摘要
真空室焊接部件在焊接过程中会产生较大的焊接变形,采用合理的焊接顺序及施加外部性约束可以在焊接过程中控制焊接变形.根据固有应变理论给出了不同焊接接头固有应变的计算方法及应变在软件中的施加方法.对真空室PS1段的四种焊接方案在无外部约束时的变形情况进行研究,根据无外部约束时PS1段的变形情况,确定了最优焊接顺序方案,制定了外部约束施加方法,并对有外部约束时PS1段的焊接变形进行计算.结果表明,不同的焊接顺序其变形量不同,施加外部约束能够使焊接变形量明显减少,为实际加工生产提供了理论参考依据.
Large welding deformation usually forms in vacuum vessel welded components,and it can be controlled by taking reasonable welding sequence and providing an external constraint during welding. A calculation method on inherent strain of various welded joints and a strain application method in software are presented by inherent strain theory. The deformation situations on four welding schemes of PS1 segment without external constraint are studied. An application method of external constraint is developed and the best welding sequence is identified by deformation conditions of PS1 segment without external constraint. The welding deformation of PS1 segment with external constraint is calculated. The results show that the welding deformation is different under different welding sequences,and applying external constraint can significantly reduce the altitude of welding deformation,which provides theoretical references for the actual production.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2017年第12期51-56,共6页
Transactions of The China Welding Institution
基金
国际热核聚变实验堆(ITER)计划专项资助项目(2015GB107003)
关键词
焊接变形
固有应变
焊接顺序
外部约束
welding deformation
inherent strain
welding sequence
external constraint
