冷连轧机组动态变规格时带钢楔形区参数优化设定  

Optimization setting of wedge zone parameters of strip steel during flying gauge control of cold rolling mill

作　　者：王文奇 李健 白振华[1,2] WANG Wenqi;LI Jian;BAI Zhenhua(National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,Yanshan University,Qinhuangdao 066004,Hebei,China;Shenzhen Research Institute,Yanshan University,Shenzhen 518000,Guangdong,China)

机构地区：[1]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 [2]燕山大学深圳研究院,广东深圳518000

出　　处：《钢铁》2025年第2期76-83,共8页Iron and Steel

基　　金：河北省自然科学基金资助项目(23280101Z);河北省高等学校科学技术研究资助项目(CXY2023012);河北省科技重大专项资助项目(23280101Z);河北省科技重大专项资助项目(22281001Z)。

摘　　要：冷连轧过程中,连续轧制的带钢从一个规格变化到另外一个规格称为动态变规格(FGC),在这个过程中必然会存在一个带钢厚度的楔形过渡区。楔形过渡段的设计包括厚度曲线设计、轧制速度设计以及张力的设计,在这个过程中有2方面问题需要考虑,从板材成材率的角度楔形区应该越短越好;同时为了使动态变规格过程中张力及轧制压力变化平稳,防止断带事故发生,楔形区也不能太短。某钢厂5机架冷连轧机组动态变规格过程中楔形区设定不合理,在对生产实绩的跟踪中发现现场发生多次断带,机组不得不停机重新穿带,极大降低了生产效率。基于以上问题,充分考虑轧机的设备和工艺特征,在分析机组动态变规格控制逻辑的基础上,进行楔形段带钢厚度变化曲线的参数化设计,推导适用于动态变规格时的带钢变断面张力微分方程,建立楔形区张力和速度的关系模型。在以上分析的基础上,以保证不断带和轧制压力均匀过渡为目标,结合部分机组设备及工艺条件的限制,建立了动态变规格时楔形段控制目标函数,开发了一套冷连轧机组动态变规格时楔形区参数优化设定技术。该技术可以通过迭代计算得到冷连轧机组动态变规格时最优楔形区参数。将该技术应用于现场后,设计出了符合现场设备及工艺条件的楔形段厚度变化曲线及速度调节曲线,提高了变规格时机组运行的稳定性,经过统计调研发现,机组断带次数较之前有明显的降低,提升了现场冷轧机组的生产效率。During the cold rolling process,the continuous rolling of strip steel changes from one specification to another,which is called flying gauge control(FGC).During this process,there will inevitably be a wedge-shaped transition area of strip thickness.The design of the wedge-shaped transition area includes thickness curve design,rolling speed design,and tension design.In this process,two aspects need to be considered.From the perspective of sheet yield,the wedge-shaped area should be as short as possible.At the same time,in order to ensure the smoothness of tension and rolling pressure changes during the flying gauge control and prevent the occurrence of strip breakage accidents,the wedge-shaped area cannot be too short.During the flying gauge control process of a five stand cold rolling mill in a certain steel plant,the setting of the wedge-shaped area was unreasonable.During the tracking of production performance,it was found that there were multiple belt breaks on site,and the mill had to stop and re-thread the belt,greatly reducing production efficiency.Based on the above issues,fully considering the equipment and process characteristics of the rolling mill,and analyzing the control logic during flying gauge control of the unit,the parameterized design of the thickness change curve of the wedge-shaped strip steel was carried out.The differential equation of the tension of the strip steel changing section applicable to flying gauge control was derived,and a relationship model between the tension and velocity in the wedge-shaped area was established.On the basis of the above analysis,with the goal of ensuring uniform transition of continuous rolling and rolling pressure,combined with the limitations of some unit equipment and process conditions,a wedge-shaped area control objective function for flying gauge control was established,and a set of optimization setting technology for wedge-shaped area parameters during flying gauge control of cold rolling unit was developed.This technology can iteratively calculate the

关 键 词：冷连轧 动态变规格 楔形区 轧制速度 张力控制 带钢 断带 轧制力 厚度控制 楔形区优化 

分 类 号：TG335.12[金属学及工艺—金属压力加工]