摘要
热轧精轧区域以厚度、宽度、温度、板型为控制目标,预计算模型设定信息由轧制力、机架间冷却水流量、弯辊力、窜辊位置等组成。基于速度、力、温度之间的可量化关系,在不改变负荷分配的基础上,综合考虑穿带速度、轧制力、轧制功率、机架间冷却水流量之间的相互影响,提出通过带钢头部设定值结合轧制速度曲线与终轧温度控制策略,对带钢全长进行设定计算的全长多点设定模型。传统头部预设定模型无法对带身轧制力、终轧温度极大极小点进行有效预测,难以抑制带钢全长精度波动,产品精度难以提升。计算结果表明,全长多点设定模型可预设带钢终轧温度与轧制力全长控制参数、预判设备能力,提升热轧产品精度与轧制稳定性。
Thickness,width,temperature,and profile are considered as control targets in process control of hot strip finishing rolling.The pre-calculated settings of the model information include rolling force,cooling water flow between stands,bending force,and roll shifting position.Without changing the load distribution,the interaction among thread speed,rolling force,rolling power,and cooling water flow between stands is comprehensively considered based on the quantifiable relationship among speed,force,and temperature.This paper proposes a full-length multi-point-setting model that uses the settings of strip head to combine the rolling speed curve with the target finishing mill delivery temperature(FDT)to achieve the calculation of the control parameters along full length of strip.Traditional models cannot effectively predict rolling force of strip body or the maximum and minimum temperatures of FDT.It is also difficult for traditional models to suppress fluctuations in shape accuracy of full-length strip or improve the shape accuracy of product.Calculation results show that the proposed full-length multi-point-setting model can provide the control parameters for temperature and rolling-force over full length of strip,predict the risk of rolling exceeding the equipment capability,and improve the shape accuracy and rolling stability of hot-rolled products.
作者
徐耀
张晓峰
XU Yao;ZHANG Xiaofeng(Research Institute, Baoshan Iron & Steel Co. ,Ltd. , Shanghai 201999, China)
出处
《宝钢技术》
CAS
2020年第4期21-26,共6页
Baosteel Technology
基金
国家重点研发计划(2017YFB0304100)。
关键词
热连轧
精轧
全长多点设定
hot continuous rolling
finishing rolling
full-length multi-point setting
作者简介
徐耀,工程师,1984年生,2007年毕业于辽宁工程技术大学,现从事冶金专业研究,电话:26641067,E-mail:xuyo@baosteel.com。
