Transactions of Materials and Heat Treatment

Title：Numerical simulation and experimental research on the rotary bending of 6061 aluminium alloy tube

Authors： Wang Liuan Wang Ying Liu Zhongli Ma Fuye Guo Xunzhong

Unit： Nanjing University of Aeronautics and Astronautics Jiangsu Province Special Equipment Safety Supervision Inspection Institute

KeyWords： 6061 aluminum alloy S-shaped bending tube numerical simulation NC tube rotary bending

ClassificationCode：TG386

year,vol(issue):pagenumber：2015,40(5):60-66

Abstract：

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.

Funds：

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

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