基于压边力的差厚拼焊板U形件回弹及控制  

Effect of blank holding force on springback in U-shape bending of tailor-welded blanks

作　　者：姜银方[1] 李路娜[1] 汪建敏[1] 朱元右[2] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013 [2]南京工程学院机械系,江苏南京210013

出　　处：《江苏大学学报（自然科学版）》2007年第5期397-400,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：江苏省高校自然科学基金资助项目(05KJD460044);国家自然科学基金资助项目(50475125)

摘　　要：通过试验和仿真,对具有纵向焊缝的拼焊板在不同压边力作用下的弯曲回弹特性进行研究,并与光板进行对比.研究拼焊板回弹机制,考察压边力分布对拼焊板回弹的影响及拼焊板回弹与焊缝移动的关系.结果表明,拼焊板及其光板回弹都随着压边力增加先增加,后明显减小;压边力较小时,拼焊板的回弹介于对应的两光板之间,随着压边力增加,拼焊板的回弹量在对应的光板之上.总压边力的增大,带来双重效应,一方面随总压边力的增大拼焊板回弹降低,另一方面随总压边力的增大拼焊板焊缝移动增加.总压边力不变,通过调整压边力分布,消除焊缝移动,同时回弹也达到最小值.Through experiments and simulations, springback characteristic of tailor-welded blanks （TWBs） with longitudinal welding line is investigated on different blank holding force （BHF）, and it is compared with that of non-welded blanks. The investigations include mechanism of TWBs＇ springback, influence of distribution of BHF on TWBs＇ springback and the relation between TWBs＇ springback and welded-line movement. The results show that with the increase of BHF, TWBs＇ springback increases first, and then tends to decrease gradually, which is of the same tendency as normal blanks. When BHF is small, TWBs＇springback is in the midst of that of non-welded blanks. With the increase of BHF, TWBs＇ springback is the biggest among them. Increase of total BHF causes two-sided effects. On the one hand TWBs＇ springback decreases with the increase of BHF; on the other hand welded-line movement in- creases with the increase of total BHF on TWBs. In the condition of immovable total BHF, through adjusting BHF＇s distribution welded-line movement is eliminated ＇and springback reaches to the minimum.

关 键 词：拼焊板 压边力 焊缝移动 弯曲回弹 

分 类 号：TG386[金属学及工艺—金属压力加工]