Abstract
The idea of sleeving is rather old, but the presence of permanent tensile stress in sleeves that may lead to cracks handicapped these types of rolls. The developments in mathematical modelling, metallurgy, non-destructive metal testing and other technologies have enabled the production of sleeved rolls with similar or better properties than the solid ones. The paper deals with techniques that allow reduction in the level of permanent tensile stresses, such as computer simulation. Complex design of sleeved rolls including the shape optimalisation of sleeve and arbour, design of chamfers on back-up rolls reducing Hertzian contact stresses and design of roll grinding will be described. A comparison of measured and computed residual stresses in the sleeve after a thermal treatment will be presented. Finally, practical experience with sleeved rolls in hot rolling mills will be discussed.
Get full access to this article
View all access options for this article.