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  

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[1] 王濠 马彦[2] 宋鸿武[2] 徐勇[2] 张士宏[2] 李永辉 Yue Fengli;Wang Hao;Ma Yan;Song Hongwu;Xu Yong;Zhang Shihong;Li Yonghui(Institute of Automobile and Traffic,Shenyang Ligong University,Shenyang 110159,China;Shi-Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Henan Mengdian Group,Xinxiang 453621,China)

机构地区：[1]沈阳理工大学汽车与交通学院,辽宁沈阳110159 [2]中国科学院金属研究所师昌绪先进材料创新中心,辽宁沈阳110016 [3]河南孟电集团,河南新乡453621

出　　处：《锻压技术》2022年第7期80-85,共6页Forging & Stamping Technology

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.

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[金属学及工艺—金属压力加工]