拼焊板弯曲成形回弹规律的研究
Investigation on Springback Rules in Bending Forming of Tailor-welded Blanks
伍驭美，霍春梅，王梦寒
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作者单位：（重庆大学 机械工程学院，重庆 400044）
中文关键字：拼焊板；弯曲成形；回弹；有限元法；正交试验设计
英文关键字：tailor-welded blanks； bending forming； springback； FEM； orthogonal experiment design
中文摘要：采用正交试验设计与有限元仿真技术相结合的方法,对具有横向焊缝的拼焊板的回弹进行了研究。以U形件的弯曲成形过程为研究对象,分析了三个重要的因数厚度比、强度比和板宽对拼焊板回弹的影响。结果表明，拼焊板在成形过程中薄侧和厚侧的回弹存在着较大的差异，板的强度比对拼焊板薄侧的回弹影响最为显著，板的宽度和板的厚度比对拼焊板厚侧的回弹影响较显著,但这种趋势并不完全成线性。取模拟结果中的三组数据进行了实验验证，实测值与数值模拟值趋势一致。
英文摘要：Tailor-welded blanks with transverse welds were tested and simulated by the combinating orthogonal experiment design with finite element method. The influence of three important factors including thickness ratio,strength ratio and blank width on the springback of tailor-welded blanks were studied. Bending forming of U-shaped part is taken as a research object. The results show that the springback of thin blank and thick blank is obviously different. Strength ratio of blank play a important role in the springback of thin blank, while as for thick blank,infulence of blank width and strength ratio is remarkable，but this tendency is not linear. Three simulation results among these datas are validated. The trend of tested results and simulation results is consistent.