Transactions of Materials and Heat Treatment

Title：Influence of mandrel extension length on NC bending forming quality of 0Cr21Ni6Mn9N stainless steel tube

Authors： Xu Xiaomei Lu Shiqiang Fang Jun Wang Kelu Xu Jianmei

Unit： Nanchang Hangkong University Nanjing University of Aeronautics and Astronautics

KeyWords： mandrel extension length 0Cr21Ni6Mn9N stainless steel tube FEM forming quality

ClassificationCode：TG386

year,vol(issue):pagenumber：2014,39(5):73-77

Abstract：

A finite element model for the NC bending, retracting and springback process of 0Cr21Ni6Mn9N stainless steel tube was established with FE software ABAQUS and its reliability was verified. Based on the model, the influences of mandrel extension length e on the cross section deformation, change ratio of wall thickness, wrinkling tendency and springback angle were analyzed. The results show that the cross section deformation ratio and springback angle decrease as mandrel extension length e increases, when e is greater than 2.5 mm, tube appears “goose head” phenomenon. With the increase of mandrel extension length, the outside wall thinning ratio increases, inside wall thickening ratio decreases, and the decreasing tendency is not obvious. With the increase of mandrel extension length, the wrinkling tendency decreases firstly and then increases. The suitable mandrel extension length range is 1.5-2 mm.

Funds：

国家自然科学基金资助项目（51164030）

许小妹（1989-），女，硕士研究生鲁世强（1962-），男，博士，教授，博士生导师

Reference：

［1］王同海. 管材塑性加工技术[M]. 北京: 机械工业出版社, 1998. Wang Tonghai. Tube Plastic Processing Technology[M].Beijing: China Machine Press,1998.
［2］Yang He, Li Heng, Zhang Zhiyong, et al. Advances and trends on tube bending forming technologies [J]. Chinese Journal of Aeronautics, 2012, 1(12):1-12.
［3］王立新. 矢量弯管[M]. 北京: 国防工业出版社, 1984. Wang Lixin. Vector Tube Bending[M]. Beijing: National Defence Industry Press, 1984.
［4］王振华. 不锈钢管力学性能的拉伸试验[J]. 塑性工程学报, 2012, 19(2):56-59. Wang Zhenhua. Tensile test and study on the mechanical properties of stainless steel tube[J]. Journal of Plasticity Engineering, 2012, 19(2):56-59.
［5］Levent Szen, Mehmet A Guler, Deniz Bekar, et al. Investigation and prediction of springback in rotary-draw tube bending process using finite element method[J]. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2012, 12(226): 1-15.
［6］Gu Ruijie,Yang He,Zhan Mei, et al. Effect of mandrel on cross section quality of thin-walled tube numerical controlled bending[J]. Transactions of Nonferrous Metals Society of China, 2005, 15(6): 1264-1274.
［7］詹梅,杨合,李镇. 数控弯管中芯棒对管壁厚减薄作用的有限元分析[J].机械科学与技术, 2004, 23(6): 669-670.Zhan Mei, Yang He, Li Zhen. Finite element analysis of influence of mandrel on thinning ratio of wall in NC tube bending[J]. Mechanical Science and Technology, 2004, 23(6): 669-670.
［8］张凯, 刘郁丽, 杨合. 抽芯对H96薄壁矩形波导管绕弯成形回弹的影响[J].材料科学与工艺, 2013,21(1): 56-61.Zhang Kai, Liu Yuli, Yang He, Influence of retracting mandrel on springback of H96 thin-walled rectangular wave-guide tube in rotary draw bending process[J]. Materials Science and Technology, 2013,21(1): 56-61.
［9］Levent Szen, Mehmet A Guler, Recep M Grgülüarslan, et al. Prediction of springback in CNC tube bending process based on forming parameters[A]. 11th International LS-DYNA Users Conference[C]. Detroit,2010.
［10］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 Siyi, Xia Qinxiang, Sheng Xiangfei, 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.
［11］岳永保. 钛合金管数控弯曲成形过程数值模拟及实验研究[D]. 西安: 西北工业大学, 2009.Yue Yongbao. Numerical Simulation and Experiment Study on Ti-Alloy Tube NC Bending Process[D].Xi‘an: Northwestern Polytechnical University, 2009.
［12］刘树勋, 刘宪明, 王维明. 不同变形量对 0Cr21Ni6Mn9N不锈钢力学性能的影响[J]. 钢铁, 2005, 40(11): 67-70.Liu Shuxun, Liu Xianming, Wang Weiming. Effect of cold deformation on mechanical properties of 0Cr21Ni6Mn9N stainless steel[J]. Iron and Steel, 2005, 40(11): 67-70.
［13］方军, 鲁世强, 王克鲁, 等. 0Cr21Ni6Mn9N不锈钢管材数控弯曲截面畸变有限元分析[J]. 塑性工程学报，2013,20(5):71-76.Fang Jun, Lu Shiqiang, Wang Kelu, et al. FE analysis of section distortion in numerical control bending of the 0Cr21Ni6Mn9N stainless steel tube[J]. Journal of Plasticity Engineering, 2013,20(5):71-76.
［14］李恒. 多模具约束下薄壁管数控弯曲成形过程失稳起皱行为研究[D]. 西安:西北工业大学, 2007.Li Heng. Study on Wrinkling Behaviors under Multi-die Constraints in Thin-walled Tube NC Bending[D]. Xian: Northwestern Polytechnical University, 2007.

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