在船舶和其他金属结构的焊接中,有许多接缝的焊接受到各种条件的限制,不能采用机械化焊接,只能沿用手工双面焊工艺,先用手工进行俯位焊接,然后用碳弧气刨铲除焊缝根部再用手工仰焊封底。这样,不仅焊接技术要求高,而且生产效率低,劳动强度大。为改变这种惰况,正在采用一种手工单面焊接工艺。为此,对手工单面焊用的衬垫作了一些研究。经反 In the welding of ships and other metal structures, there are many seam welding conditions subject to a variety of restrictions, can not be used mechanized welding, handwork can only be followed by double-sided welding process, the first manual welding at the bow, and then carbon arc gas Excavating the root of the ground plane and then manually pick up the back cover. In this way, not only welding technology demanding, but also low productivity, labor-intensive. To change this inertia, a manual one-sided welding process is being used. For this reason, some studies have been made on the pads used for manual single-sided welding. After the anti