Importance

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Abstract

In accordance with an exemplary embodiment of the present invention, a flexible roll forming method for roll forming a beam of a predetermined shape by bending a material fed to a plurality of roll forming units each having upper and lower forming rolls in succession, and for roll forming the beam by feeding the material to a flexible roll forming unit having upper and lower forming rolls disposed on left/right sides of a process direction and both side upper and lower forming rolls disposed to vary positions in a lateral direction of the process and angles from a process direction, respectively, to cause flexible bending of the material in succession over multiple stages, is provided.

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First Claim