锻压技术

钛合金两轴柔性滚弯技术应用研究

英文标题：Study on application of two-axis flexible roll bending technology for titanium alloy

作者：赵淘李晓龙杜春峰鹿启栋孙敏杰娄一峰

分类号：TG379

出版年,卷(期):页码：2022,47(2):83-87

摘要：

针对钛合金筒形件采用常规滚弯工艺成形时存在的直边长、质量不稳定、加工周期长等问题，选取典型航天产品进行钛合金两轴柔性滚弯工艺验证。试验结果表明：两轴柔性滚弯成形能力强，无需多次滚弯，且得到的工件直边短，单个钛合金筒形件成形周期可控制在1 min以内；两轴柔性滚弯技术中，超弹性材料的应用提高了钛合金成形精度，得到的试验件全部符合成形技术指标要求；经典弯曲回弹公式可用于计算钛合金两轴柔性滚弯时的刚性辊直径，得到的工件内表面曲率半径的理论值和实际值偏差在0.7 mm内。因此，两轴柔性滚弯技术可实现钛合金筒形件的高效率、高质量冷成形，具备很好的工程应用前景。

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.

基金项目：

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

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