锻压技术

基于响应面法的大曲率半径TC4钛合金板材零件冲击液压成形回弹实验研究

英文标题：Experiment study on springback of TC4 titanium alloy sheet part with large curvature radius by impact hydroforming based on response surface method

作者：岳峰丽王濠马彦宋鸿武徐勇张士宏李永辉

单位：沈阳理工大学中国科学院金属研究所河南孟电集团

关键词：TC4钛合金板材冲击液压成形回弹响应面法

分类号：TG386

出版年,卷(期):页码：2022,47(7):80-85

摘要：

以大曲率半径TC4钛合金板材零件为研究对象，依照响应面法设计实验，对零件进行冲击液压成形回弹实验研究，制定了用于描述大曲率半径零件回弹的评价指标，获得不同工艺参数下TC4钛合金板材的回弹量。研究了气压、压边力以及不同曲率半径模具对TC4钛合金板材冲击液压成形回弹量的影响规律，并建立了回弹量的响应模型，得到了最佳工艺参数组合。结果表明，相比于准静态成形，冲击液压成形能够显著减小钛合金板材零件的回弹量。同时发现，回弹量随着气压和模具曲率半径的增加而减小，压边力对回弹量的影响不明显。当气压超过一定值时出现负回弹，而且模具的曲率半径越大，负回弹的绝对值越大，压边力越大，负回弹的绝对值越小。

For TC4 titanium alloy sheet part with large curvature radius, the experiment was designed based on the response surface method and the impact hydroforming springback experiment study on parts was carried out. Then, the evaluation index used to describe the springback of parts with large curvature radius was developed, and the springback amount of TC4 titanium alloy sheet under different process parameters was obtained. Furthermore, the influence laws of air pressure, blank holder force and dies with different curvature radius on the springback amount of TC4 titanium alloy sheet in impact hydroforming were studied, and the response model of springback amount was established to obtain the optimal process parameters combination. The results show that compared with quasi-static forming, the impact hydroforming can significantly reduce the springback amount of titanium alloy sheet parts. At the same time, it is found that the springback amount decreases with the increasing of air pressure and curvature radius of die, and the influence of blank holder force on the springback amount is not obvious. In addition, the negative springback occurs when the air pressure exceeds a certain value, and the greater the curvature radius of die is, the greater the absolute value of negative springback is, but the greater the blank holder force is, the smaller the absolute value of negative springback is.

基金项目：

作者简介：岳峰丽（1970-），女，硕士，副教授 E-mail：462627600@qq.com 通信作者：马彦（1983-），男，博士，助理研究员 E-mail：yma@imr.ac.cn

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