，成形力减小，成形件的最大应变值减小，有效成形区应变、厚度分布更均匀，成形效果更好.对投影面为梯形的曲面件进行拉伸成形实验，实验结果与数值模拟结果吻合，验证了数值模拟的正确性.多夹钳式拉伸成形机能够根据模具形状合理设计过渡区形状，提高成形质量，节省材料，降低拉伸成形成本.

关键词: 塑性加工, 板料成形, 拉伸成形工艺, 数值模拟, 过渡区

Abstract:

According to the characteristics that the multi-gripper stretch forming machine can realize the flexibility of clamping and stretching， finite element models of rectangular and trapezoidal sheet metal were built for surface parts of trapezoidal projection plane， and numerical simulations of different transition zones for rectangular and trapezoidal metal sheets were conducted. The results showed that with the decrease of the maximum length of the transition zone， the conformability of the sheet metal to the forming die was increased， the forming force together with the maximum strain of the formed parts decreased while the strains and thickness of the effective forming zone distributed more uniformly and the formability was much better. Stretch forming experiments were done for the surface part of trapezoidal projection plane， and the experimental results were coincident with the numerical simulation results， which proved the validity of simulation. The multi-gripper stretch forming machine can reasonably choose the transition zone shape according to the shape of forming die， which improves forming quality and reduces the material and stretch forming costs.

Key words: plasticity processing, sheet metal forming, stretch forming process, numerical simulation, transition zone

中图分类号: