2019 Volume 60 Issue 696 Pages 13-18
Skin-pass rolling (or temper rolling) is the final forming step in the production of cold-rolled steel strips. In operation, the delivery angle is applied to improve flatness and to measure tension, but the resulting strip warping (or bowing) remains. In this study, a series of skin-pass rolling experiments and FEM simulations of its condition are conducted to clarify the phenomena and mechanism of the warping. Certain effects of rolling force and delivery tension can be seen on the level of warping in the experiment. Larger delivery angle leads to larger warping, but the value of warping is saturated up to 6° under the conditions of this study. The strip closest to the delivery point is bent with a given delivery angle, but does not fit the deformed work roll surface. This bending leads to a difference in delivery tension and thus to longitudinal plastic strain at the upper and lower surfaces, causing strip warping.
