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6 Tips to Choose the Right Angle Roll Machine

What Is an Angle Roll Machine or Angle Roller?

angle roll
Angle Roll

Angle Roll (aka, Angle Roller, Angle Iron Roller, Angle Roll Machine, Section Bending Machine, Aluminum Bending Machine) are roll-bending machines used to roll out shapes of materials to a specific radius or diameter. Their working principle is similar to the plate rolling machine, but the structure is more complicated than the plate rolling machine

Read More: Angle Roll Machine, Angle Roller – CNC Complex Shape Bending 

3 Different Bending Process Types of Angle Roll Machine(Angle Roller)

Angle rolls are divided into three forms according to the different roll bending processes: pyramid, single pinch, and double-pinch profile bending machines. 
Read More: Profile Bending Machine: 5 Things Before Buy, 6 Steps to Bend

The number of rolls an angle roll has is an important difference, the rolls are the round, spinning parts of the angle roll that allow it to do its job.
Every angle iron roller comes with at least one pinching roll, which is the roll that holds the metal in place and allows it to be fed through the angle bender machine.
Angle rolls come in two varieties: single-pinch and double-pinch, referring to how many pinching rolls it has.
Pyramid-type angle roller: It is a symmetrical bending roll bending machine.
Single-pinch and double-pinch angle roll: both of its forms are machines for asymmetrical roll bending machines. The double-pinch angle roll can perform asymmetrical and symmetrical bending processes, and the special structure makes it a better pre-bending ability.

working principle of double pinch pyramidal section bending machine
working principle of pyramidal section bending machine
working principle of single pinch angle rolls
working principle of single pinch angle rolls
working principle of double pinch profile bending machine
working principle of double pinch profile bending machine

Type 1#: Single pinch angle roll

In the single pinch angle rollers, only one of the bottom rolls can move. With this, kind of angle roller, it is possible to work only in an asymmetrical way. We can’t even find its pictures on the Internet.

Type 2#: Double pinch angle roll machine

In the double pinch angle roll machine, the top roll has a fixed position, while the bottom two can move and can be moved independently one from the other. This kind of machine is the most flexible, and consequently is the one that allows for obtaining better performances The possibility to move independently the bottom rolls allow us to manage in the best way the pinching and bending operations, permitting them to work symmetrically and asymmetrically.

Type 3#: Pyramidal of angle iron roller

In the pyramidal section bending machines the bottom rolls have fixed positions, while the top one can be moved down. With this kind of angle iron roller, it is possible to work only in a symmetrical way.

Difference between three types of angle roller

Production costs: The double pinch angle roller style is the most expensive one to be constructed because there are more movable parts and consequently more components. The pyramidal angle iron roller and single pinch profile bending machine have more or less the same production cost.

Flexibility: Double-pinch angle rollers are the most flexible. During operations, it is possible to maintain A stable position of the profile at the loading side of the Angle Roller and use only the roll at the opposite side to bend the steel or aluminum profile. It is possible to operate in this way also in the single pinch style section bending machines, but not on the pyramidal section benders.

3-roll angle roller & 4-roll angle iron roller

Pressing rolls are part of the angle roll bender that does the actual bending. Here there are even more varieties than with pinching roll.

Examples of different types of angle rollers based on the number of pressing rolls include three-roll double-pinch, four-roll double-pinch, three-roll initial pinch, and more.

angle roll
3 rollers angle roll machine
4 roller profile bending machine
4 rollers angle iron roller

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Six tips for choosing the best angle iron roller

Choosing an Angle Roll Machine may seem difficult but it really breaks down into a few simple steps. First, determine the metal material you will be rolling and the maximum size and type of material you will be rolling. Next determine the types of profiles (angles, flats, tubes, etc.) that you will be forming. Lastly determine if you will be rolling material into one simple radius or if you will have or need the ability to have, the capability of forming variable radii.
Roller for angle roller
Roller for angle roll
Roller for angle iron roller
Roller for angle roll
w24s profile bending machine
PBH Angle Roll for Carbon, Stainless Steel
PBH Angle Roller

Section Bending Machines for roll bending of various metals. Steel bars, angle irons, H and I beams, channels, tubes, and pipes bending made easy.
Powerful roll bending ability can bend Carbon Steel, Stainless Steel, and Aluminum Profiles to over 180° and into circles or arcs, and is often chosen to create circular pieces.
The maximum bending section modulus of PBH Section Bending Machines can reach a real 1000m3.

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PBA Angle Roller for Aluminum
PBA Angle Roller/Aluminum Bending Machine

PBA Series CNC Profile Bending Machine is an aluminum bending machine for aluminum profiles;
Up to 15 independent controllable servo axes; Automatic CNC systems; Three-dimensional bending. Accuracy is as high as ≤0.01mm.  which is the standard and optional equipment of the PBA-CNC series aluminum bending machine.
Can be bent in various shapes (3-D graphics, C-shaped, U-shaped, full circle, ellipse, multiple radii combination shapes, etc.)

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Tips 1#: Pressing rolls for angle roller

Pressing rolls are responsible for the bending process and come in far more varieties than angle iron rollers. Common examples include four-roll double-pinch and three-roll initial pinch.

Tips 2#: Yield strength

The yield value of Q235: refers to the yield value of this material, around 235MPa.

Regarding the yield strength of the angle iron roller, BIT machines are uniformly calculated based on the yield value of Q245 and have a yield strength of between 36,000 and 38,000 pounds per square inch (PSI). If you have special requirements, please indicate the yield strength of the metal material in the inquiry.

Tips 3#: Correctly sized

Whether operators are bending angle iron, tool choice is critical. The tools need to fit the profile yet not be so tight as to negatively affect workpiece shrinkage and growth. A tool that’s too tight can cause localized distortion and, at worst, actually gouge the material surface.

When operators need to bend an open profile like an angle, they have fewer distortion-mitigating tools at their disposal. Beyond tool choice and fit-up, angle iron roller must choose a correctly sized machine, one with sufficient forming tonnage and adequate grip lengths—enough to provide the needed leverage to reduce distortion, but not so long that they will require an excessively long sacrificial straight section, the long sacrificial flat section becomes expensive scrap, reducing the roll shop’s competitiveness.

Tips 4#: Pre Bending

bending process of 3-roll section bending machine
bending process of 3-roll angle roller

How do minimize the unbent flat of the bending process?
BIT’s angle iron roller has the independent motion of the two side rolls allowing the operator to minimize the sacrificial unbent flat sections on the workpiece. Again, typically a roll shop that bends a small workpiece on a large section bending machine (angle roller) must factor in a long flat section, which increases material costs.
But because the BIT angle rollers (profile bending machines) move the way they do, an operator can move a joystick or push a few buttons on the control to reconfigure them into a smaller-machine orientation. Beyond this, operators can fine-tune the roll position to minimize the unbent flat even further.

Tips 5#: Different bending capacities of angle rollers

The types of metal an angle iron roller can process largely depend on its bending capacity, we use the section modulus to evaluate the capabilities of the angle iron roller. Capacity is one of the most notable differences between these angle iron rollers, each angle roll has a section modulus rating.

Make a list of the materials and the size of the metal profile you work with on a regular basis and consult an expert to figure out what type of angle iron roller is best for you. When determining which angle rolling machine is best suited for the task one has at hand, it is important to research what each section bending machine is designed to do, and to understand the materials that one will be working with.

We provided detailed information about the section bending machines, such as capacity and yield.

Tips 6#: View Bending Capacity Table

Compare the information about how much force an angle iron roller can produce and what kind of metals (sheet, roll, etc.) it is designed to handle, and compare this to your site’s mill certificates or other relevant information to see which angle roll best fits your needs.

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