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cross-sectional distortion behaviors of thin-walled rectangular tube in rotary-draw bending process

Transactions of Nonferrous Metals Society of China 2010年第3期20卷 484-489页

作者：赵刚要刘郁丽杨合卢彩红 College of Materials Science and Engineering State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical University

The cross-sectional distortion usually appears during rotary-draw bending process of thin-walled rectangular tube with small bending *** study the cross-sectional distortion of the tube,a three-dimensional finite-element model of the process was developed based on ABAQUS/Explicit code and its reliability was validated by ***,the cross-sectional distortion behaviors of the tube were *** results show that a zone of larger circumferential stress appears on the tube when bending angle reaches 30°.And in the larger circumferential stress zone,the sagging phenomenon is produced *** maximum cross-sectional distortion is located in the larger circumferential stress zone and the angle between the plane of maximum cross-sectional distortion and the bending reference plane is about 50°.The position of the maximum cross-sectional distortion keeps almost unchanged with the variation of the clearances between dies and tube.

关键词： thin-walled rectangular tube aluminum alloy 3A21 rotary-draw bending cross-sectional distortion die clearance

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Influence of Geometry Parameters on the Section distortion of Thin-Walled Rectangular Tube during Rotary Bending

Influence of Geometry Parameters on the Section Distortion o...

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2011工程机械与车辆工程新进展国际学术会议

作者： Ai Chenchen Yu Haiyan School of Automotive Engineering Tongji University Shanghai 201804 China

＜正＞cross-sectional distortion and the change of bending angle were the mainly forming defects during rotary bending of thin-walled rectangular *** this work,the thin-walled rectangular aluminum tube was discussed and a FE model was ***,the analysis of the process was carried out and the influence of the bending angle on the springback angle,and the influence of geometry parameters on the thickness and distortion were *** results show that the springback angle decreases when the bending angle was reduced,and the thickness reduction and cross-sectional distortion increase when the tube height was increased.

关键词： Thin-walled rectangular tube Rotary bending cross-sectional distortion Springback Numerical simulation

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