The equipment features a four-roll structure, with the upper roll serving as the main drive. It provides torque for rolling sheets by meshing with the output gears of the reducer. The lower roll performs vertical lifting movements, powered by hydraulic oil acting on the piston within the hydraulic cylinder, enabling sheet clamping for hydraulic transmission. On both sides of the lower roll are side rolls that move in an inclined motion along the machine frame guide rails, powered by screw-nut worm gear transmission. The machine's advantage lies in the ability to pre-bend sheet ends and roll them into circles all on a single unit.