Based Bearing - Rolls - Study Load And Flatness Problems Rolling Roll Neck Coupling Model

Strip shape and thickness are the two main quality indexes of strip products.As the AGC control system gradually perfect, the thickness accuracy has beenbasically meet the requirements, but the flatness problem is increasinglyprominent, has become a main factor in determining the quality of products. Atpresent, from the perspective of the improved equipment to get the means orreinforcement to improve the strip shape has become the main developmentdirection of the strip shape control technology, these tools in addition to thedirect change of roll gap shape, will also affect the elasticity of the mill rollsystem deformation to play the role of controlling profile. Present numericalanalysis and calculation model of rolling process, mostly will roll neck into arigid body, and not considering roll neck load distribution of elastic roll systemdeformation and the influence of the strip shape, it will produce very big effecton calculation precision. This research established, rolled piece and roll systembackup roll bearing of the overall coupling finite element calculation model, onthe basis of the roll neck process of rolling load distribution and the influence ofvarious influencing factors on the strip shape for a thorough inquiry.In this paper, the main research contents and results are as follows:(1) For different roll neck bearing the traditional approach of rolling finiteelement analysis, on the basis of the establishment of an improved roll system-coupled model and rolling bearings-roller system-rolling overall couplingmodel. Through comparative analysis of the support for the rigid neck roll, rollneck and bearing with part of the rigid, partly rolled three finite element modelfor the elastomer, elastomer and roll neck bearings in the process of coupling theelastic deformation of rolls and unmated flatness differences. Experimentalverification of the reliability of the finite element simulation results, we obtainthe bearings-rolls-rolling relative to the overall coupling model several othermodel is more reasonable. (2) Based on rolling bearings-rolls-rolling overall coupling model toanalyze the process of rolling biting, stable steel rolling and throwing threedifferent stages of the distribution of the load bearing roll neck. Including thedifferent stages of the process of rolling roll neck radial load distribution alongthe axial direction; distribution of the contact pressure between the roll neckand rolling; different stages of rolling out a radial force on the roll neck andhorizontal component, the relationship between the vertical component, thehorizontal component of the vertical component with respect to small, so theimpact of the rolling rolls during the deformation of the roll neck of the roll neckradial load mainly vertical force component.(3) Based on rolling bearings-rolls-rolling overall coupling model toanalyze the plate width, reduction ratio, coefficient of friction and tensionaround the vertical component of other factors on the process of rolling roll neckradial load distribution affected. The results showed that: the plate width and thegreater the reduction ratio on the vertical component of the radial load of the rollneck, friction coefficient, and the vertical component of the tension on the rollneck radial load less affected.(4) Based on rolling bearings-rolls-rolling overall coupling model fordifferent working conditions and the impact of the rolls elastic deformation ofthe rolled plate-shaped rolling process was analyzed, the results showed that:plate width on rolls Effect of the elastic deformation of the projection and theplate is complicated; reduction ratio and the friction coefficient of deformationof the rolls is similar to a greater impact on the rate of reduction rolls andconvexity of the deformation, the friction coefficient of the convex deformationof rollers and the plate less affected degrees; less impact on the roll tensionelastic deformation and convexity, the impact on the roll after tension elasticdeformation and convexity than the previous tension.