1. Definition and Structure: The four-roller plate bending machine is a high-precision bending equipment for metal plates. Its core consists of four parallel working rollers: the upper roller, the lower roller, and the left and right side rollers, arranged in a quadrilateral layout.Upper roller: Actively driven, providing torque, with a fixed position or capable of fine adjustment.Lower roller: vertically lifts and clamps the plate to prevent slipping.Side rollers (one on each side): They can move horizontally/tilt, controlling curvature, pre-bending the ends, and eliminating straight edges.Transmission and control: Hydraulic or CNC drive, equipped with reducer, coupling, and CNC system.II. Operating Principle (Three-Point Circle Fixing + Four-Roller Collaboration) Feed Clamping: The plate is placed between the upper and lower rollers, and the lower roller ascends to clamp it.End pre-bending (core advantage): The side rollers move forward to bend the ends of the plate, eliminating the need for turning and producing no obvious straight edges.Continuous rounding: The upper roller rotates to drive the plate, while the side rollers gradually feed it in, resulting in three-point force bending into an arc/cylinder.Rounding and shaping: Fine-tune the positions of each roller to correct roundness and ovality, achieving an accuracy of **±0.1mm**.Unloading: Lower the lower roller to remove the finished product.