具有防皱功能的多点成形工艺数值模拟

›› 2012, Vol. 42 ›› Issue (05): 1208-1213.

具有防皱功能的多点成形工艺数值模拟

刘志卫, 李明哲, 韩奇钢

吉林大学无模成形技术开发中心,长春 130022

收稿日期:2011-11-09 出版日期:2012-09-01 发布日期:2012-09-01
通讯作者: 李明哲(1951-),男,教授,博士生导师.研究方向:无模成形工艺及设备,塑性加工过程数值模拟. E-mail:limz@jlu.edu.cn E-mail:limz@jlu.edu.cn
基金资助:
欧盟第六框架协议计划航空航天领域国际合作项目(ASTS-CT-2006-030877).

Numerical simulation on multi-point sheet metal forming with wrinkle resistance function

LIU Zhi-wei, LI Ming-zhe, HAN Qi-gang

Dieless Forming Technology Center, Jilin University, Changchun 130022, China

Received:2011-11-09 Online:2012-09-01 Published:2012-09-01

摘要/Abstract

摘要： 介绍了一种无需压边圈的防皱多点成形方法,与目前常用的多点模具成形方法不同,在防皱多点成形方法中防皱单元与调形单元交错排列,离散的防皱单元在成形区内对板料进行挟持,且能够随板料的变形上下浮动。运用有限元方法对球形曲面在防皱多点成形方式中的成形过程进行了数值模拟,分析了板厚、防皱单元的压力对最大成形曲率的影响,并与多点模具成形进行了对比。研究发现,防皱多点成形方法能够很好地抑制板料在成形过程中的起皱现象。球形曲面采用防皱多点成形方式时能够获得明显大的变形量。板料越薄,防皱多点成形方法所能获得的效果越显著。增大防皱单元的压力能够提高防皱多点成形的防皱能力。

关键词: 材料合成与加工工艺, 板料成形, 多点成形, 起皱, 数值模拟

Abstract: A multi-point forming with wrinkle resistance function(MPFWR) was introduced which doesn't need the edge-pressing ring. This forming mode is different from the common multi-point die forming(MPDF) in that the winkle resistant holders and form adjusting holders arrange alternately. Holding the whole blank in the forming zone, the discrete wrinkle resistant holders can float up and down along with the blank. The forming process of a spherical part in MPFWR was simulated using a finite element analysis software. The effects of the sheet metal blank thickness and the wrinkle resistant holder force on the maximum deformability were analyzed, and the results were compared with those of MPDF. It was found that the MPFWR can restrain the wrinkle of the sheet blank, gives out the obviously larger formability of the spherical part. The thinner of the blank, the better its formability. The wrinkle resistance can be enhanced by increasing the holder force.

Key words: material synthesis and processing technology, sheet metal forming, multi-point forming, wrinkle, numerical simulation

中图分类号:

TG386

刘志卫, 李明哲, 韩奇钢. 具有防皱功能的多点成形工艺数值模拟[J]. , 2012, 42(05): 1208-1213.

LIU Zhi-wei, LI Ming-zhe, HAN Qi-gang. Numerical simulation on multi-point sheet metal forming with wrinkle resistance function[J]. , 2012, 42(05): 1208-1213.

参考文献

[1] Li M Z, Fu W Z, Pei Y S, et al. 2000 kN multi-point forming press and its application to the manufacture of high-speed trains//Advanced Technology of Plasticity, Proceedings of the 7th ICTP, Yokohama, 2002.
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[3] 谭富星, 李明哲, 钱直睿, 等. 钛合金颅骨修复体的多点成形数值模拟[J]. 吉林大学学报: 工学版, 2006, 36(6): 851-855. Tan Fu-xing, Li Ming-zhe, Qian Zhi-rui, et al. Numerical simulation on process of multi-point forming for titanium alloy cranial prosthesis[J]. Journal of Jilin University (Engineering and Technology Edition), 2006, 36(6): 851-855.
[4] 李明哲, 中村敬一, 渡辺忍,等.基本的な成形原理の检讨(板材多点成形法の研究第1报 )//日本平成4年度塑性加工春季讲演会论文集, 横滨, 1992. Li Ming-zhe, Nakamura K, Watanabe S, et al. Study of the basic principles(1st report: Research on multi-point forming for sheet metal)//Proc of the Japanese Spring Conf for Technology of Plasticity, Yokohama, 1992.
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