Ⅱ级贮箱采用薄壁焊接结构,分布有六个法兰盘环形焊缝和三条纵向焊缝,对确保尺寸精度和形状精度起重要作用,因而相应地提高了技术要求。利用逐点挤压矫形法延展焊缝使之与焊缝收缩相抵消以消除变形。工艺参数的选择得当与否,对矫形有显著效果,而且在矫形的同时可改善焊接头的残余应力状态。 Class II tanks are thin-walled welded structures with six annular flange welds and three longitudinal welds distributed, which play an important role in ensuring dimensional precision and shape accuracy, thereby increasing the technical requirements accordingly. The use of point-by-point extrusion orthopedic extension of the weld so that the shrinkage of the weld offset to eliminate the deformation. The choice of process parameters properly or not, has a significant effect on orthopedic, but also in orthodontics can improve the residual stress state of the welding head.