BUILTUP ROLL Russian patent published in 2003 - IPC

FIELD: rolling processes and equipment, namely rolls of rolling stands of sheet rolling mills. SUBSTANCE: builtup roll with relation of barrel length to diameter exceeding 1 includes carrying shaped arbor and bandage having profiled inner surface and mounted with clearance with possibility of free motion of its small diameter portions in heated state along carrying arbor through large diameter portions (along their length). Generatrix of surface of barrel of arbor is profiled according to relationship: . Generatrix of inner surface of bandage is profiled according to relationship: , where y₀ - Y-coordinate of profile of roll arbor; α - maximum camber, mm; L - length of roll barrel,mm; x = 0 ... L - current coordinate of profile along roll barrel; Dnom - nominal diameter of arbor, mm; ΔD - change of inner diameter of bandage at heating, mm; δ - clearance, mm; m - difference between maximum and minimum diameters of inner surface of bandage sufficient for mounting arbor at assembling, mm; Yb - ordinate of profile of inner surface of bandage. EFFECT: increased useful life period of builtup roll, more complete use of arbor due to constant clearance along the whole length of joined surfaces, elimination of residual bending at operation, improved technological process for making roll. 3 dwg, 1 tbl, 1 ex