Numerical Simulation of Springback in Sheet Metal Forming
-
摘要: 回弹是板料成形过程中不可避免的现象.回弹的数值模拟作为解决回弹问题的有效方法,越来越受到工业界和学术界的重视.完整的回弹数值模拟分为2步,即冲头加载成形过程模拟和冲头卸载回弹过程模拟.本文比较了静力隐式和动力显式2种算法在计算回弹问题时的优劣,采用静力隐式算法建立了计算冲头加载成形过程模拟和冲头卸载回弹过程模拟的有限元模型,并利用自行开发的软件给出了计算实例.Abstract: Springback is an inevitable phenomenon in sheet metal forming process. As an effective method to solve springback problem, numerical simulation is receiving increasing attention throughout industry and academic world. Integrated springback simulation can be divided into two steps, that is punch loading forming process simulation and punch unloading springback process simulation. The quasi-static implicit approach and dynamic explicit approach in springback simulation are described, and their advantages and disadvantages in computing springback problems are compared. A FEM model for punch loading forming process simulation and punch unloading springback process simulation is introduced and a computing example using software developed by authors is given.
-
Key words:
- numerical simulation /
- resilience /
- stamping /
- sheet metal forming
-
[1] Joannic D, Gelin J C. Accurate simulation of springback in 3D sheet metal forming processes. In:NUMIFORM'95. 1995. 729~734. [2] Karafillis A P, Boyce M C. Tooling design in sheet metal forming using springback calculations[J]. Int J Mech Sci, 1992, 34(2):113~131. [3] Wu Longwu. Iterative FEM die surface design to compensate for springback in sheet metal stampings. In:NUMIFORM'95. 1995.637~641. [4] 宋 黎,杨 坚,黄天泽. 板料弯曲成形的回弹分析与工程控制综述[J]. 锻压技术,1996, 21(1):18~22. [5] Shu Jawshi, Huang Chinghua. Finite element analysis and optimization of springback reduction:the "double-bend" technique[J]. Int J Mech Tools Manufacture, 1996, 36(4):423~434. [6] Mercer C D, Nagtegaal J D, Rebelo N, et al. Effective application of different solvers to forming simulations. In:NUMIFORM'95. 1995. 469~474. [7] 蒋镜昱,印雄飞. 板料成形过程的数值模拟[J].模具技术,1998(4):17~22. [8] Peng Yinghong, You Ye, Ruan Xueyu. The new calculation method of drawbead restrain force. In:NUMISHEET'99. 1999.255~260. [9] Zhou D, Wagoner R H. Development and application of sheet-forming simulation[J]. Journal of Material Processing Technology, 1995, 50(1):1~16. [10] Makinouchi A. Sheet metal forming simulation in industry[J]. Journal of Material Processing Technology, 1996, 60(1):19~26. [11] Chou Inan, Huang Chinghua. Finite element analysis and optimization of springback reduction[J]. International Journal of Machine Tools & Manufacture, 1999,39(3):517~536. -
点击查看大图
计量
- 文章访问数: 2525
- HTML全文浏览量: 88
- PDF下载量: 1370
- 被引次数: 0
下载:
