Working Principle

◇ The steel plate passes between the upper roller (one roller) and the lower roller (an elastic roller). Under the compressive force of the upper roller, the elastic layer of the lower roller deforms into a concave shape, thereby inducing the steel plate to bend and achieve the desired curvature.
◇ The machine's capacity and efficiency are determined by its specific structural configuration and control mechanisms.

Safety Operation Rules
◇ The upper roller of the plate rolling machine executes vertical lifting movements, driven by the hydraulic oil acting on the piston within a hydraulic cylinder, positioned symmetrically between the two lower rollers. The two lower rollers perform rotational movements—providing the necessary torque for rolling the plate material—driven by the final-stage gears of the main reducer engaging with the roller gears.

◇ In this plate rolling machine, a flat, ductile metal plate passes between the equipment's three working rollers (two lower rollers and one upper roller). Through the downward pressure of the upper roller and the rotational motion of the lower rollers, the metal plate undergoes multiple passes of continuous bending, resulting in permanent plastic deformation and forming the required cylindrical shells, conical shells, or sections thereof.

Structural Features and Design
◇ The two-roller design is characterized by high product precision, the absence of unbent "residual straight edges," and high production efficiency. The maximum circularity error is less than 0.5 mm, and peak efficiency can reach up to 400 units per hour.

◇ The two-roller CNC hydraulic plate rolling machine features two rollers: an upper roller and a lower roller. The lower roller acts as the flexible, active roller; it is driven by an electric motor via a reducer and coupling, and its vertical ascent and descent are controlled by a hydraulic unit. The upper roller acts as the rigid, passive roller and is fixedly mounted to the machine frame. When the lower roller rises to make contact with the upper roller, the upper roller begins to rotate in tandem with the lower roller. As the ductile metal plate passes between the upper and lower rollers, it is rolled into the desired cylindrical shape. Once the rolling process is complete, the lower roller is hydraulically lowered, the roller locking head is opened, and the finished product can be removed.

Analysis of the Rolling Process
◇ A three-roller machine typically requires four distinct stages—pre-bending, centering, circular rolling, and circular correction—to complete the process. In contrast, the hydraulic automatic two-roller plate rolling machine fundamentally alters this rolling methodology; it eliminates the aforementioned sequential stages, allowing for the entire shape to be formed in a single pass. In a two-roll machine, the upper roll is rigid while the lower roll is flexible; consequently, under the compressive force of the upper roll, the lower roll undergoes a certain degree of radial concave deformation. When a steel plate is fed between the upper and lower rolls, the counter-rotating action of the two rolls shapes it into a cylinder. From a microscopic perspective, the resulting cylinder is, in reality, composed of an infinite series of minute circular arcs.