铝热连轧分段冷却系统建模与仿真  

Modeling and Simulation of Subsectional Cooling System during Hot Aluminum Rolling

作　　者：郭新宇[1] 何安瑞[1] 邵健[1] 周滨 李全梁 

机构地区：[1]北京科技大学高效轧制国家工程研究中心,北京100083 [2]广西柳州银海铝业股份有限公司,柳州545006

出　　处：《机械工程学报》2013年第4期70-74,共5页Journal of Mechanical Engineering

基　　金：新世纪优秀人才支持计划(NCET-10-0223);中央高校基本科研业务费专项资金(FRF-TP-11-003A);国家科技支撑计划课题(2012BAF09B04)资助项目

摘　　要：为研究工作辊分段冷却系统对铝带断面形状的影响,建立冷却水影响下的工作辊温度场及热膨胀模型并使用交替差分法对模型进行求解。利用该模型,研究不同冷却水分布模式下工作辊热辊形的形态、冷却水量与工作辊热膨胀的定量关系以及改变冷却水量后热辊形的形成规律。仿真结果表明分段冷却系统具有较强的局部辊缝形状控制能力,辊缝三次凸度和四次凸度的控制能力分别为30.8 m和22.8 m;边部控制能力在冷却水量为0～50%区间内达到最大为16.6 m;冷却水量与局部冷却段热膨胀呈现良好的二次关系;改变冷却水量后,工作辊热膨胀的相对变化速度与水量无关,为系统固有特性;根据冷却水与工作辊热凸度的定量关系和热膨胀变化速度可以实现对工作辊局部热膨胀的精确控制,从而有效控制铝带断面形状。In order to study the relationship between the subsectional cooling system and section shape of aluminum strip, a temperature field model has been built based on the alternating finite difference method. With the model, issues such as work roll thermal contour under different cooling water distributions, quantitative relationship between cooling water and thermal crown, and the evolution of thermal crown when changing cooling water have been researched. The results shows that subsectional cooling system has a strong control ability of local thermal expansion; when the width of aluminum strip is 1 500 mm, the relation between cooling water and thermal crown is quadratic; and the changing rate of thermal crown is independent with the amount of cooling water. Based on the conclusions above, work roll thermal expansion can be controlled quantitatively by the cooling water, accordingly providing an effective way of controlling section shape of aluminum strip.

关 键 词：铝 热轧 分段冷却 板形控制 差分法 

分 类 号：TG333[金属学及工艺—金属压力加工]