SECTION BENDING MILL Russian patent published in 2000 - IPC

FIELD: plastic metal working, namely, equipment for making bent sections of sheet material having high rigidity and lengthwise closed periodic corrugations. SUBSTANCE: mill for making high-rigidity sections from strip blank with thickness S includes three successively arranged working stands with upper and lower rolls. One or two first stands are used as shaping stands. Last stand is used for cutting and it is provided with rolls having stepped barrels with two different-diameter portions of the same length arranged mutually opposite and having predetermined value of small diameter. Upper roll of cutting stand has two cylindrical turnings with predetermined geometry arranged symmetrically relative to lengthwise axis of mill. EFFECT: reduced quantity of metal crops due to lowered fluctuation of width of non-symmetrical high-rigidity sections. 2 dwg, 1 ex