Simulation analysis of plastic deformation and residual stress distribution of radial ring rolling
-
摘要: 为了消除环件冷轧过程中产生的残余应力,采用弹塑性大变形有限元法对环件径向冷轧过程进行仿真.研究揭示了矩形截面铝合金环件径向冷轧工艺中总压下量不变时,芯辊进给速度对环件塑性变形大小及分布规律的影响.结果表明:进给速度相对较小时,环件鱼尾形状系数较大,随着进给速度进一步增大,鱼尾形状系数反而减小.根据塑性变形的不一致性产生残余应力的原理,进一步分析由此塑性变形规律形成的残余应力分布情况,从而为消除冷轧后残余应力提供理论依据.Abstract: To eliminate the residual stress formed during the process of ring rolling, the radial ring rolling was simulated by elas-plastics large deformation finite element analysis. Al alloy rings with rectangular cross-section were adopted as workpieces and total depressing amounts of mandrel with different feed velocities were identical. Magnitude and distribution of plastic deformation in different feed velocity of mandrel were studied. The simulated results show that the fishtail shape coefficient is high when the feed velocity is relatively low and will be reduced with increase of feed velocity. According to the mechanism that inconsistent plastic deformation is the cause of residual stress, the corresponding residual stress distribution of radial ring rolling was analyzed. The research provides foundation for the residual stress relief study.
-
Key words:
- radial rolling /
- finite element /
- residual stress
-
[1] 米谷茂. 残余应力的产生和对策[M]. 北京:机械工业出版社,1983:210-214 Mi Gumao. The produce and countermeasure of residual stress[M].Beijing:China Machine Press, 1983:210-214( in Chinese) [2] Wang Min, Yang He, Sun Zhichao, et al. Dynamic explicit FE modeling of hot ring rolling process[J]. Transactions of Nonferrous Metals Society of China, 2006,16:1274-1280 [3] 华林,黄兴高,朱春东. 环件轧制理论和技术[M]. 北京:机械工业出版社,2001:7-8 Hua Lin, Huang Xingao, Zhu Chundong. Theory and technology of ring rolling[M]. Beijing:China Machine Press, 2001:7-8( in Chinese) [4] 李兰云,杨合,郭良刚,等. 芯辊进给速度对环件冷轧工艺的影响规律[J]. 机械科学与技术,2005,24(7):809-811 Li Lanyun, Yang He, Guo Lianggang, et al. Effect of feed velocity of mandrel on cold ring roll process[J]. Mechanical Science and Technology,2005,24(7): 809-811(in Chinese) [5] 方博武. 金属冷热加工的残余应力[M]. 北京:高等教育出版社,1991:84-86 Fang Bowu. Residual stress of metal cold-thermal manufacture[M]. Beijing: China Higher Education Press, 1991:84-86( in Chinese) [6] 赵丽丽,张以都. 预拉伸板轧制-拉伸残余应力的计算机仿真[J]. 北京航空航天大学学报,2004,30(7):605-609 Zhao Lili, Zhang Yidu. Computer simulation of residual stress for cold rolling prestretching board[J]. Jounal of Beijing University of Aeronautics and Astronautics, 2004, 30(7): 606-609( in Chinese) -
点击查看大图
计量
- 文章访问数: 2500
- HTML全文浏览量: 146
- PDF下载量: 1385
- 被引次数: 0
下载:
