摘要
在四辊轧机的轧制过程中,辊系的弹性变形、轧制压力分布等都很复杂,现有的辊缝形状解析模型一般都计算繁琐,不能直接应用于板凸度的在线控制。针对轧制过程中轧辊的弹性变形和轧辊与轧件间的相互作用,通过对四辊轧机辊系变形和具体的受力状况分析,从理论上详细推导了直观的辊缝形状函数,明确了其与相关因素的对应关系。同时,为了验证模型的准确性,采用该模型对某“1+4”铝热连轧机的精轧末机架的出口板凸度进行了理论计算,并与在线所测得数据进行比较,其计算结果表明计算精度高,误差在15%以内。因此,该模型具有重要的理论意义和实用价值,为板形的预报和控制提供基础。
During the strip - rolling process of 4 - h mill, elastic deformation of rollers and distribution of rolling pressure are complicated. The computation of existing mathematic models of roller- gap usually is fussy, and strip crown control on - line isn＇t feasible with these models. So it is necessary to seek a better model which is not only useful but also accurate for the crown control. This paper discusses the elastic deformation of rollers and interaction between work rollers and the strip during the roller milling process of some 4 - h mill, by analyzing stress and deformation of rollers, puts forwards a concise and practicable mathematic model of roller gap＇s shape, which resulted from some relevant factors, such as rolling pressure, bending force and so on. At the same time, to validate the accuracy of the model, the theoretical calculation of the crown of the strip of ＂1 ＋ 4＂ aluminium hot tandem rolling mill is made by this model and the relative crown is practically measured on - line. The application results show that the model is precise, and the error between the computation results and experiment results is less than 15 %. Hereby, this model has important theoretical meanings and useful values and can be afforded the elements for the control and forecast of the strip＇s shape at the exit.
出处
《轻金属》
CAS
CSCD
北大核心
2007年第4期50-55,42,共6页
Light Metals
关键词
四辊轧机
弹性变形
数学模型
4 - h mill
Elastic deformation
Mathematical model
