锻压技术

6061 铝合金薄壁管绕弯成形数值模拟及实验研究

英文标题：Numerical simulation and experimental research on the rotary bending of 6061 aluminium alloy tube

作者：王刘安王颖刘忠利马福业郭训忠

分类号：TG386

出版年,卷(期):页码：2015,40(5):60-66

摘要：

通过单向拉伸试验获得6061-T6铝合金管（Φ50.8 mm×1 mm）的基本力学性能数据,拟合建立了材料的本构方程；对异型弯管的数控绕弯过程进行有限元模拟，研究了芯棒与管材间间隙值、芯棒伸出量、芯头个数对弯管成形质量的影响规律，分析发现，最优间隙值为1.05 mm，并获得了90°~ 100°弯管时两个弯曲段的回弹角和弯曲角关系曲线。模拟结果表明，第1次弯曲角为96°、第2次弯曲角为94.5°时可得到平行度较好的异型弯管。最后通过绕弯实验，将实验结果与仿真模拟进行对比，验证了模拟所得规律和材料模型的准确性。

The constitutive equation of material was built based on the basic mechanical properties of 6061-T6 aluminum alloy tube (Φ50.8 mm×1 mm) obtained by tensile test. The CNC rotary bending process of shaped bending tube was simulated numerically. The influences of the clearance between the mandrel and tube, mandrel extension and the number of core head on forming quality were studied. The result show that the most appropriate clearance value is 1.05 mm. The relationship curves between springback angles and bending angles of the two bending tube 90°-100° were gained. The simulated result shows that a better parallel precision of the shaped tube can be obtained when the first bending angle is 96° and the second bending angle is 94.5°. The accuracy of simulation and constitutive equations were verified by comparing the results of tests with simulations.

基金项目：

国家自然科学基金资助项目（51205196)；中国博士后科学基金面上资助项目(2013M531347); 江苏高校优势学科建设工程资助项目（PAPD)

王刘安（1990-），男，硕士研究生;通讯作者：郭训忠（1981-），男，博士，副教授

参考文献：

［1］Gu R J,Yang H,Zhan M,et al. Springback of thin-walled tube NC precision bending and its numerical simulation[J]. Transactions of Nonferrous Metals Society of China,2006,16(S):631-638.
［2］Zhan G,Liu Y L,Yang H,et al. Cross-sectional distortion behaviors of thin-walled rectangular tube in rotary-draw bending process[J]. Transactions of Nonferrous Metals Society of China,2010,20:484-489.
［3］田玉丽,杨合,李恒,等.6061-T4大直径薄壁管数控弯曲壁厚变化实验研究[J]. 材料科学与工艺，2012，20(2): 23-29.Tian Y L,Yang H,Li H,et al. Experimental study on wall thickness variation in NC bending of 6061-T4 large diameter thin-walled tubes[J]. Materials Science and Technology,2012,20(2):23-29.
［4］Zhang Z Y,Yang H,Li H,et al. Bending behaviors of large diameter thin-walled CP-Ti tube in rotary draw bending[J]. Progress in Natural Science,2011,（21）: 401-412.
［5］Tian S,Liu Y L,Yang H. Effects of geometrical parameters on wrinkling of thin-walled rectangular aluminum alloy wave-guide tubes in rotary-draw bending [J]. Chinese Journal of Aeronautics,2013,26(1): 311-317.
［6］Liu J,Yang H,Zhan M,et al. Accurate prediction of the profile of thick-walled titanium alloy tube in rotary-draw bending considering strength-differential effect [J]. Computational Materials Science,2012,60: 113-122.
［7］Paulsen F,Welo T,Sovik O P. A design method for rectangular hollow sections in bending[J]. Journal of Materials Processing Technology,2001,113: 699-704.
［8］杨银，闫晓东，王哲，等. 铝合金矩形管绕弯件尺寸精度的试验研究[J].材料科学与工艺，2014，22（1）：88-93.Yang Y,Yan X D,Wang Z,et al. Experimental research on geometric accuracy of bending parts for aluminum rectangular in rotary-draw bending[J]. Materials Science & Technology,2014,22（1）：88-93.
［9］Tao Z J,Yang H,et al. Coupled thermo-mechanical FE simulation of unloading cooling springback in NC heating bending of large diameter thin-walled commercial pure titanium tube [J]. Procedia Engineering,2014,81:2273-2279.
［10］赵刚要，刘郁丽，杨合. 芯棒伸出量对薄壁矩形管弯曲失稳起皱影响的数值模拟[J].中国机械工程，2006，17（Z1）：35-37.Zhao G Y,Liu Y L,Yang H. Numerical simulation of influence of mandrel on wrinkling in bending of thin-walled rectangular tube [J]. China Mechanical Engineering,2006，17（Z1）：35-37.
［11］Zhao K M,Lee J K. Finite element analysis of the three-point bending of sheet metals[J]. Journal of Material Processing Technology,2002,122: 6-11.
［12］鄂大辛，宁汝新，李延民，等. 弯管壁厚减薄与材料特性关系的试验研究[J].材料科学与工艺，2008，16（2）：200-203.E D X,Ning R X,Li Y M,et al. Experimental study on the wall thickness thinning of the curved tube affected by material property[J]. Materials Science and Technology,2008，16（2）：200-203.
［13］岳永保，杨合，詹梅，等.薄壁管小弯曲半径数控弯曲壁厚减薄实验研究[J].锻压技术，2007，32（5）：58-62.Yue Y B,Yang H,Zhan M,et al. Experimental study on thinning of thin-walled tube NC bending process with small bending radius [J]. Forging & Stamping Technology,2007，32（5）：58-62.
［14］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 Y B. Numerical Simulation and Experimental Study on Titanium Alloy Tube NC Bending Process [D]. Xi′an: Northwestern Polytechnical University,2009.
［15］Li H,Yang H,Zhan M,et al. Role of mandrel in NC precision bending process of thin-walled tube [J]. International Journal of Machine Tools & Manufacturing,2007,471: 1164-1175.
［16］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 H. Research on Wrinkling in NC Bending of Thin-walled Tube in Muti-dies Constraints[D]. Xi′an: Northwestern Polytechnical University,2007.
［17］GB/T 228.1—2010，金属材料拉伸试验室温试验方法[S].
［18］吴建军. 板料成形性基础[M]. 西安: 西北工业大学出版社,2004.Wu J J. Foundation of Sheet Metal Formability [M].Xi′an: Northwestern Polytechnical University Press,2004.
［19］何文治. 航空制造工程手册[M]. 北京: 航空工业出版社,1992.He W Z. Aeronautical Manufacturing Engineering Handbook[M].Beijing: Aviation Industry Press,1992.
［20］张静静,杨合,詹梅,等．助推作用对大口径铝合金薄壁管数控弯曲壁厚减薄和回弹的影响[J].塑性工程学报,2008,15(1):60-65.Zhang J J,Yang H,Zhan M,et al. Effects of pressing die′s boosting function on wall thinning and springback in NC bending process of thin-walled tube with large diameter [J]. Journal of Plasticity Engineering,2008,15(1):60-65.

服务与反馈：

【文章下载】【加入收藏】