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What is plate rollers?

Description & features of plate rollers

Rolling, roll bending or plate rolling is a continuous bending operation in which a long strip of metal (typically coiled steel) is passed through consecutive sets of rolls, or stands, each performing only an incremental part of the bend, until the desired cross Rolling is ideal for producing parts with long lengths or in large quantities.

Plate roller (Plate rolling machine) is a machine tool for continuous bending of the plate, with the function of rolling O-type, U-shaped, multi-segment R and other different shapes of the plate.The metal sheet can be rolled into a circular, curved and tapered workpiece within a certain range by bending machine.

Plate Bending Machine
Bended metal plate

Plate metal bending using Plate rollers is the preferred technique for any relatively thick metal.

Although plates of various sizes and thicknesses can be used, this is the main manufacturing process for metal curved large plates.

The roll bends are fed using two or three or four rollers and the plate is bent to the desired curvature. The arrangement of the rollers determines the exact bending of the workpiece. Different curves are obtained by controlling the distance and angle between the rolls. The movable reel provides the ability to control the curve.

Plate Roller also been called plate rolling machine or plate bending machine. Plate Roller can be divided into different types due to the use in different industries.From the number of rollers is divided into:

2 Roll Plate Roller

3 Roller Bending Machine

4 Roll Plate Roller

Three-roll bending machine has mechanical and hydraulic type.

Mechanical three-roll bendng machine is divided into symmetrical and asymmetrical type.

The metal sheet can be rolled into a circular, curved and tapered workpiece within a certain range by rolling machine.

Plate roller also been called plate rolling machine or plate bending machine.

From the development of the plate roller, upper roller 3 roller bending machine is the most backward, level down 3 roller bending machine slightly advanced, arc down rolling machine is the most advanced.

These rolls tend to work well in high-volume environments with thin-sheet applications, usually 3⁄16 in. and less. In this setup, a mandrel (also called a spindle pipe) mounted on roll A determines the cylinder radius, so if you need to roll a different radius, you need to change out the mandrel. Once set up, though, operation is simple. You raise roll B against roll A, square the plate against the two rolls, and then execute the rotation.

Bendable metal material:

Carbon steels including S275,430B,P265GH,S355

Case hardened and tempered steels


Duplex & Super Duplex Steels 2205,S31803

High Chrome molly material

Stainless steels 304L , 316L , 321

Specialist steels Hastelloy & Inconel

Plate Bending Chart
Plate Rolling Chart


2 Roller Bending Machine
2 Roll Plate Roller

2 Roll Plate Roller Description:

The upper roller of twin rolls plate bending machine is the rigid metal roller and the lower roller is the elastic roller covered by high strength polyurethane material. It can be adjusted vertically.

When the roller is rotated, the upper roller and the feed plate are pressed under pressure and the elastic layer of the lower roller is pressed into the lower roller to produce elastic deformation.But due to the volume of the elastomer is constant, the pressure pass on all around, and produce high strength, uniform distribution, continuous action of back pressure which forced the plate and the rigid roller stay close continuously, the purpose is to make it rolled into a cylinder with rotation.

The depth of the upper roller, which is the deformation of the elastic layer, is the main technological parameter that determines the bending radius.

According to the experimental study, the greater the reduction, the smaller the sheet metal bending radius, but when the amount of indentation reaches a certain value, the bending radius tends to remain stable, which almost has nothing to do with rolling reduction, this is an important feature of twin roller plate bending technology.

Double roller plate bending rolls mainly aimed at the metal plate with the width of 2000 mm, thickness below 2 mm for round rolling, main apply to batch production of a thin container of household appliances. Generally, it can equip with automatic feeding system and automatic discharging system, with a high degree of automation, and high yield.

2 Roll Plate Roller Features:

High productivity and simple operation

3000-4000 small piece work can be processed per day.

Excellent edge bending, roundness, and cylindrical.

Flat plate, pressed work, work with hole, uneven work can be processed

No scratches on work

aluminum, stainless steel, printed work can be processed.

Automatic deflection stopper

When processing thin and long material by urethane roll, deflection appears on upper roll from pressurizing. Also deflection will be appeared in the center of work where forming pressure is not enough. However ISEL has controlled pressure to push the center of urethane roll by hydraulic system and solved this problem.(PAT.)


2 Roll Plate Roller Disadvantages:

Due to each change in the diameter of the making parts need to make guide roller wheel, it is not suitable for multi-variety and small-batch production.

It cannot be processed with the thick plate and the maximum thickness of the plate is 6 ~ 9mm.

3 roller bending machine features:

Can equip with numerical control system with PLC,low requirement for the operatorEasy to use,easy to operate, no cumbersome steps are required; CNC have Clear operation and various bending options,the possibility of error is small

Principle of 3 Roller Bending Machine

It can bending medium thickness plate without slipping,for the conditions and requirements of the roller, the manufacturer can also provide customers with solutions and methods in the first time.

3 Roller Bending Machine
3 Roller Bending Machine

Machine cleaning is also very convenient,in terms of materials, cleaning and maintenance are very easy, low maintenance rate.

Horizontal feeding,does not need to equip with expensive side push device,able to rolling large angle conical workpiece.

Price below the four roller plate bending rolls with same bending ability.

4 Roll Plate Roller features:

4 roll plate roller are known for their speed, mainly because the workpiece doesn’t have to be removed before rolling to perform the second prebend. You introduce the plate, and the machine grips it between rolls D and C. Roll A then moves up for the first prebend. The system then forms the cylinder, after which roll B raises up to perform the second prebend.

Principle of 4 roll plate rolle
Principle of 4 roll plate roller

Adopts a torsion-axis synchronous structure, has high precision and roundness after being rolled up! Hydraulic transmission, compared with mechanical transmission, low noise, compact structure, convenient maintenance and use, environmentally friendly and energy efficient.

4 Roll Plate Bending Machine
Four Roll Plate Bending Machine

Has function of roll round, pre-bending, correct the circle, with coarse leveling function. Can pre-bending and rolling of the end of sheet metal can be carried out on the same equipment, reeling process is completed in one pass, including bilateral pre-bending.Straight plate is short (the precision of the formed part is high.) and the pre-bending effect is good! More suitable for roll cones.

The material plate can be directly shaped and flat on the equipment, and the surface quality of the parts is good.

It can be rolled up in many shapes, including round, curved, conical under certain conditions, etc., to obtain a larger tortuous curvature and a high yield.

Fast, efficient, and easy to operate, requiring only one operator. With automatic alignment and clamping function, the plate will not slide and run off, has anti-overload and hydraulic protection functions.With anti-wear, permanent lubrication-free features.