What is a hydraulic section rolling machine?

A hydraulic section rolling machine is a specialized machine driven by a hydraulic system. It is primarily used to bend metal sections (such as H-beams, channels, angles, and flat steel) or plates into curved, round, or other specific shapes through a rolling process. Its core features are the high precision, high torque, and stability of the hydraulic drive. It is suitable for cold or hot bending of heavy, large sections and is widely used in construction, shipbuilding, bridges, pressure vessels, and other fields.

1. Core Structure and Operating Principle

Main Components

Hydraulic System: Includes a hydraulic pump station, cylinders, and control valves, providing stable high-pressure oil to drive the machine.

Roller Assembly: Typically consists of three to four high-strength alloy rollers (upper, lower, and side rollers). Hydraulic cylinders adjust the roller spacing and pressure.

Frame and Base: Heavy-duty steel construction ensures the machine does not deform under high pressure.

Control System: PLC or CNC system precisely controls the bending radius, feed speed, and pressure.

Workflow

Feeding: The profile is fed between the upper and lower rollers.

Bending: A hydraulic cylinder pushes the upper or side rollers downward, gradually bending the profile between the rollers.

Forming: Through multiple rolls or continuous feeding, the profile is finally formed into the desired curvature or cylindrical shape.

2. Core Functions and Advantages

High Load Capacity

The hydraulic system can provide hundreds of tons of pressing force, suitable for cold-bending thick-walled profiles (such as steel plates over 20mm or large H-beams).

Precision Control

The hydraulic servo system, combined with CNC technology, achieves a bending accuracy of ±0.1mm, eliminating the "edge" and springback issues common with traditional mechanical plate rolling machines.

Versatility

By changing the roller dies, profiles of varying cross-sections (such as square tubes, round tubes, and I-beams) can be processed.

Both cold and hot bending (heating reduces the material's yield strength) are supported.

Automation and Efficiency

Automated feeding and continuous rolling significantly reduce manual intervention, making it suitable for mass production.

3. Typical Application Scenarios

Architectural Steel Structures: Bending H-beams for domes and curved beams.

Shipbuilding: Rolling hull ribs or pipes.

Energy Equipment: Processing wind turbine towers and pressure vessel cylinders.

Rail Transit: Manufacturing curved frames for subway cars.

4.Hydraulic Section Rolling Machine vs. Mechanical Section Rolling Machine