| 摘要 |
PROBLEM TO BE SOLVED: To provide a bending method for a wide-flange shape steel capable of working the wide-flange shape steel into a shape whose both sidefaces are smooth in bending work for the wide-flange shape steel with a desired curvature and a bending method for bending equipment suitable for executing such a method. SOLUTION: The bending work for the wide-flange shape steel and equipment therefor comprises the process wherein a deformation center line in the longitudinal structural portion of the wide-flange shape steel to be bend-worked is displaced to the inner diameter side, compressive stresses acting on the inner diameter side is reduced, and the bending work with a desired curvature with the elongation deformation on the outer diameter side of the wide-flange shape steel as a subject. And the equipment for bending work having a pair of fixed rollers 10 disposed on the outer side in bending work, press roller 12 for pressing the wide-flange shape steel being a work piece placed along the both fixed rollers from the inner diameter side, is provided with a buckling preventing mechanism consisting of an outside pressing roller 14 disposed on the vicinity of the intermediate position of the fixed rollers, and an inner side pressing roller 16 disposed opposing to the outside pressing roller and clamping the lateral structural portion on the outside of the wide-flange shape steel from the inner side.
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