This model is a fast rolling welding machine specially developed for the vibration of rising core molds, dual station small core molds, and radial extrusion. It has 9 longitudinal bars and a welding speed of up to 40R.P.M. It can complete the welding of one steel cage in 1-2 minutes, with firm welding and no need to cut the steel bar head. It has a secondary diameter changing function and has now become a supporting rolling welding machine for pipe manufacturers of the above three processes.