在机车车辆工厂中,各种直径的内圆柱面的堆焊工作量大,且多数内圆柱面位于非对称、不规则工件的各个部位上,采用工件旋转的水平位置堆焊有一定的困难,埋弧自动堆焊由于脱渣问题不能连续进行。以往,是采用工件固定、焊工沿内圆柱面圆周由下而上,辅以 In the locomotive and rolling stock factory, the welding workload of the inner cylindrical surfaces with various diameters is large, and most of the inner cylindrical surfaces are located on the various parts of the asymmetric and irregular workpieces. It is difficult to weld the workpiece horizontally with the workpiece rotated, Submerged arc automatic welding due to slag problems can not be carried out continuously. In the past, is the use of fixed parts, welders along the inner cylindrical surface from the bottom up, supplemented by