Patent ID: 8601845
Filing Date: 2013-12-10
Classification: B21D

Abstract:
1. A method for forming, in a production line, profiles ( 50 ) with a cross-section that varies along the length thereof, said profiles being formed from a plane metal strip ( 10 ) that is unwound from a coil ( 9 ), said method employing edge cutters ( 14 ) and a plurality of roll-forming units ( 17 - 24 ), the edge cutters and the roll-forming units being individually displaceable sideways relative to the strip, the steps of said method comprising: controlling the edge cutters along a first pair of opposed curved lines ( thereafter controlling the roll-forming units along a second pair of opposed curved lines ( thereafter controlling the roll-forming units along a third pair of opposed curved lines ( wherein the curvatures of the first, second, and third pairs of opposed curved lines vary the cross section of the profile formed from the strip along the length thereof.