Patent ID: 11878337
Assignee: INGVEST AB
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 3:
4. A roll-forming machine according to claim 1, wherein
the clamping rollers (23a, 23b) of the second pair of clamping rollers are configured to be individually displaceable sideways transversally to said feeding direction and individually pivotable about a vertical pivot axis (PA2, PA3) during the forming operation; and
the electronic control device (12) is configured to control the sideways displacement and the pivoting of the clamping rollers (23a, 23b) of the second pair of clamping rollers during the forming operation such that said second peripheral folding edge (25) follows a fold line (F2, F3) between said web (4a, 4b) and the central flange (2) and a plane (P2) passing through centre axes (CA3, CA4) of both clamping rollers (23a, 23b) of the second pair of clamping rollers is always maintained perpendicular to a part of the fold line (F2, F3) in contact with the second peripheral folding edge (25).