Transactions of Materials and Heat Treatment

Title：Influence of forming temperature on springback and cross-section distortion for aluminum alloy profile during extrusion-bending integration forming

Authors： Xu Liang Xu Congchang Li Luoxing

Unit：

KeyWords：

ClassificationCode：TG376

year,vol(issue):pagenumber：2021,46(9):154-162

Abstract：

The influence laws and mechanism of forming temperature on springback and cross-section distortion of 6063 aluminum alloy square tube profile formed by extrusion-bending integration forming process and mechanism were explored by the method combining with experiment and simulation, and the comparative analysis were conducted by comparing with cold stretch-bending process. The results show that the main factor affecting the springback is the ratio of yield strength to elastic modulus, the greater the ratio of yield strength to elastic modulus, the greater the springback of the profile, and vice versa. In the extrusion-bending process, the material is still in a warm state after extruded from the mold, the ratio of the yield strength to the elastic modulus is low, the springback of the extrusion-bending profile is about 50% and 75% less than that of the cold stretch-bending profile of T4 state and T6 state respectively. In addition, the cross-sectional distortion is dominated by the external tensile stress, the uneven flow of the external material causes the cross-section distortion of the profile, while the deformation of the inner surface of the profile under the rigid support of the bending mold is relatively small. In the extrusion-bending integrated forming process, the uniform deformation ability of the material at high temperature is good, and with a traction force of 0.15 kN, the cross-section distortion at the center position of the profile is reduced by about 85% and 77% respectively compared with that of T4 state and T6 state.

Funds：

国家自然科学基金资助项目（U20A20275）

：许亮（1990-），男，博士研究生 E-mail：xuliang9010@126.com 通信作者：徐从昌（1989-），男，博士，助理研究员 E-mail：xuccae86@126.com

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