Patent ID: 7065998

Claim:
A variable-radius bending machine, comprising: a control element adapted to prevent an external-flange angle iron from being twisted during bending, said angle iron having flanges; at least two couples of lower co-axial rollers and at least a third upper roller, one of said flanges of the angle iron being clamped by said lower rollers, and one of said flanges facing outward, the angle iron being worked by deformation by said upper and lower rollers; at least one cylindrical control roller with three degrees of freedom, said at least one control roller being located at a front of said machine; and a support element supporting said control roller, wherein said control element comprises a head pivoted on a stem, said stem being received into a co-axial housing hole that is frontally formed on said support element of the cylindrical control roller, the head of the control element having a work engaging external surface intersecting an axis of the stem.