非对称因素对热轧纯钛中厚板出口楔形的影响

The Influence of Asymmetric Factors on the Outlet Wedge Shape of the Hot Rolling Pure Titanium Medium and Thick Plate

摘要:

针对纯钛中厚板热轧过程中可能出现的轧件断面楔形问题,结合四辊轧机设备和工艺的非对称特点,基于影响函数法建立双悬臂梁辊系弹性变形模型,研究对中误差、机架刚度差、坯料楔形、横向温差等非对称因素对轧件断面楔形的影响。结果表明对中误差、机架刚度差、横向温差对出口楔形的影响随着板宽和压下量的增大而增大,入口楔形对出口楔形的影响随着板宽增大和压下量的减小而增大。

Abstract:

Aiming at the wedge shape problem of rolling section that may occur in the hot rolling process of pure titanium medium and thick plate, combined with the asymmetric characteristics of four-high rolling mill equipment and technology., the elastic deformation model of double cantilever beam roll system is established based on the influence function method. The influence of asymmetrical factors such as the centring error, stiffness difference of mill stand, wedge shape of billet, transverse temperature difference of workpiece and other asymmetric deformation parameters on rolling section wedge shape are investigated. The results indicate that the effect of the above influence factors increase with the increase of the plate width and rolling reduction. The influence of the inlet wedge shape on the outlet wedge shape increases with the increase of the plate width and the decrease of the rolling reduction.