HOGI CNC 4-Roller Plate Roll Forming Machine

HOGI Full Servo Motor cnc 4-roll plate bending machine 

Combination of roll forming and welding machine in one system

The latest generation of hydraulic CNC 4-roll plate rolling machines has moved beyond the realm of simple “mechanical rolling.” The current state-of-the-art models focus primarily on digitalization, eco-friendly hybrid electric drives, and deep integration with fully automated, unmanned production lines (including loading/unloading robots and welding lines).

I. Latest Core Technology Trends at HOGI
1. Power Revolution: Hybrid Power and “Direct Electric Drive (E-Drive)”
• Traditional Approach: Full hydraulic drive (hydraulic motors drive the main roll, while hydraulic cylinders control vertical movement).
• Latest Technology: Hydraulic movement is used for the bending side rollers (ensuring absolute rigidity and powerful output force), while the main roller rotation employs fully electric/servo direct drive.
• Advantages: Significantly increased rotation speed (up to 10 m/min), energy consumption reduced by 30%–35%, extremely quiet operation, and faster, more precise braking torque response.
2. Software and AI: Intelligent Springback Compensation and Automatic Programming
• Traditional Approach: Requires an experienced “master craftsman” to repeatedly adjust the side roll height based on experience to compensate for the springback of the metal sheet.
• Latest Technology: State-of-the-art CNC systems (equipped with high-precision digital encoders and pressure sensors) feature built-in material databases and intelligent springback compensation algorithms. Operators simply input the sheet material, thickness, and target diameter, and the CNC system automatically calculates the multi-step rolling path and executes it.
3. Configuration Evolution: From Horizontal to “Vertical”
• To address specific industries (such as ultra-large-diameter thin-walled storage tanks and aerospace spacecraft hulls), the market has introduced the latest vertical CNC 4-roll plate rolling machines. Vertical rolling completely eliminates local sagging and deformation caused by the self-weight of heavy industrial components, making it highly suitable for the floor layout of modern smart factories.
4. Integration with Industry 4.0 and IIoT (Industrial Internet of Things)
• The latest models generally support Ethernet or 5G connectivity and feature remote diagnostics, predictive maintenance, and real-time production data upload capabilities. They are no longer isolated machines but can function as part of an automated flexible manufacturing system (FMS), integrating with loading robots, automatic centering systems, vacuum grippers, welding machines, and other equipment.

HOGI CNC 4-roll plate rolling machine is currently the most efficient and precise “flagship equipment” in the field of metal sheet forming. Compared to traditional 3-roll plate rolling machines, its greatest core advantage lies in “single-load, single-pass forming,” and its ability to minimize straight edges (unbendable corners) to the utmost degree.

Key Advantages:

1. Exceptional pre-bending capability, ultra-short straight edges

After rolling with a traditional three-roll machine, long “straight edges” often remain at both ends of the sheet. The four-roll plate rolling machine uses the lower roll to clamp the sheet while the side rolls bend it directly upward, typically limiting the straight edge length to within 1.5 times the sheet thickness. This significantly saves raw materials and reduces subsequent grinding time.

2. Safe and Efficient (Single-Pass Loading, No Need to Flip the Sheet)

Throughout the rolling process, the sheet is firmly clamped between the upper and lower rolls, ensuring absolutely no slippage or misalignment. Furthermore, unlike three-roll machines, there is no need to retract the sheet, flip it, and re-feed it. The left and right side rolls can be raised and lowered independently, allowing both ends to be pre-bent and the entire sheet rolled into a circle in a single pass.

3. High Automation and CNC Control

When paired with a CNC system (such as high-end CNC or intelligent NC), the operator simply inputs the sheet material, thickness, width, and target diameter on the touchscreen, and the system automatically generates a multi-step rolling program. Whether producing cylinders, cones, ellipses, or multi-segment arcs, the machine can precisely replicate the shapes, making it ideal for large-scale standardized production.

How are the four rolls divided in function? (Working Principle)

The structure of a 4-roll plate rolling machine is highly scientific, with each of the four rolls performing a specific function:

• Top Roll: Fixed in position (some high-end models allow for fine adjustment), it is typically the drive roll, providing torque to rotate the sheet.

• Bottom Roll: Capable of vertical movement. Its primary task is to lift upward, working in conjunction with the top roll to firmly clamp the sheet metal.

• Side Rolls: Located on either side of the bottom roll, they move up and down along linear or curved tracks. They are the key components responsible for actually “bending” the sheet metal; by adjusting their height and angle, they determine the radius and taper of the rolled curve.

HOGI specializes in the production of customized automatic rolling equipment, intelligent welding equipment, and customized processing production lines.

HOGI  CNC Hydraulic  4-roller Plate Rolling Machine

Main technical parameters