The cross-sections of the bars are designed from steel rolled profiles.
Roll forming is a widespread method for manufacturing cold rolled profiles.
A new type of cellular beams fabricated from hot rolled profiles appeared recently, whose openings have a sinusoidal shape.
One difficulty with these connections is that oftentimes the rolled profiles needed to fabricate the T-stub needed for deep beams are not immediately available to fabricators and so built-up sections are the only alternative.
Researches on the basic shape control means, such as roll profile optimization, rolling mill type selection, rolling process optimization, local shape control, edge drop control, and comprehensive control of shape and surface quality, have achieved great progress in the past 10 years.
The analytical model is used to systematically examine the dependence of the filling ratio at the roll gap, the mean stress and the variation of density at the exit of the rolled product on various rolling conditions, including the inclination of the roll profile, the round arc radius of the inner roll, the rolling radius, and the thickness reduction of the porous sheet, etc.
Yu, et al. [71], put forward a roll profile optimization technology of hot rolling mill, which is effective to prevent the convex rib for cold rolling strip.
The possibility of convex rib defect in a cold rolling strip was effectively reduced by reasonably arranging the hot rolling schedule, controlling the thermal crown of hot rolling work roll, and optimizing the roll profile [72].
In this study, a computer-aided-design (CAD) system to support roll pass and roll profile design of bar rolling, where simple shapes like round and square bars are produced, was developed in order to minimize trial and errors in industry.
Sun, et al. [80], adopted a single-side straight-taper work roll profile to enhance the edge drop control capacity of the 6-high UCM rolling mill.
