A CNC plate rolling machine is a universal forming machine designed to roll metal plates into cylindrical, arc shaped, or other desired shapes. Based on the “three point rounding” principle, it utilizes changes in relative position and rotation to continuously induce plastic deformation in metal sheets, forming them into predetermined shapes.
Among these machines, the 4 roll CNC plate rolling machine stands out for its advanced design and superior performance.
How the CNC 4 Rolls Plate Rolling Machine Works
The 4 rolls design offers significant advantages over traditional 3 roll systems. In this setup:
The top roll is fixed and serves as the main driving roll.
The bottom roll moves vertically, hydraulically pressing the plate against the top roll. The two side rolls move in linear or arc trajectories toward the top roll to control the curvature.
This configuration greatly reduces residual straight edges, improves roundness accuracy, and increases efficiency, making it ideal for large scale industrial production. Compared to 3 roll machines, the 4 roll system offers:
Better pre bending results
Higher rolling accuracy
Twice the processing efficiency in the same time span
Primapress CNC 4 Rolls Plate Rolling Machine – GJW12 25X2500
One of the most advanced models from Primapress Machinery Co., Ltd., the GJW12 25X2500 comes with fully automated CNC controls, strong hydraulic systems, and high precision rolling capabilities.
Specifications:
Plate Width: 2500 mm
Rolling Thickness: 3–25 mm
Yield Limit of Plate Material: 245 MPa
Minimum Rolling Diameter: Φ800 mm
Residual Edge After Pre bending: 1.5–2 × plate thickness
Pre bending Thickness: 20 mm
Precision Tolerance: ±1 mm
Synchronization Accuracy: ±0.2 mm
This machine allows single feeding and rolling, eliminating the need to turn the plate during pre bending and forming. It’s equipped with a hydraulic tilting bearing system, automatic leveling controls, and a balance mechanism on the rear of the top roll, making it easier to remove finished components.
Advanced Features of the CNC 4 Rolls Plate Rolling Machine
Hydraulic transmission for all lifting movements
Digital display and automatic leveling for precise control
PLC programmable control system
All in one pre bending and rolling operation
Optional configurations: top and side supports, cone rolling devices, feeding rollers, and more
Proper maintenance of CNC 4 rolls plate rolling machines is crucial for ensuring long service life, safe operation, and consistent product quality. Below, we outline essential care practices and highlight the most commonly worn components.
Structural and Functional Advantages
The 4 rolls structure brings unique advantages:
Top roll provides torque through motor and gearbox
Bottom roll uses hydraulic cylinders for vertical movement and material clamping
Side rolls follow guided tracks and are actuated via worm gear systems
This arrangement allows precise pre bending and rolling in a single setup, eliminating the need for plate repositioning. The digital CNC interface, touch screen control, and programmable memory enable operators to store up to 500 process parameters.
Additional Benefits
Real time fault diagnostics
EPS Electronic Balancing System for precise parallel roll movement
Forged and heat treated roll shafts for high durability
Dual mode (manual/auto) compatibility
Heavy duty, stress relieved frame structure
Thanks to these features, the CNC 4 roll plate rolling machine is ideal for rolling cylindrical, conical, multi radius, square, and custom shaped components.
Maintenance of CNC 4 Rolls Plate Rolling Machine
Strictly follow safety operation procedures during each use.
Lubricate as required, based on the lubrication chart. Use clean oil without sediments and follow the “timing, point, and quantity” principles.
Keep the machine clean, especially non painted parts, which should be protected with anti rust oil.
Regularly check electric motors and bearings, replace or refill lubrication oil as needed.
Inspect belts, control knobs, rods, and switches regularly. Replace worn out parts promptly.
Ensure power switches and control levers are in good working condition.
Lubricate and clean the machine 10 minutes before shutting down each day.
Only authorized personnel should operate the equipment.
By adhering to these practices, companies can prevent downtime and extend the service life of the machine.
Commonly Worn Parts and Causes of Failure
Even with the best designs, some parts are naturally subject to wear. Understanding them can help implement preventive measures:
Electric Motor – Common damage includes burnout due to overloading or poor ventilation.
Gearbox (Reducer) – It’s critical to transmission. If improperly used, it can produce abnormal noises or breakdowns.
Sliding Bearings (a.k.a. Composite Sleeves) – Located between the bottom roll and base or tilting frame. Typically made from wear resistant copper alloy, but heavy contact leads to gradual wear.
Electrical Control System – As a complex assembly of electronic parts, it is sensitive to voltage changes, overheating, or dust buildup.
Screws, Worm Shafts, Worm Gears, Nuts – These main drive components have high friction surfaces and should be lubricated monthly with grease to reduce wear.
Bearings and Housings – Including self aligning bearings and spherical bearings, these are critical but vulnerable components.
Whether you’re rolling wind towers, tanks, or custom enclosures, Primapress CNC plate rolling machines deliver precision, power, and reliability. For inquiries and pricing, feel free to contact us today！
Primapress also manufactures hydraulic 3 rolls and CNC 2 rolls plate rolling machines to meet various industry needs. Welcome to consult our expert team for the right solution for your project!
