锻压技术

芯棒对薄壁TA2钛管冷推弯曲成形影响的研究

英文标题：Research on influence of mandrels on the cold push-bending of thick-walled TA2 pipe

作者：郝静张旭吉卫喜张庆争

关键词：TA2钛管材冷推弯芯棒数值模拟

分类号：TG386

出版年,卷(期):页码：2015,40(11):40-47

摘要：

为了掌握芯棒参数对大口径薄壁钛管材冷推弯曲成形质量的影响规律，选取了直径为Ф219 mm、壁厚为3.2 mm的TA2管材为研究对象，基于DYANFORM有限元软件建立了TA2钛管材冷推弯曲有限元模型，并利用冷推实验验证了所建模型的可靠性。基于所建的有限元模型，研究了芯棒结构、芯棒直径、芯棒形式对大口径薄壁TA2管材冷推成形结果的影响规律。研究结果表明：阶梯式芯棒可以有效预防成形弯头起皱现象的发生；随着芯棒直径的减小，外弧侧壁厚减薄率先增大后减小，内弧侧壁厚增厚率和截面椭圆度均有增大的趋势，内间隙的合理取值区间为0.5~1.5；刚性芯棒和液压均可以有效限制截面畸变的发生。

In order to find out the influence regularity of mandrel on the cold push-bending process of large-diameter thin-walled titanium TA2 tube, a TA2 tube with the dimension of Ф219 mm×3.2 mm by experiment was studied. A titanium TA2 tube cold push-bending finite model was set up based on software DYNAFORM and the reliability of the model was verified through cold push-bending experiment. The influence regularities of mandrel structure, diameter and form on the large-diameter thin-walled TA2 were studied based on the established finite element model. Results show that stepped mandrels can prevent the TA2 elbow from wrinkling, with the decrease of mandrel diameter, the external arc side wall thinning-rate increases at first and then decreases while both the inner arc side wall thickening ratio and the ovality of section have the tendency of increase with reasonable interval value gap between 0.5 to 1.5, so the mandrel and hydraulic can effectively prevent the TA2 from cross-section distortion.

基金项目：

南通市科技项目“废铅酸电池极板中铅清洁回收预处理设备的研发”（BK2014018）；江苏省“六大人才高峰”资助项目(2010-JXQC-089)

郝静（1969-），女，本科，副教授，高级工程师吉卫喜（1961-），男，博士，教授

参考文献：

［1］张旭，吉卫喜，朱明清，等.基于虚拟正交试验的TA2弯头冷推制工艺参数优化设计[J].锻压技术，2015，40（2）:46-51.Zhang X, Ji W X, Zhu M Q, et al. Optimization on technological parameters of TA2 elbow cold pushing process based on virtual orthogonal experiment[J]. Forming & Stamping Technology, 2015，40（2）:46-51.
［2］杨碧芸，李浩，惠星. 统计技术在钛管材质量管理中的应用[J].机械工程与自动化, 2014, 4(2): 133-135.Yang B Y, Li H, Hui X. Application of statistical techniques in quality management of titanium tubes [J]. Mechanical Engineering ＆ Automation , 2014, 4(2): 133-135.
［3］马小菊, 杨亚社, 母果路, 等. 变形量及热处理对高标纯钛管材组织与性能的影响[J]. 热加工工艺，2014, 43(10): 177-178.Ma X J, Yang Y S, Mu G L, et al. Effect of deformation and heat treatment on microstructure and mechanical properties of high-specification pure titanium tube [J]. Hot Working Technology, 2014, 43(10): 177-178.
［4］王瑞琴，黄先明，付文杰，等. TA1钛板材的组织和性能改进[J]. 金属热处理，2014, 39（8）：88-92.Wang R Q，Huang X M，Fu W J，et al. Improvement of microstructure and properties of TA1 titanium sheet[J]. Heat Treatment of Metals，2014, 39（8）：88-92.
［5］Li H，Yang H，Zhan M，et al. The interactive effects of wrinkling and other defects in thin-walled tube NC bending process[J]. Journal of Materials Processing Technology，2007, (187-188): 502-507.
［6］Yong Bai，Ragnar T Igland，Torgeir Moan. Tube collapse under combined external pressure, tension and bending [J]. Marine Structure，1997，10(5): 389-410.
［7］Baudin S，Ray P，Mac Donald B J，et al. Development of a novel method of tube bending using finite element simulation[J]. Journal of Materials Processing Technology，2004, (153-154): 128-133.
［8］Li H，Yang H，Zhang Z Y，et al. ‘Size effect’ related bending formability of thin-walled aluminum alloy tube[J]. Chinese Journal of Aeronautics，2013，26(1): 230-241.
［9］Li H，Yang H. A study on multi-defect constrained bendability of thin-walled tube NC bending under different clearance[J]. Chinese Journal of Aeronautics，2011，24(1): 102-112.
［10］温彤，方刚，贾朋举，等. 高强度钢板力学性能参数对其拉深成形特性的影响[J]. 材料热处理技术，2011, (8): 25-27.Wen T, Fang G，Jia P J，et al. Effect of mechanical property parameters on drawing formability of high-strength steel sheet[J]. Hot Working Technology，2011,(8): 25-27.
［11］孙东继，林建平，胡巧声，等. 金属板料幂指型硬化模型应变强化系数K值研究[J]. 塑性工程学报，2009，16(1): 149-152.Sun D J, Lin J P, Hu Q S, et al. Research on strength coefficient in power hardening model of sheet metal[J]. Journal of Plasticity Engineering，2009，16(1): 149-152.
［12］黄华. 热绕弯成形Ti80钛合金汽车排气管弯头工艺和起皱研究[J].热加工工艺，2014,43(9)：130-132.Huang H. Research on wrinkling and process of hot bending of ti80 titanium alloy elbows for automobile exhaust tube[J].Hot Working Technology,2014,43(9)：130-132.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】