The results showed that results of theoretical simulation calculation of pressure between rolls basically corresponded to that by three-dimensional photoelasticity stress test analyzing, the average relative error was less than 8%.
A Multi-Objective optimization theory is established for selecting rolls system parameters of 4-high cold strip mill including weight of mill stand,rolling power , distribution coefficient of contact pressure between rolls ,mill stand stiffness, profile changeability of loaded gap.
This paper analyses the roll deformation and contact conditions between rolls,and discusses the inaccuracy of the assumption that thd distribution of rolling force and pressure between backup and work rolls can be expressed by polynomials.
According to the characteristics of process technology for high-strength steel skin-passing,and also the flatness of strip,taking the uniform distributions of both strip forward tension and pressure between backup and work rolls as the objective function during optimizing,and considering mechanical properties requirement of all the high-strength steels as the constraint conditions,a mathematic model to determine the range of rolling and bending forces of a skinpass mill for hot-rolled high-strength steels is obtained.
Synopsis By way of analysis on the various existing algorithm theories and methods and the roll gap pressure and flattening, and further theoretical derivation and experimental verification it is proved that a pretty good linearship exists between elastic contact flattening at the roll gap and the contact pressure. Effective use of this linear relationship in calculating the elastic deformation of the contacting rolls can achieve higher precision of the calculated value.