Mechanized bending machine with 3 roller
Mechanized bending machine with 3 roller
The machine operates by applying external forces—hydraulic or mechanical—to move the working rollers, which bend or roll the sheet into shape. Depending on the rotational movement and positional changes of differently shaped rollers, it can process elliptical, arc-shaped, and cylindrical workpieces.
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1.Introduction for Mechanized bending machine with 3 roller:
A roll forming machine is a processing device that bends sheet materials into desired shapes through the action of working rollers. It is capable of producing various components, including cylindrical and conical parts, making it essential equipment in metal fabrication.
The machine operates by applying external forces—hydraulic or mechanical—to move the working rollers, which bend or roll the sheet into shape. Depending on the rotational movement and positional changes of differently shaped rollers, it can process elliptical, arc-shaped, and cylindrical workpieces.
In the symmetrical plate rolling machine, the upper roller is actuated by hydraulic oil in cylinders positioned symmetrically between the two lower rollers, enabling vertical movement. It is driven by the main reducer's final gear, which also engages the gears of the two lower rollers to provide rolling torque. Flat, uniform metal plates pass through the three working rollers (two lower, one upper). Through downward pressure from the upper roller and rotational motion of the lower rollers, the plate undergoes repeated bending—inner layers compress, the middle remains neutral, and outer layers stretch—resulting in permanent plastic deformation. The plate is thus rolled into cylinders, cones, or partial sections.
A limitation of this hydraulic three-roller design is that sheet ends require pre-bending using separate equipment. This machine is suited for large-scale applications with plate thicknesses of 50mm or more. A row of fixed idler rollers added beneath the two lower rollers reduces their span, improving both workpiece accuracy and overall machine performance.
2.Technical parameter for Mechanized bending machine with 3 roller
3.Characters for Mechanized bending machine with 3 roller:
1. Classification: Plate rolling machines are divided into mechanical and hydraulic types.
2. Structure: The common three-roll symmetrical type features an upper roller moving vertically between two lower rollers via worm gear drive. The lower rollers rotate through reducer gear engagement to move the plate.
3. Working Principle: In hydraulic systems, high-pressure oil drives pistons to generate thrust and torque, bending the profile. Following the "three points form a circle" concept, when upper roller pressure exceeds the material's yield limit, permanent deformation occurs. The rolling process involves feeding, adjusting, and multiple pressing cycles with forward/reverse rotation.
4. Transmission System: Includes main drive (motor→reducer→gears→lower rollers) and auxiliary drive (separate motor for upper roller vertical movement via worm gear and screw).
5. Lubrication & Maintenance: Lubrication is manual or centralized, with regular maintenance required for reliable operation.
products faq
A 3-roller machine uses three rollers arranged in a pyramid or asymmetric configuration. It is simpler, more economical, and suitable for general fabrication. However, it typically requires the plate ends to be pre-bent separately or leaves a flat section on each end. A 4-roller machine adds a fourth (pinching) roller that securely clamps the plate edge, enabling pre-bending and rolling in a single pass with no flat ends—resulting in higher precision, faster operation, and less material waste, making it ideal for high-volume and precision work.
The machine can process a wide range of materials including carbon steel, stainless steel, aluminum, copper, and alloy plates. Thickness capacity varies by model: light-duty machines handle 2–12mm, medium-duty 12–40mm, and heavy-duty models can roll plates up to 120mm (or even 400mm on special configurations). Maximum width typically ranges from 1,000mm to 16,000mm. Capacity depends on material yield strength—higher strength steels require more force for the same thickness.
Yes. Many plate rolling machines support conical rolling. By adjusting the angle of the rollers relative to the plate feed, the machine can taper the curvature—forming truncated cones, tapered wind tower sections, and other conical shapes. This is achieved by angling the rollers or feeding the plate at a controlled angle relative to the roller axis.
Pre-bending is the process of bending the leading and trailing edges of the plate before full rolling. This ensures the plate ends form a continuous curve matching the rest of the cylinder—eliminating the flat sections that would otherwise need to be cut off or welded later. 4-roller machines perform pre-bending automatically in the same setup, while 3-roller machines may require a separate pre-bending attachment or a press brake. Proper pre-bending is critical for achieving full roundness and dimensional accuracy of the finished cylinder.