O que é máquina dobradeira de rolo de placa?

What is plate roll bending machine?

What is a sheet metal bending machine?

Plate rolling machine operation procedure and method

Plate roll bending machine is a tool for continuously bending plates into various shapes such as O-type, U-shape and multi-segment R-shape. It comes in mechanical and hydraulic versions. The machine is also known as a sheet rolling mill or sheet bending machine.

The working principle of roller bending machine:

The structure of four roller plate bending machine

The upper roller of the symmetrical plate rolling machine moves vertically in the center of the two lower rollers through the hydraulic oil in the cylinder acting on the piston. This movement is then transferred to the two lower rollers via the main reducer final reduction gear, providing torque to the roller plate.

The sheet metal is passed through the three working rolls (two lower rolls and one upper roll) of the machine, where the pressing of the upper roll and the rotation of the lower roll result in continuous bending (compression deformation of the inner layer, middle remains unchanged , external stretching deformation), leading to permanent plastic deformation. The metal sheet is then rolled into the desired shape, such as a cylinder or cone.

One disadvantage of the three-roll hydraulic press brake is that the end of the plate needs to be pre-bent with the help of additional equipment.

This plate rolling machine is suitable for large roll bending machines with a thickness of 50mm or more. The bottom of the lower roller is equipped with a row of fixed rollers to shorten the span of the two rollers, improving workpiece accuracy and improving the overall performance of the machine.

Roll bending machine classification

Classification

Roll bending machines can be categorized based on their use in various industries. They are mainly divided into two types based on the number of rolls: three-roll bending machines and four-roll bending machines.

Three roll bending machine is divided into:

  • 3-roll symmetric press brake
  • level down three roller bending machine
  • arc down laminating machine
  • three roll universal bending machine with top roll
  • hydraulic CNC bending machine

Roll bending machine can be divided into mechanical and hydraulic types. In terms of development, the universal top roller three-roll bending machine is considered the most outdated, while the flush three-roll bending machine is a little more advanced. The most advanced type is the falling arc rolling mill.

Three Roll Bending Machine

W11 3-Roller Mechanical Symmetrical Plate Rolling Machine (Export)

Three Roll Plate Rolling Machine includes:

  • Mechanic
  • Hydraulic

The mechanical three-roll bending machine is divided into symmetrical and asymmetrical .

Three symmetrical mechanical rollers

W11F 3 Roller Mechanical Asymmetric Plate Rolling Machine

The machine structure is symmetrical three-roller.

The upper roller is positioned in the center between the two lower rollers in a symmetrical way to facilitate vertical movements. This is achieved through the screw that drives the helical gear. The two lower rollers provide rotary motion, which is transmitted through the reduction gear output and meshing with the lower roller gear to generate torque to roll the plate.

However, the machine has a limitation in that it requires additional equipment to pre-bend the end of the plate.

Three asymmetrical mechanical rollers

The machine structure is an asymmetrical three-roller design.

The upper roller serves as the primary drive, while the lower roller is responsible for vertical movement.

The plate is fixed by engaging the lower and upper roller gears.

The side roller performs vertical movement and has additional functions of pre-bending and round lamination.

It has a compact structure and is known for easy operation and maintenance.

Hydraulic Plate Rolling Machine

Features of Three Roller Hydraulic Symmetrical Bending Machine:

  • The machine is equipped with a hydraulic oil cylinder that drives the piston rod, allowing vertical movement.
  • The lower roller provides torque to the roller plate through a gear reducer output gear engagement mechanism, which drives its rotation.
  • The bottom of the roller is equipped with an adjustable conveyor roller.
  • The upper roller is drum-shaped and helps to improve the linearity of the finished product, making it suitable for tanks of long sizes and various cross shapes.
  • The symmetrical three-roll bending machine with upward adjustment has the ability to roll metal plates into circular, curved and conical shapes within a certain range.
  • The lower roller is the driving roller, while the upper roller is the driven roller.
  • It is widely used in industries such as shipbuilding, boilers, aviation, hydropower, chemicals, metal structures and machinery manufacturing.

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