A type work-piece has some features such as thin wall,dense space curve welded joint,easy to deform when heated,a high demand of gap and unfitness and so on.

• 根据某产品空间曲线焊缝壁薄、密集、受热易变形,对管间隙及错边量要求高的特点,对其结构及其受力受热情况,及弧焊变形机理进行了深入地研究,并提出了抑制其变形的“分段线性控制”策略。