Transactions of Materials and Heat Treatment

Title：Research on springback behavior of Ω-shape thin-walled tube by multi-pass rotary bending

Authors： Yu Haiyan Shen Jiayi Ai Chenchen

Unit： Tongji University

KeyWords： rotary bending springback elastic modulus thin-walled tube

ClassificationCode：TG386

year,vol(issue):pagenumber：2014,39(12):39-44

Abstract：

The four rotary bending and springback of Ω-shaped thin-wall tube were simulated by LS-DYNA software. The changing rule of wall thickness and the final springback were measured and analyzed. Then the simulation results were compared with the experimental ones. The influence of elastic modulus changed on springback during plastic deformation was analyzed. Results show that the latter bending angle affects the springback of the formed bending angle in the multi-bending process of Ω-shaped thin-wall tube, which results in the geometry asymmetric of the final part. The total recovery is composed by elastic recovery and inelastic recovery due to the variation of elastic modulus with plastic strain. Inelastic recovery increases springback, and the percentage of inelastic recovery is up to 24% for the bigger angle.

Funds：

国家自然科学基金资助项目（51175382）；上海市科委科研计划项目资助项目（11ZR1439900）

余海燕（1976-），女，博士，副教授

Reference：

[1]余海燕,艾晨辰,孙喆. 模具间隙对薄壁管绕弯成形的影响规律[J]. 精密成形工程,2012,（2）:15-18，31.

Yu H Y, Ai C C, Sun Z. Influences of tools gap on formability and springback of thin-walled tube during rotary bending[J]. Journal of Netshape Forming Engineering,2012,(2): 15-18,31.

[2]刘郁丽, 杨合, 崔姗姗, 等. 薄壁矩形管弯曲过程截面畸变的三维有限元分析[J]. 塑性工程学报, 2007,14(3):72-75.

Liu Y L , Yang H , Cui S S , et al. 3-D FEM analysis of section distortion in bending process of the thin-walled rectangular tube[J]. Journal of Plasticity Engineering, 2007,14(3): 72-75.

[3]杨合, 孙志超, 詹梅. 局部加载控制不均匀变形与精确塑性成形研究进展[J]. 塑性工程学报, 2008, 15(2):6-14.

Yang H , Sun Z C , Zhan M . Advances in control of unequal deformation by locally loading and theories related to precision plastic forming[J]. Journal of Plasticity Engineering, 2008, 15(2):6-14.

[4]Zhao G Y, Liu Y L, Dong C S, et al. Analysis of wrinkling limit of rotary-draw bending process for thin-walled rectangular tube[J]. J. Mater. Proc. Technol., 2010, 210(9): 1224-1231.

[5]张东星,于雪超,周爽,等. 基于PAM-TUBE 2G的导管弯曲成形规律数值模拟分析[J]. 锻压技术, 2011,36(4): 148-151.

Zhang D X, Yu X C, Zhou S, et al. Simulation analysis on forming laws of NC tube bending based on PAM-TUBE 2G[J]. Forging & Stamping Technology, 2011,36(4): 148-151.

[6]Chen J, Daxin E, Zhang J. Effects of process parameters on wrinkling of thin-walled circular tube under rotary draw bending[J]. Int. J. Adv. Manuf. Technol., 2013, 68(5-8): 1505-1516.

[7]Paulsen F, Welo T. Cross sectional deformations of rectangular hollow sections in bending: Part II-analytical models[J]. International Journal of Mechanical Sciences, 2001, 43(1): 131-152.

[8]Zhu H, Stelson K A. Distortion of rectangular tubes in stretch bending[J]. Journal of Manufacturing Science and Engineering, 2002, 124(4): 886-890.

[9]Utsumi N, Sakaki S. Counter measures against undesirable phenomena in the draw bending process for extruded square tubes[J]. Journal of Materials Processing Technology, 2002, 123(2): 264-269.

[10]Miller J E, Kyriakides S, Bastard A H. On bend-stretch forming of aluminum extruded tubes: Experiments[J]. International Journal of Mechanical Sciences, 2001, 43(5):1283-1317.

[11]Miller J E, Kyriakides S. Three-dimensional effects of the bend-stretch forming of aluminum tubes[J]. International Journal of Mechanical Sciences, 2003, 45(1): 115-140.

[12]Shen H, Liu Y, Qi H, et al. Relations between the stress components and cross-sectional distortion of thin-walled rectangular waveguide tube in rotary draw bending process[J]. Int. J. Adv. Manuf. Technol., 2013, 68(1-4): 651-662.

[13]Endow J, Murofa T. 圆管横截面在均匀弯曲时的变扁[A].世界塑性加工最新技术译文集[C].北京，1987.

Endow J, Murofa T. The cross-section distortions in uniform tube bending[A]. World′s Latest Plastic Processing Technologies[C]. Beijing: China Machine Press, 1987.

[14]官强, 徐小兵. 圆管绕弯横截面畸变的数值模拟研究[J]. 机械设计与制造, 2011,(10): 202-203.

Guan Q , Xu X B . Numerical simulation of cross-sectional distortions in tube bending[J]. Machinery Design & Manufacture, 2011,(10): 202-203.

[15]叶福民,章威. 薄壁圆管绕弯壁厚减薄数值模拟研究[J]. 江苏科技大学学报：自然科学版,2013,27(1):39-42.

Ye F M , Zhang W . Numerical simulation of outwall thinning in the thin-wall pipe rotary bending[J]. Journal of Jiangsu University of Science and Technology：Natural Science Edition,2013,27（1）:39-42.

[16]李思漪, 夏琴香, 盛湘飞,等. 基于数值模拟的薄壁管冷弯成形工艺研究[J]. 锻压技术,2011,36（4）:163-167.

Li S Y, Xia Q X, Sheng X F, et al. Study of forming process for thing- walled tube rotary bending based on numerical simulation[J]. Forging & Stamping Technology,2011,36（4）:163-167.

[17]Dwivedi J P, Shah S K, Upadhyay P C, et al. Springback analysis of thin rectangular bars of non-linear work-hardening materials under torsional loading[J]. International Journal of Mechanical Sciences, 2002, 44(7): 1505-1519.

[18]El Megharbel A, El Nasser G A, El Domiaty A. Bending of tube and section made of strain-hardening materials[J]. Journal of Materials Processing Technology, 2008, 203(1): 372-380.

[19]Cleveland R M, Ghosh A K. Inelastic effects on springback in metals[J]. International Journal of Plasticity,2002,18(5):769-785.

[20]Luo L, Ghosh A K. Elastic and inelastic recovery after plastic deformation of DQSK steel sheet[J]. Journal of Engineering Materials and Technology, 2003, 125(3): 237-246.

[21]余海燕,鲍立,高云凯. 相变诱发塑性钢板的非弹性回复行为及其对回弹的影响[J]. 机械工程学报,2010,46(18):46-51.

Yu H Y , Bao L , Gao Y K . Inelastic recovery behavior of transformation-induced plasticity steels and its influence on springback[J]. Journal of Mechanical Engineering,2010,46(18):46-51.

[22]余海燕, 艾晨辰, 杨兵. 薄壁U形圆管多道次绕弯成形性分析[J]. 塑性工程学报,2010,17(1): 40-44.

Yu H Y, Ai C C, Yang B. Analysis on formability of thin-walled U-shaped tube during multi-pass rotary bending[J]. Journal of Plasticity Engineering,2010,17(1): 40-44.

[23]麻宁绪, 梅津康义, 渡边佑子，等. 通过吉田-上森模型进行回弹预测和利用Jstamp进行回弹补偿的研究[J]. 模具制造, 2011, 11(5): 1-6.

Ma N X, Umezu Y, Watanabe, et al. Springback prediction by Yoshida-Uemori model and compensation of tool surface using JSTAMP[J]. Mold Manufacturing, 2011,11 (5):1-6.

Service：

【This site has not yet opened Download Service】【Add Favorite】