Roll welding machine is widely used in cast-in-place pile construction in large bridges, high-speed railway construction and other fields. Wire Cage welding machine is one of the most necessary equipment to produce reinforced concrete pipes. There is pushing style, another is the Pulling. Our company pipe cage welding machine is fully automatic operation, the whole production process only needs one person operation. Roll welding machine makes up of four systems: The Main rotary plate; Pushing wire Plate; Diameter changing structure; and Cooper welder, they are working, driven by the separate motor. The Variable Frequency speed control system regulated to make the spiral pitch, the angle of ball joint.