Modelling Of Work Roll Edge Contact In Rolling Ultra-thin Strip

In some ultra-thin strip rolling mills, it has often been found that the edges of the work rolls touch and deform when a narrow thin strip is rolled. In that case, the actual rolling pressure on strip, the intermediate force and the rolling gap configuration stiffness are different from the normal conditions. In this paper, a detailed analysis of the stress and deformation characteristics about work edge contact has been carried out, a new identification method and deformation model of work roll edge contact in hot rolling is developed which based on influence function method. In addition, a lot of working conditions have been discussed and the conclusions can be used to guide the production.Major researches are:(1) Studing traditional influence function method and rapid deformation method, and combine this topic request and carry on corresponding an improvement and built up new four rolls and six rolls stand deformation models. Through a large number of calculation and theoretical research, the accuracy of that model has been verified, the hot steel and cold steel rolling control models are well developed.(2) Studing the past treatment for work roll edge contact in the aluminum rolling and neat rolling. Work roll edge contact deformation part is developed. And a modified influence method is also developed to analyse the hot and cold rolling of thin strip when the work roll edges contact.(3) Using the developmented models of this article, the effect of strip width and thickniss, the profile of work roll, the bending force, the shift length of work roll and intermediate roll, the rolling preasure distripment are discussed. Another analysis is the mill stiffness and roll-bending force control performance changes before and after the edge contacting of work rolls.In this paper, a large number of theoretical researches and models of ultra-thin strip rolling work roll edge contacting, hoping to make some contribution to their profile control.