Limitations Of Nonmandrel Tooling

It is now possible to look a little deeper into the limits of nonmandrel bending and expose some of the possible pitfalls.

One pitfall that may be difficult to diagnose is a concentricity problem in the material being bent. One bend may be good, and the next bend will experience a wrinkle. The problem occurs when the heavier wall is on the outside of the bend; this causes excessive flattening and possibly wrinkling on the inside of the bend.

Another common problem occurs when trying to bend too big of tube on too small of a machine. This could be referred to as a rigidity problem.