Large Radius Bending

Bump bending is a method used to form a series of small bends or "bumps" in a material (usually metal) at regular intervals. Unlike traditional bending, which creates a single, smooth curve or angle, bump bending creates a series of small incremental bends, often in the form of "steps" or "bumps" along the material.

In order to achieve a constant curvature the bend angles are not even distributed along the length of the material. An example of a 90 degree bend with 7 sub steps his shown below

bump1

RightAngle Control control will automatically calculate for you the optimal sequence of bends.

Select the optimal die

In the calculation proocess you could influence the bending by the following parameters:

large2

The Chordal Deviation (D): controls the error allowed for the bend approximation. Since a lot of very shallow bends are created the die geometry is crucial.

It is important not to exceed the Maximum Die-V with your tool selection.

The Die with in the following part settings dialog reflects the standard tool for a certain material thickness. It is not specific for the large radius bending and will be changed in the auto tooling step.

Don’t lock the Maximum Die-V with a value higher than allowed, it will create a inaccurate result

Adjust large bending

Center angle correction

In order to adjust the large bending, you need to follow these steps:

Select correction page
Select bend 1
Input the measured value (e.g. 100deg). RightAngle Control will automatically distribute the corrections on each sub bend. The calculated correction be distributed into each sub-angle will be like below:
```
Bend 1: -1.42
Bend 2 ~ Bend 6: -3.17
Bend 7: -1.42
```

corr1

WARNING : The system changed now all bends. Don’t do an additional corrections in any sub bends.

If you want to adjust the large bending after bending another test part again you need to go to bend 1 and process above.

Direct corrections

You could also directly input correction values for Y1 and Y2. The value will be added on each bend.

Example: If you have 5 Substeps and add 2 degree correction you have an overall correction of 10 degrees. The value will be automatically added to each bend step.