Close this search box.

Four-Roll Plate Rolling Machine: Principles and Operating Procedures

KRRASS four-roll plate rolling machine partial

The four-roll plate rolling machine consists of four rolls. The upper roll is the main drive and its position remains fixed, while the lower roll is raised and lowered by hydraulic cylinders at both ends. When the lower roll is raised, it can clamp the head of the plate with the upper roll, and the distance between the side rolls and the upper roll can be adjusted as needed to bend the ends of the plate. Then, the lower roll descends while the two side rolls rise, and the plate is bent and rolled into a cylindrical shape.

Any machine should be operated correctly according to the process requirements. Now let’s discuss the correct operating methods of the four-roll plate rolling machine. Generally, the preparation involves the following aspects:

1. Understand the machine's functions

The plate rolling machine is a commonly used forging and pressing equipment that can bend non-metallic plates into cones, spheres, cylinders, or other shapes. Its wide application includes manufacturing, boiler steam, chemical industry, non-metallic construction, and machinery fabrication.

2. Familiarize yourself with the working principle of the machine

The motion of the rolls in the four-roll plate rolling machine is different from that in the three-roll plate rolling machine, but the working principle is the same. Both utilize the principle of three-point bending to achieve rolling with different radii. The upper roll remains stationary, while the lower roll moves vertically to clamp the steel plate. The two side rolls move in a straight or curved line towards the upper roll to adjust the curvature radius of the cylinder.

3. Understand the operating procedures

  1. The plate rolling machine must be managed by a designated person.
  2. Operators must be familiar with the machine’s structural characteristics, performance, and usage methods. Only with the approval of the responsible manager can they proceed with the operation.
  3. Before starting the machine, carefully check if the safety devices are intact.
  4. During operation, it is strictly prohibited to place hands or feet on the rolling shaft, transmission components, or workpieces.
  5. After a work interruption, disengage the clutch.
  6. In case of collaborative operations involving multiple individuals, there must be a designated person in command.
  7. Overloading is strictly prohibited.
  8. The tilting reset of the lifting and flipping bearings of the upper roll and the balancing of the upper roll must be performed after the main drive is stopped.
  9. The work area must be kept clean and free from the accumulation of workpieces and debris.
  10. After completing the work, cut off the power supply and lock the power box.

The four-roll CNC plate rolling machine is an important equipment in enterprise production. During your usage, it is essential to operate it correctly. Otherwise, not only will the equipment be damaged, affecting production, but unexpected consequences may also occur.

KRRASS: the best choice for
all sheet metal processing manufacturers

When considering the overall costs of purchasing, maintaining, and operating a sheet metal equipment setup, a sheet metal fabrication service: KRRASS brand is your best choice. KRRASS has a tremendous reputation in the market due to its focus on consistency and quality at the most competitive price.
Whether it’s plate rolling machine or any other application equipment, our team of experts has the right combination of industry knowledge and the latest tool to provide you with the best products and services on the market. Moreover, we set ourselves apart with our advanced system that is completely online. Just let us know what your product needs, request a quote, and start the process.
Make a request and Get Started Today

Learn more about our products, please visit and subscribe to our Youtube channel


Everyone also look:


Sign Up with your email address to receive news and updates.

Leave feedback about this

  • Rating
Choose Image

Request A Quote

Fill in the form below and our team will be happy to assist you


Surprise, 10% Free Now!

Send an inquiry now and enjoy 10% off your purchase


10% off on your first order

Quote Now