Differences Between 2 Roll, 3 Roll, 4 Roll and Geometry ...

Geometry Plate Benders

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This type of plate bender provides flexibility by allowing the operator to work with a wider array of metal thicknesses and achieve more precise results. Geometry plate benders are also capable of creating a variety of geometric shapes, like cones, and can be used to create 2 roll and 3 roll bending output.  

Which Bending Machine Is the Best?

One of the key decision-making factors you should consider is not only what type of plate bender will meet your current needs, but which could also satisfy future business needs. For instance, if you currently need a machine that can crank out large volumes of cylinder shaped materials, all four types of benders can perform this task.

If this is the only type of output you create, then a 2 roll bending machine could easily satisfy your shop&#;s needs. On the other hand, if you also are considering expanding your operation to offer a greater variety of shapes or are looking to increase the precision of the output, then a 3, 4, or geometry bender might be the better choice.

For assistance in selecting the best plate roll bending machine for your business, please feel free to contact Quantum Machinery Group at (909) 476- to speak with a representative today!

What is the Difference Between Bending and Rolling Metal? 

What is the difference between bending and rolling a metal sheet?

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At Toledo Metal Spinning, when we fabricate our cylindrical tanks and tubes, we use the process of roll bending.

Roll Bending

Also known as angle bending or plate rolling, this is the process of bending the metal sheet or blank into a curved shape. This is typically achieved by passing metal through a series of rolls that progressively bend the material into the desired curve. Roll bending is achieved by determining the angle of the rollers and the exact pressure from the rollers. At Toledo Metal Spinning Company, we use the roll bending process in our daily routines to roll our cylindrical tanks and tubes.

There are a few different types of machines designated for roll bending. They are often very similar, but have a different number of rollers. A 3-Roll Bending Machine has three rolls in a triangular shape, while a 4-Roll Bending Machine has a fourth roller, which helps to increase the control and accuracy of the shape.

The rolls, or rollers, are the pieces that support the metal sheet or blank. These apply a specific amount of pressure (designated by the controller) to ensure the material is formed into the proper shape. It is also extremely important to keep in mind the minimum and maximum radii, because that will directly impact the size of the cylinder or tube being formed. Another important term to understand is the amount of pinch given in the initial bend of the material. In the video below, notice the pinch happening between 3-5 seconds in, and then again from the front point of view, between 13-15 seconds. The pinch bends the metal, while holding it between the two rolls. There is a certain amount of pressure applied to ensure that the material is bent and rolled through the rolls at the correct angle.

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