基于弹性反变形法的连接杆焊接变形控制

发布时间：2018-03-23 07:32

本文选题：焊接变形　切入点：弹性反变形工装　出处：《焊接学报》2015年12期 　论文类型：期刊论文

【摘要】：基于热-机耦合热弹塑性有限元理论,利用MARC有限元分析软件对连接杆的焊接变形进行数值模拟,并进行焊接试验.将数值模拟结果与试验结果进行比较,两者基本吻合,误差仅为4.8%,验证了有限元模型建立的准确性.在此基础上,自行设计了弹性反变形工装.对有反变形工装的连接杆进行数值模拟,并将最佳工艺参数应用于试验中,得到了理想的焊接样件.结果表明,当未采用反变形工装时,连接杆的最大焊接变形量为9.85 mm;当采用反变形工装且中间和两侧弯环的下压量分别为7,4 mm时,最大的焊接变形量减小至1.73 mm,降低了82.4%,有效的控制了焊接变形.
[Abstract]:Based on thermo-mechanical coupled thermoelastic-plastic finite element theory, MARC finite element analysis software is used to simulate welding deformation of connecting rod, and welding test is carried out. The error is only 4.8, which verifies the accuracy of establishing the finite element model. On this basis, the elastic reverse deformation tool is designed by ourselves. The connecting rod with reverse deformation is numerically simulated, and the optimum process parameters are applied to the test. An ideal welding sample is obtained. The results show that the maximum welding deformation of the connecting rod is 9.85 mm when the reverse deformation tool is not used, and when the pressure of the middle and both sides of the bending ring is 74mm, the maximum welding deformation of the connecting rod is 9.85 mm. The maximum welding deformation is reduced to 1.73 mm, 82.4 mm, and the welding deformation is effectively controlled.
【作者单位】：合肥工业大学材料科学与工程学院;中电科技集团第38研究所;
【基金】：安徽省自然科学基金资助项目(1308085JGD02) 中电科技集团产学研合作资助项目(12-271)
【分类号】：TG404

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