4 Batch Hydraulic Roller Sheet Metal Bending Machine is equipped with four-roll technology and rebending capability, which makes it possible to produce sheet metal tubes that can be welded by laser longitudinal seam welding machine. The metal workpiece is securely fixed between the upper and lower rollers, while the side rollers move vertically to form a bend. The bottom roll holds the metal profile or plate surface securely against the top roll, while the side roll is raised to form a pre-bend, minimizing the flat area at the edge of the workpiece. These features give the 4 batch roller sheet metal bending machine superior performance.