The spring-back phenomenon of tube bending occurs consequentially after unloading, which reduces the accuracy of tube manufacturing and processing efficiency. Therefore, it becomes the focus of study in tube bending. In this paper, the spring-back of a non-planar bended tube is projected onto two mutually perpendicular planes. The mathematical relationship of the radii of the bended plane before and after the spring-back is built through a pure bending spring-back experiment, and then the spring-back on the special planes are transformed into 3D, partitioned non-planar tubes after the spring-back are merged in the space in accordance with a special law. Thus, the re-construction of the non-planar tube shape which takes into consideration the spring-back is determined based on the above process. This spring-back prediction method can be useful for the maintenance of the bending die. It will ensure that the new shape meets the requirements of geometric accuracy of the non-planar bended tube.
ZHANG Shen, WU Jianjun
. Spring-back Prediction of Non-planar Tube Bending[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011
, 32(5)
: 953
-960
.
DOI: CNKI:11-1929/V_20101028.1834.004
[1] 温彤. 管材成形技术综述[J]. 机械设计与制造, 2006(11): 77-79. Wen Tong. A view of pipe and tube forming technology[J]. Machinery Design & Manufacture, 2006(11): 77-79. (in Chinese)
[2] Xiao X T, Liao Y J, Sun Y S, et al. Study on varying curvature push-bending technique of rectan gular section tube[J]. Journal of Materials Processing Technology, 2007, 187-188: 476-479.
[3] 刘婧瑶, 唐承统, 宁汝新. 薄壁管纯弯曲塑性成形分析及回弹计算[J]. 塑性工程学报,2009, 16(2): 5-9. Liu Jingyao, Tang Chengtong, Ning Ruxin. Plastic-formation analysis and springback calculating of thin-wall tube pure-bending[J]. Journal of Plasticity Engineering, 2009, 16(2): 5-9. (in Chinese)
[4] 杨合,孙志超,林艳,等. 管成形技术发展基础问题研究[J]. 塑性工程学报, 2001,8(2): 83-85. Yang He, Sun Zhichao, Lin Yan, et al. Advanced plastic processing technology and research progresson tube forming[J]. Journal of Plasticity Engineering, 2001, 8(2): 83-85. (in Chinese)
[5] 詹梅,杨合,江志强.管材弯曲成形的国内外研究现状及发展趋势[J]. 机械科学与技术,2004,23(12):1509-1514. Zhan Mei, Yang He, Jiang Zhiqiang. State of the art of research on tube bending process[J]. Mechanical Science and Technology, 2004, 23(12): 1509-1514. (in Chinese)
[6] 苏岚,王先进,唐荻,等.汽车行业中管件液压成形技术的新进展[J].金属成形工艺, 2002, 20(1): 12-15. Su Lan, Wang Xianjin, Tang Di, et al. New development of tube hydro forming technology in automobile industry[J]. Metal Forming Technology, 2002,20(1):12-15. (in Chinese)
[7] Neugebauer R, Drossel W G, Lorenz U, et al. A new concept for 3D-free-form bending of tubes and profiles to perform hydroforming parts and end form space-frame-components[J]. Advance Plastic Technology, 2002(2): 1465-1470.
[8] Gantner P, Bauer H, Harrison D K, et al. Free-bending—a new bending technique in the hydroforming process chain[J]. Journal of Materials Processing Technology, 2005, 167(2-3): 302-308.
[9] 刘婧瑶, 唐承统, 宁汝新. 管材数控绕弯回弹实验研究及BP网络预测模型[J]. 塑性工程学报, 2009, 16(6): 85-90. Liu Jingyao, Tang Chengtong, Ning Ruxin. The experimental study on the springback and BP NN prediction model of NC rotary-bending of tube[J]. Journal of Plasticity Engineering, 2009, 16(6): 85-90. (in Chinese)
[10] 甘忠, 熊威, 张志国. 2124铝合金时效成形回弹预测[J]. 塑性工程学报, 2009, 16(3): 140-144. Gan Zhong, Xiong Wei, Zhang Zhiguo. Springback prediction of age-forming for 2124 aluminum alloy [J]. Journal of Plasticit Engineering, 2009, 16(3): 140-144. (in Chinese)
[11] 李雁鹏,吴建军. 非平面弯管成形过程的回弹补偿研究[J]. 锻压技术, 2009, 34(1): 89-92. Li Yanpeng, Wu Jianjun. Study on spring-back compensation for non-plane tube bending process[J]. Forging & Stamping Technology, 2009, 34(1): 89-92. (in Chinese)
[12] 庞玉华. 金属塑性加工学[M]. 西安:西北工业大学出版社, 2005. Pang Yuhua. Metal plastics forming[M]. Xi’an: Northwestern Polytechnical University Press, 2005. (in Chinese)
[13] 石振东,刘国庆. 实验数据处理与曲线拟合技术[M]. 哈尔滨: 哈尔滨船舶工程学院出版社, 1991: 206-234. Shi Zhendong, Liu Guoqing. Experimental data processing and technology of curve simulating[M]. Harbin: Harbin Engineering University Press, 1991: 206-234. (in Chinese)
[14] 钱政,王中宇,刘桂礼. 测试误差分析与数据处理[M]. 北京: 北京航空航天大学出版社, 2008: 110-132. Qian Zheng, Wang Zhongyu, Liu Guili. Testing error analysis and data processing[M]. Beijing: Beihang University Press, 2008: 110-132. (in Chinese)
[15] Al-Qureshi H A. Elastic-plastic analysis of tube bending[J]. International Journal of Machine Tools & Manufacture, 1999, 39(1): 87-104.
CJA