Roll bending and rolling process of bending device

摘要

A steel strip (20, 60) is supplied, and between a drive roller (11) and a compression roller (12, 80, 90, 100) is compressed, a tension in the steel strip (20, 60) to be produced, the greater than a yield stress is, and a peripheral portion (28) of the steel strip (20, 60), which lies on a side in a conveying direction to extend to a greater extent than the other peripheral portion (29) of the steel strip (20, 60), which on the other side. The compression roller (12, 80, 90, 100) comprises a first contact portion (121) and a second contact portion (13). The second contact portion (13) extends from one end (124) of the first contact section (121) in the axial direction of the compression roller (12, 80, 90, 100). The end (124) of the first contact section (121) has an outside diameter (d1), which is smaller than an external diameter (d2) of the second contact section (13).n="39"