Transactions of Materials and Heat Treatment

Title：Bending process of thin-walled stainless steel tube with corrugated section

Authors： Xu Yong Jin Pengfei Tian Yaqiang Xia Liangliang Zhang Shihong Lu Han Wang Weixing

Unit： North China University of Science and Technology Chinese Academy of Sciences

KeyWords： stainless steel thin-walled corrugated tube stretch bending springback compensation bending angle

ClassificationCode：TG306

year,vol(issue):pagenumber：2020,45(6):71-79

Abstract：

In order to further analyze the bending process of thin-walled stainless steel tube with corrugated section, the finite element model of stretch bending process including bending, extraction mandrel and springback was established by ABAQUS/Explicit and ABAQUS/Standard, and the influences of push speed and bending angle on the forming quality were studied by the combination of FE simulation and experiment. Moreover, the law of springback was investigated under different bending angles, and the springback compensation function was established and verified by experiment. The results show that push speed has no obviously effect on thickness distribution and section distortion ratio of bending section, on the contrary, has great effect on the corrugated section. Furthermore, the corrugated section length, the corrugation spacing and the corrugation displacement change the least when the push speed equals to the neutral layer linear velocity of V0. And the thickening or thinning ratio inside and outside of tube appear a ‘platform’ phenomenon and the wall thickness distribution is more uniform when the bending angle is greater than 60°. Meanwhile, the relationship between springback amount and bending angle is a linear function, and the springback compensation function proved by experiment is applied on the bending process of thin-walled stainless steel tube with corrugated section accurately.

Funds：

国家自然科学基金资助项目（51875548）；江苏省重点研发项目（BE2016156）

徐勇（1983-），男，博士，副研究员 E-mail：yxu@imr.ac.cn 通讯作者：张士宏（1962-），男，博士，研究员 E-mail：shzhang@imr.ac.cn

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