板带轧机工作辊混合变凸度辊形研究  

Research on Mixed Variable Crown Contour for Work Roll of Strip Mill

作　　者：孔繁甫[1] 何安瑞[1] 邵健[1] 李同庆 

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]中钢设备有限公司北京1000801

出　　处：《机械工程学报》2012年第22期87-92,共6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)资助项目

摘　　要：三次连续变凸度(Continuously variable crown,CVC)辊形凸度控制能力与带钢宽度之间的二次函数关系决定其在宽、超宽板带轧机上应用时表现出对窄规格带钢的凸度控制能力不足的缺点。通过对工作辊变凸度辊形及辊缝形成理论的深入研究,提出采用二次多项式曲线来线性化辊缝的方法。采用该方法设计完全线性变凸度辊形曲线与混合变凸度工作辊辊形曲线,使二次辊缝凸度调节能力与带钢宽度在工作辊全长或在设计要求的宽度范围内呈严格线性关系,同时保持与窜辊位置呈线性关系。与CVC辊形相比,混合变凸度辊形的辊径差小、凸度调节能力大,既不削弱对宽带钢的凸度调节能力,又增加对窄带钢的凸度调节能力,从而增强轧机的整体板形控制能力。Crown adjustment capacity of the 3-order continuously variable crown（CVC） roll is proportional to the square of strip width, which is inevitably insufficient to the need of the narrow band strip when it is employed on the wide/ultra wide strip mills. Based on a deep research of the variable crown roll＇s contour design theory and the lateral roll gap formation mechanism, a method that uses quadratic polynomial curves to linearize roll gap is proposed. With this method, the complete linearly variable crown contour and the mixed variable crown contour are designed, whose crown adjustment capacity is not only proportional to axial shift position of work rolls, but also proportional to strip width in the whole width range or in the desired width band respectively. Compared with CVC contour, mixed variable crown contour ensures a less difference of the roll diameter and a stronger crown adjustment capacity, suitable for both wide and narrow strip, therefore, enhancing shape adjustment capacity and the overall performance of mills.

关 键 词：板带轧机 板形控制 工作辊 辊形 

分 类 号：TG335[金属学及工艺—金属压力加工]