Transactions of Materials and Heat Treatment

Title：Influences of crosssection parameters on forming quality for high strength steel square tube in rotary draw bending

Authors： Niu Weizhong Wang Qian

Unit： Lanzhou Jiaotong University

KeyWords： high strength steel thinwalled square tube rotary draw bending crosssection parameters finite element simulation

ClassificationCode：TG386.43

year,vol(issue):pagenumber：2018,43(10):84-90

Abstract：

In the rotary draw bending of thinwalled metallic square tube, distortion of crosssection, thinning of roof plate and wrinkling of bottom plate are common forming defects. In order to judge the influences of crosssection parameters of high strength steel square tube on the forming quality of bent tube, a threedimensional finite element model of square tube in rotary draw bending was built. When the crosssection side length and bending radius remained unchanged, the processes of 90° rotary draw bending under six sizes of JAC590Y square tubes were respectively simulated by the software Dynaform, and the major distortion parameters of bent square tubes with different sectional relative wallthickness and relative fillet radius were obtained. The analyses show that after high strength steel square tubes are bent to 90°, their maximum crosssection distortion appears in the front length of bent tubes with crosssection angle between 50° and 90°. When the crosssection side length and bending radius of square tube as well as the clearance between tube blank and die are fixed, the smaller the relative fillet radius and relative wallthickness of square tube are, the larger the crosssection distortion and the maximum wallthickness thinning rate of bent tube are, and the more easily its bottom plate wrinkles in the longitudinal direction, or the more obvious the wrinkling appears.

Funds：

甘肃省高等学校研究生导师科研项目(1004-04)

牛卫中（1962-），男，硕士，教授，E-mail：nwz@mail.lzjtu.cn；通讯作者：汪倩（1991-），女，硕士研究生，E-mail：2580950967@qq.com

Reference：

[1]刘郁丽,杨合,崔珊珊,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.

[2]刘郁丽,卢彩虹,赵刚要,等.间隙对薄壁矩形管绕弯成型截面畸变影响的研究[J].中国机械工程, 2008, 19(16): 1972-1975.

Liu Y L, Lu C H, Zhao G Y, et al. Effect of clearance on cross section distortion of thin-walled rectangular tube in rotary draw bending process [J]. China Mechanical Engineering, 2008, 19(16): 1972-1975.

[3]刘郁丽,李佳佳,赵刚要,等.铝合金薄壁矩形管绕弯成形起皱极限的预测[J].重庆大学学报,2011,34(1):47-52.

Liu Y L, Li J J, Zhao G Y, et al. Wrinkling limit prediction of rotary-draw bending process for thin-walled rectangular aluminum alloy tube [J]. Journal of Chongqing University, 2011,34(1):47-52.

[4]刘郁丽,任家海,朱英霞,等. H96薄壁矩形管绕弯回弹过程的应力应变分析[J].锻压技术,2012,37(1):146-149.

Liu Y L, Ren J H, Zhu Y X, et al. Stress-strain analysis of bending and springback for thin-walled rectangular tube of H96 brass [J]. Forging & Stamping Technology, 2012, 37(1): 146-149.

[5]张津,刘郁丽,赵刚要,等.材料参数对矩形管绕弯截面变形的影响[J].热加工工艺,2009,38(13): 1-4,7.

Zhang J, Liu Y L, Zhao G Y, et al. Influence of material parameters on rectangular tube cross section deformation in rotary draw bending process [J]. Hot Working Technology, 2009, 38(13): 1-4,7.

[6]周书辉,刘郁丽,沈化文,等.不同圆角过渡的3A21铝合金矩形管弯曲壁厚变化与损伤研究[J].航空材料学报, 2013, 33(2): 66-73.

Zhou S H, Liu Y L, Shen H W, et al. Distribution of wall thickness of rectangular tube with different fillet in bending process [J]. Journal of Aeronautical Materials, 2013, 33(2): 66-73.

[7]齐海雁,刘郁丽,杨合.芯模参数对3A21矩形管绕弯截面变形的影响研究[J].材料科学与工艺,2012,20(6): 97-102.

Qi H Y, Liu Y L, Yang H. Influence of mandrel parameters on cross-section deformation of 3A21 rectangular tube in rotary-draw bending process [J]. Materials Science & Technology, 2012, 20(6): 97-102.

[8]Zhu Y X, Liu Y L, Yang H. Sensitivity of springback and section deformation to process parameters in rotary draw bending of thin-walled rectangular H96 brass tube [J]. Transactions of Nonferrous Metals Society of China, 2012, 22(9): 2233-2240.

[9]赵熹,闫彬,薛勇,等.铝合金矩形管绕弯成形模型与参数优化研究[J].兵器材料科学与工程,2016,39(4): 82-86.

Zhao X, Yan B, Xue Y, et al. Model and parameters optimization of rotary-draw bending process for rectangular aluminum alloy tube [J]. Ordnance Material Science and Engineering, 2016, 39(4):82-86.

[10]Xing Z W, Xu Z W, Yang H L, et al. Numerical research on high-strength rectangular section steel tube in rotary-draw bending [J]. Key Engineering Materials, 2014, 620: 417-423.

[11]张丛远,徐岩,徐驰.矩形管弯曲实验及有限元仿真[J].机械制造与自动化,2014,43(4): 105-107,117.

Zhang C Y, Xu Y, Xu C. Bending experiments and finite element simulation of rectangular pipe [J]. Machine Building & Automation, 2014, 43(4): 105-107,117.

[12]鄂大辛,周大军.金属管材弯曲理论及成形缺陷分析[M].北京:北京理工大学出版社,2016.

E D X, Zhou D J. Metal Tube Bending: Theory and Forming Defects Analysis [M]. Beijing: Beijing Institute of Technology Press, 2016.

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