A plate rolling machine is a type of forging equipment that bends metal or non-metal plates into cylinders, cones, spheres, or other curved shapes. Among various models, the four-roller plate rolling machine stands out for its efficiency, precision, and versatility in large-scale metal forming.
Structure and Working Principle
Structure
The four-roller plate rolling machine includes four main rollers: one upper roller, one lower roller, and two side rollers.
The upper roller acts as the primary drive. It connects to the main motor through a reducer and coupling, generating the torque needed to roll steel plates smoothly.
Meanwhile, the lower roller moves vertically under the action of hydraulic pressure. Hydraulic oil pushes the piston in the cylinder upward, allowing the lower roller to clamp the plate tightly and prevent slippage during bending.
Working Principle
Four-roller plate rolling machine is operating principle primarily relies on the rotation of upper and lower rolls, coupled with the coordinated action of side rolls, to gradually bend the metal sheet into the desired cylindrical or curved shape.
During operation, the upper and lower rolls, driven by a hydraulic system or mechanical device, rotate, and the friction between them propels the metal sheet forward. Simultaneously, the side rolls, controlled by the hydraulic or mechanical system, move upward or downward, applying lateral pressure to the sheet, gradually bending it to conform to the curved surfaces of the upper and lower rolls, ultimately forming the desired shape. Furthermore, support rolls provide auxiliary support, effectively preventing deformation and creases in the sheet during the rolling process, thereby ensuring high-quality rolling.
The position and speed of the four rollers (upper roll, lower roll, and two side rolls) of a four-roller plate rolling machine can be flexibly adjusted to meet specific processing requirements, enabling precise rolling of sheets of varying specifications and curvatures.
Thanks to its hydraulic drive system, the machine operates with high precision and stability. The synchronized movement of all rollers ensures uniform deformation across the entire length of the metal sheet, producing smooth and consistent results.
Six Key Advantages of Four-Roller Plate Rolling Machines
- Automatic Alignment, Convenient Operation: Equipped with an automatic alignment function, the four-roller plate rolling machine automatically aligns the metal sheet under the active push of the rear roller, eliminating the need for manual adjustments and improving processing efficiency and accuracy.
- Precise Clamping, Shorter Straight Edges: The clamping force of the upper and lower rollers is precisely controlled, ensuring stable sheet transport during the rolling process while effectively shortening the straight edge length and reducing subsequent processing effort.
- Stable Clamping, Consistent Positioning: Throughout the rolling process, the metal sheet is securely clamped between the upper and lower rollers, ensuring precise positioning during movement, preventing deviation or misalignment and improving product consistency.
- One-Stop Rolling, Higher Efficiency: The four-roller plate rolling machine can roll the entire barrel, including pre-bending at both ends. This process eliminates the need to flip the sheet or re-adjust the roll, significantly reducing processing time and improving production efficiency.
- Integrated Auxiliary Functions, Safe and Efficient: The machine features centralized auxiliary control functions, enabling intelligent coordination of key steps including sheet alignment, pre-bending, and rolling. This design not only enhances operational safety but also enables fast and precise pre-bending, effectively preventing damage to sheet edges and ensuring high-quality finished products.
- Flexible Forming:The machine easily forms conical, elliptical, or profiled components, making it ideal for producing complex shapes.
Conclusion
A four-roller plate rolling machine is a highly efficient and precise sheet metal forming machine. Its upper roller drives the process, the lower roller provides vertical clamping, and the side rollers adjust along diagonal directions to refine the bending angle.
By combining hydraulic precision with mechanical efficiency, the four-roller design ensures uniform bending, high productivity, and outstanding accuracy across the entire plate surface. Consequently, this equipment has become an essential tool in industries such as shipbuilding, pressure vessel manufacturing, and metal structure fabrication.