Transactions of Materials and Heat Treatment

Title：Influence of deformation stress on bending springback angle

Authors： Zhao Maoyu Hao Mengyu Guo Hongyu Liu Yuanze Huang Bo

Unit： Hefei University An Hui Jiang Huai Fuzhen Car Body Equipment Company Limited

KeyWords： springback prediction model springback angle relative bending radius tangential stress radial stress

ClassificationCode：TG386

year,vol(issue):pagenumber：2019,44(3):24-28

Abstract：

Based on the modified Chaboche springback prediction model, springback angles α of V-shaped bending under different radius r were calculated, and the relationship between springback angle and relative bending radius r/t was analyzed. Through bending experiments, when the punch radius r=1-8 mm, springback angle α of bending was measured, respectively, and the springback angles of theoretical calculation and experimental measurement were compared to verify the Chaboche prediction model. On this basis, the tangential stress and radial stress of the inner and outer zone of bending fillet deformation for DP600 steel plate were calculated, and the influences of the tangential stress σθ and the radial stress σr on the bending fillet deformation were studied. Furthermore, the relationships between r, α and σθ, σr were analyzed, and the mathematical model of the relationship between the independent variable of bending degree and springback was established. The results show that the larger bending r/t, the greater the bending angle. Finally, the factors affecting the springback are analyzed, and the measures controlling the springback are put forward

Funds：

赵茂俞（1969-）,男,博士,副教授，E-mail：chhmyzhao@126.com

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