Transactions of Materials and Heat Treatment

Title：Study on application of two-axis flexible roll bending technology for titanium alloy

Authors： Zhao Tao Li Xiaolong Du Chunfeng Lu Qidong Sun Minjie Lou Yifeng

Unit： Shanghai Spaceflight Precision Machinery Institute

KeyWords： titanium alloy cylindrical part two-axis flexible roll bending superelastic material bending springback

ClassificationCode：TG379

year,vol(issue):pagenumber：2022,47(2):83-87

Abstract：

Aiming at the problems of long straight-flange, unstable quality and long processing cycle that exist when titanium alloy cylindrical parts are formed by conventional roll bending process, for typical aerospace product, two-axis flexible roll bending process validation was conducted. The test results show that two-axis roll bending has strong forming ability without multi-pass roll bending, the straight-flange of part obtained is short, and the forming cycle of a titanium alloy cylindrical part is controlled within 1 min. Then, the application of superelastic material in two-axis flexible roll bending technology improves the forming accuracy of titanium alloy parts，and all the test parts obtained meet the requirements of forming technical indicators. Furthermore, the classical formula of bending springback is used to calculate the diameter of rigid roller during the two-axis flexible roll bending of titanium alloy, and the deviation between theoretical value and actual value of the curvature radius for the part inner surface obtained is within 0.7 mm. Thus, the two-axis flexible roll bending technology can realize cold forming of titanium alloy cylindrical part with high efficiency and high quality, and has a good prospect in engineering application.

Funds：

赵淘（1989-），男，硕士，高级工程师,E-mail：tonyzhao1009@163.com

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