Patent ID: 7043953
Filing Date: 2006-05-16
Classification: B21B

Abstract:
1. A method for the X-H rolling of a parallel flange steel structural shape with an H cross section in a tandem operation in a compact rolling group which is comprised of a first universal mill frame, an upsetting mill frame following this first universal mill frame and a second universal mill frame following the upsetting mill frame, whereby the rolls of the mill frames have rolling surfaces which are inclined to the roll axes or are perpendicular to the roll axes, the method comprising: (a) providing vertical rolls with roll surfaces inclined to one another between about 0· and 10· in the first universal mill frame and rolling the structural shape therein; (b) providing vertical rolls with cylindrical rolling surfaces in the second universal mill frame; (c) providing lateral surfaces of the horizontal rolls which form an H caliber or opening cross section with rolling surfaces of the vertical rolls with inclinations of about 0· to 0.5· in the second universal mill frame; and (d) effecting in the second universal mill frame, a reduction of the structural shape which accounts to about 0% to 100% of the reduction in the first rolling mill frame.