配备组合式支承辊的四辊冷轧机辊系弹性变形数学模型  

Mathematical model of elastic deformation of cold reduction mill equipped with composite back-up roll

作　　者：董永刚[1] 苏玉龙[1] 张岩岩[2] 

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004 [2]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《中南大学学报（自然科学版）》2013年第6期2298-2303,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50775196);河北省博士后科研项目(2011)

摘　　要：为求解配备热装组合式支承辊的板带冷轧机辊系弹性变形,将辊套和辊芯进行分段离散,并考虑辊套装配凸度以及辊套与辊芯之间的弹性压扁,根据工作辊、辊套及辊芯之间的变形协调以及力平衡条件,采用影响函数法推导出热装组合式支承辊辊系弹性变形数学模型,并编程求解辊系弹性变形,分析不同弯辊力、窜辊量以及带材宽度对辊系弹性变形的影响。实验结果表明:随着工作辊弯辊力和板宽度的增加,组合式支承辊辊间压扁产生由中间凸到中间凹的变化,且横向分布趋于均匀,随着工作辊窜辊量的增加,辊间压扁出现非对称分布,且非对称程度逐渐增大,窜辊量为100 mm时左右两端的辊间压扁差值超过30μm;弯辊力变化和窜辊量对组合式支承辊挠度的影响分别不超过0.7μm/(10×104N)和0.8μm/100 mm,带材宽度变化对挠度的影响达1.8μm/100 mm。For solving the elastic deformation of the four-high cold strip mill equipped with the composite back-up roll, the roll sleeve and roll mandrel were studied by the discrete segment individually, then the assembled crown of the roll sleeve and the elastic flattening between the roll sleeve and roll mangle were considered, and the model of elastic deformation of cold strip mill was derived by the influence function method according to the deflection concordance principle between the roll sleeve and roll mandrel and working roll and the force equilibrium condition. Moreover, the solution matrix was listed and the solving program was compiled to solve the elastic deformation of composite back-up roll, and the influences of bending force, cross sliding value of work roll and width of strip on the elastic deformation were analyzed by compararing it with that of integrated back-up roll. The research results indicate that the roll flattening distribution along the lateral direction changes from the convex style to the concave style on the middle region of composite back-up roll with the increase of the bending force and strip width, and the roll flattening distribution becomes more asymmetry with the increase of the cross sliding value of work roll, the difference between the left side and righ side beyonds 30μm as the value of cross sliding is 100 mm. Moreover, the influences of the bending force and cross sliding value of work roll on the deflection of composite back-up roll are not more than 0.7μm/（10×10^4 N） and 0.8μm/100 mm respectively, and the influence of the strip width on the deflection reaches 1.8 μm/100 mm.

关 键 词：组合式 支承辊 装配凸度 弹性压扁 挠度 

分 类 号：TG335.4[金属学及工艺—金属压力加工]