What Is Plate Rolling Machine?

A plate rolling machine is mechanical equipment used to bend sheets into various shapes, widely used in metalworking, shipbuilding, boiler manufacturing, aerospace, hydropower, chemical, and machinery manufacturing industries. Its main function is to bend sheets into O-shaped, U-shaped, or multi-segment R shapes through continuous three-point bending.

CNC hydraulic plate rolling machines are high-precision rolling equipment widely used in the bending and forming of metal sheets. They use CNC technology for control and are characterized by simple operation, high accuracy, and strong adaptability.

Plate Rolling Machine

Types of CNC Plate Rolling Machines

Three-Roll Plate Rolling Machine

This type of plate rolling machine is divided into symmetric and asymmetric types. The symmetric three-roll plate rolling machine has a compact structure, lightweight, easy manufacturing and maintenance, but leaves a larger straight edge. It relies on the vertical lift of the upper roll and the rotation of the lower roll to achieve rolling. The hydraulic three-roll plate rolling machine allows the upper roll to move vertically and the lower roll to rotate, providing torque for rolling through the output gears of the reducer.

In the asymmetric three-roll plate rolling machine, the upper roll is above the lower roll, and the other roll on the side is called the side roll. Both upper and lower rolls are driven by the same motor. The lower roll can be adjusted up and down, with the maximum adjustment distance approximately equal to the maximum thickness of the steel plate that can be bent. The side roll is passive and can be adjusted obliquely.

During bending, the plate is fed between the upper and lower rolls, then the lower roll is adjusted to press the plate tightly, creating friction. By adjusting the side roll’s position, the plate bends when the upper and lower rolls rotate.

The advantage of the asymmetric three-roll plate rolling machine is that it can bend the edges of the plate, reducing the length of the remaining straight edge significantly, to less than twice the thickness of the plate. Although the plate between the side roll and the lower roll does not bend, flipping the plate after removal from the machine completes the bending process.

Four-Roll Plate Rolling Machine

The working principle involves rotational bending deformation to achieve plate rolling. Four-roll plate rolling machines are divided into symmetric and asymmetric types. Comprising an upper roll, lower roll, side rolls, and a supporting roll, it is similar to the asymmetric three-roll machine but adds an extra side roll. This additional side roll overcomes the need for flipping the plate in the asymmetric three-roll machine. The side and supporting rolls can move linearly or in an arc to adjust the rolling curvature radius.

This type of plate rolling machine is widely used in petroleum, chemical, cement, boiler, shipbuilding, aerospace, water conservancy, and transmission tower equipment.

Plate rolling machines, as important metal sheet processing equipment, have broad application prospects and market demand. With continuous technological advancements and expanding application fields, plate rolling machines will play an increasingly significant role in the future.

The four-roll plate rolling machine can also be subdivided by structure type, transmission method, and other criteria. Various types of four-roll plate rolling machines allow them to better adapt to different production needs and application scenarios.

For example, based on structure type, four-roll plate rolling machines can be divided into C-type and H-type, each suitable for different specifications and materials of metal plates. By transmission method, four-roll plate rolling machines can be classified as mechanical, hydraulic, and CNC types. Based on the equipped numerical control system, they can be divided into NC and CNC four-roll plate rolling machines. CNC four-roll plate rolling machines can achieve automation and high-precision operations, allowing programmable settings and complex rolling patterns, making them ideal for high-precision and high-volume production environments.

Additionally, there is the high-precision CNC-EVO plate rolling machine. This machine uses a unique core algorithm to perfectly address issues common in traditional rolling equipment, such as misalignment, deformation, and large errors during the rolling process. The quality of the rolled products meets or exceeds the standards of conventional machines in the industry.

Types of CNC Plate Rolling Machines
Types of CNC Plate Rolling Machines
Types of CNC Plate Rolling Machines

The Working Principle Of CNC Hydraulic Plate Rolling Machine

The CNC hydraulic plate rolling machine is mainly composed of a base, a workbench, a slider, a main oil cylinder, a side cylinder, a guide rail, an electrical system, and other parts. Among them, the base and workbench are the supporting parts of the entire equipment, the slider is used to clamp the workpiece, the main oil cylinder and side cylinder are the power sources to achieve the up and down and left and right movement of the slider, the guide rail is the guiding device to ensure the movement of the slider, and the electrical system is the core part that controls the operation of the entire equipment.

Three-Roll Plate Rolling Machine

Structure:

  • Upper and lower rolls: Important components made of forged high-quality carbon steel.
  • Frame: Consists of left and right frames, with lower roll bearings installed on the frame. Inside the frame, a square thread screw is connected to the upper roll bearings at both ends.
  • Reducer: Uses a hard-tooth surface reducer installed on the frame with a spacer.
  • Hydraulic System: The upper roll moves vertically through the action of hydraulic oil in the cylinder.

Working Principle:

  • Utilizes the principle of three-point fixed circle for rolling different radii. The upper roll, located centrally between two lower rolls, moves vertically by rotating the screws at both ends. The lower roll provides rotational drive through the reducer’s output gears, which mesh with the gears on the lower rolls, supplying power for rolling steel plates.

Four-Roll Plate Rolling Machine

Structure:

  • Rollers: Comprising upper, lower, side, and supporting rollers, with the upper roll as the main drive and fixed position. The lower roll is hydraulically driven to move vertically.
  • Frame: Includes a base, tilting side frame, and fixed side frame.
  • Drive Mechanism: The upper roll engages with the upper gear through the reducer’s output gear, providing torque for rolling. The lower roll moves vertically driven by hydraulic oil in the cylinder.
  • Hydraulic System: Drives the lower roll lifting device and the tilting device.

Working Principle:

  • The four-roll plate rolling machine uses friction and compression between the four rolls to gradually bend the metal sheet into the desired shape. The upper roll remains fixed while the lower roll moves upward to clamp the steel sheet. The side rolls move linearly or in an arc toward the upper roll to adjust the rolling curvature radius.

Both three-roll and four-roll plate rolling machines use the three-point fixed circle principle for rolling different radii, but their roller movements and structural designs differ.

Three-Roll Plate Rolling Machines vs. Four-Roll Plate Rolling Machines

Three-Roll Plate Rolling Machine Is More Economical And Practical

The price of a three-roller plate rolling machine is lower than that of a four-roller plate rolling machine. It features high rigidity and stability, capable of withstanding substantial pressure. The three-roller plate rolling machine boasts mature manufacturing technology, a simple structure, easy maintenance, and is economical and practical.

Four-Roll Plate Rolling Machine Is More Efficient

The four-roller plate rolling machine offers higher rolling precision and smaller straight edges, allowing for quick plate rolling operations, making it suitable for batch production. Additionally, the four-roller plate rolling machine can directly pre-bend the ends of the plate without other equipment, resulting in smaller remaining straight edges. This not only improves the quality of the workpiece but also enhances production efficiency.

Production Cost Of The Four-Roll Plate Rolling Machine Is Lower

The four-roller plate rolling machine uses multiple sets of rollers for continuous rolling, efficiently processing large quantities of metal plates and reducing production costs. In contrast, although the three-roller plate rolling machine is cheaper, it is time-consuming to roll, produces products with straight edges, and has average processing precision.

 Four-Roll Plate Rolling Machine Is More Compact

With the application of a hydraulic system, the four-roller plate rolling machine is smaller in size, enabling efficient operation in limited spaces.

Four-Roll Plate Rolling Machine Is More Precise

The four-roller plate rolling machine uses an electrical centralized control system, making operation simple and highly automated. This enhances the efficiency and precision of the equipment during production.

Four-Roll Plate Rolling Machine Has Broader Adaptability

The four-roller plate rolling machine can also perform certain leveling and shaping tasks on metal plates. This broadens the application range of the equipment, making it more versatile.

Comparison Of Maintenance Complexity

The symmetric three-roller plate rolling machine has a simple structure, easy operation, and low maintenance costs. However, the asymmetric three-roller plate rolling machine, with its asymmetrical roller arrangement, has a more complex structure, leading to higher maintenance and repair costs. The four-roller plate rolling machine has a relatively simple structural design and features lubrication-free bearings, reducing maintenance costs and complexity.

The CNC Trend Of Hydraulic Sheet Metal Guillotine Shearing Machine

Hydraulic shearing machine is one of the commonly used equipment in industrial manufacturing, mainly used for cutting metal sheets. With the continuous development of technology, the CNC trend of hydraulic sheet metal guillotine shearing machine is becoming increasingly apparent.

Firstly, the CNC control of hydraulic sheet metal guillotine shearing machine can improve production efficiency. Traditional hydraulic sheet metal guillotine shearing machine require manual operation, which is inefficient and prone to errors. The CNC hydraulic shearing machine can be controlled by computer to achieve automated operation, greatly improving production efficiency.

Secondly, the CNC control of hydraulic sheet metal guillotine shearing machine can improve machining accuracy. Traditional hydraulic sheet metal guillotine shearing machine often have unstable machining accuracy due to manual operation. The CNC hydraulic shearing machine can achieve high-precision processing through precise computer control, improving product quality and competitiveness.

In addition, the CNC control of hydraulic sheet metal guillotine shearing machine can also improve the reliability and safety of the equipment. Traditional hydraulic sheet metal guillotine shearing machine are prone to malfunctions and pose safety hazards during operation. The CNC hydraulic shearing machine can be controlled by computer to achieve automatic monitoring and maintenance of the equipment, improving its reliability and safety.

In short, the CNC trend of hydraulic sheet metal guillotine shearing machine is an inevitable trend in the development of industrial manufacturing. In the future, with the continuous development of technology, the degree of CNC control of hydraulic sheet metal guillotine shearing machine will be increasingly high, bringing more convenience and benefits to industrial manufacturing.

CNC Hydraulic Plate Rolling Machine



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