The manipulator series equipment is one of the main process equipment for automatic welding of boilers, pressure vessels, pipes and metal structures. It can be matched with roller frames, positioners, turning machines, etc. to form an automatic welding system. Or large-diameter pipeline inside and outside longitudinal circumferential seam welding, spherical head seam welding, surfacing welding of the cylinder body and the inner wall of the head, surfacing welding of the opening and strengthening area of the head, etc. It can be matched with TIG, MIG/MAG, PAW, SAW and other welding processes.