Flat Bar Ring Forming Welding Integrated Machine The machine completes feeding, ring forming, end trimming, clamping, flash butt welding and automatic unloading integrally. Servo feeding: Traction rollers grip flat bar and feed with fixed length; Roll bending: Multiple forming rollers cold-bend straight flat bar into full circle gradually; End trimming & clamping: Two ends of ring are cut flat and aligned tightly by copper clamps; Flash butt welding: Low voltage & high