冷连轧升降速过程板形控制工艺润滑制度优化

doi:10.13228/j.boyuan.issn0449-749x.20210242

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (2031 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In the process of strip speed rise and fall of tandem cold rolling mill, the rolling speed will fluctuate frequently and greatly, and the friction coefficient in the rolling deformation zone will fluctuate greatly, causing the rolling pressure to fluctuate back and forth, resulting in the problem that the shape in the speed rise and fall stage is significantly worse than that in the stable stage. The optimization of process system is very effective for the shape problem caused by friction coefficient. Therefore, firstly, this paper analyzes the shape change process of strip steel in the process of speed increase and decrease under different emulsion concentration, initial temperature and flow rate. In view of the shape defects in the speed up and down stage, the strip steel is divided into several strip elements along the transverse and longitudinal directions by using the piecewise discrete method, the transverse and longitudinal objective functions of the shape in the speed up and down process are proposed, and then the dynamic change objective function of the shape in the speed up and down process is constructed to realize the comprehensive control of the shape fluctuation in the transverse and longitudinal directions in the rolling process. Since the emulsion concentration and initial temperature cannot be changed in the rolling process, combined with the shape objective function, the optimal setting function of emulsion concentration and initial temperature is proposed under the constraints that the strip does not slip and heat scratch and the rolling force of each stand does not exceed the limited rolling force; The emulsion flow optimization can effectively control the frequently changing local wave shape defects. Therefore, the emulsion flow generally changes nonlinearly with the rolling speed. Taking the minimum fluctuation of outlet plate shape as the control function, and taking no slip and thermal scratch and the total amount of emulsion in each frame as the constraint conditions, the emulsion flow following speed optimization function is proposed. Finally, the optimization model is applied to the tandem cold rolling mill of a domestic steel plant. According to the rolling force distribution before and after optimization and the cloud diagram of strip shape, it can be seen that the field application effect is good.

Key words： cold continuous rolling speed up and down technological lubrication flatness control lubrication

Received: 26 April 2021

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	BAI Zhen-hua
	WANG Nan
	CUI Xi-ying
	ZHANG Ya-zhen

Cite this article:

BAI Zhen-hua,WANG Nan,CUI Xi-ying等. Optimization of lubrication system for flatness control process in cold tandem rolling[J]. Iron and Steel, 2021, 56(12): 96-102.

URL:

http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20210242 OR http://www.chinamet.cn/Jweb_gt/EN/Y2021/V56/I12/96

[1] 申立涛,许鹏,张亚震,等. 冷连轧升降速过程板形变化及其张力补偿技术[J]. 钢铁,2021,56(5):72.(SHEN Li-tao,XU Peng,ZHANG Ya-zhen,et al. The shape change and its tension compensation technology during the speed increase and decrease process of cold tandem rolling[J].Iron and Steel,2021,56(5):72.)
[2] 白振华,王松尧,崔亚亚,等. 乳化液流量与速度关系曲线优化设定技术[J]. 钢铁,2017,52(7):58.(BAI Zhen-hua,WANG Song-yao,CUI Ya-ya,et al. Technology for optimizing the setting curve of the relationship between emulsion flow rate and velocity[J]. Iron and Steel,2017,52(7):58.)
[3] 程志彦,崔熙颖,刘云峰,等. 冷连轧以辊耗控制为目标的润滑制度优化技术[J]. 钢铁,2020,55(12):61.(CHENG Zhi-yan,CUI Xi-ying,LIU Yun-feng,et al. Optimization technology of lubrication system for cold tandem rolling with roll consumption control as the goal[J]. Iron and Steel,2020,55(12):61.)
[4] 刘学良,柯于军,潘东远. 高速冷连轧过程中乳化液流量的优化控制[J]. 轧钢,2019,36(1):46.(LIU Xue-liang,KE Yu-jun,PAN Dong-yuan. Optimum control of emulsion flow rate during high-speed tandem cold rolling[J]. Steel Rolling,2019,36(1):46.)
[5] 宋和川. 冷连轧过程轧制压力倒挂形成机理及其治理技术的研究[D].秦皇岛:燕山大学,2017.(SONG He-chuan. Research on the Formation Mechanism of Rolling Pressure Upside-Down During Cold Tandem Rolling and Its Treatment Technology[D]. Qinhuangdao:Yanshan University,2017.)
[6] 唐水清,陆兆刚,张栋梁. 冷轧机组乳化液流量控制系统的改进[J]. 金属世界,2020(4):65.(TANG Shui-qing,LU Zhao-gang,ZHANG Dong-liang. Improvement of emulsion flow control system of cold rolling mill[J]. Metal World,2020(4):65.)
[7] 张苗兴. 八辊五机架冷连轧机组核心工艺参数设定技术的研究[D]. 秦皇岛:燕山大学,2018.(ZHANG Miao-xing. Research on Core Process Parameter Setting Technology of Eight-High Five-Stand Tandem Cold Rolling Mill[D]. Qinhuangdao:Yanshan University,2018.)
[8] 圣洁. 冷轧过程中乳化液润滑性能数值仿真分析[D]. 上海:华东理工大学,2011.(SHENG Jie. Numerical Simulation Analysis of Emulsion Lubrication Performance During Cold Rolling[D]. Shanghai:East China University of Science and Technology,2011.)
[9] 徐俊,邱格君,白振华. 高速冷连轧时工艺润滑的优化技术[J]. 轧钢,2005,22(5):12.(XU Jun,QIU Ge-jun,BAI Zhen-hua. Optimization technology of process lubrication in high-speed tandem cold rolling[J]. Steel Rolling,2005,22(5):12.)
[10] 崔二宝,孙蓟泉,刘玉金. 乳化液在冷轧润滑过程中的应用分析[J]. 中国科技信息,2008 (21):142.(CUI Er-bao,SUN Ji-quan,LIU Yu-jin. Application analysis of emulsion in cold rolling lubrication process[J]. China Science and Technology Information,2008(21):142.)
[11] 白振华,侯彬,宋和川,等. 冷连轧过程乳化液流量综合优化设定技术[J]. 钢铁,2017,52(3):58.(BAI Zhen-hua,HOU Bin,SONG He-chuan,et al. Comprehensive optimization setting technology of emulsion flow rate in cold tandem rolling process[J]. Iron and Steel,2017,52(3):58.)
[12] 齐海峰,张晓峰,唐伟,等. 极薄板高速轧制热划伤缺陷控制技术[J]. 中国冶金,2020,30(1):79.(QI Hai-feng,ZHANG Xiao-feng,TANG Wei,et al. Control technology of thermal scratch defects in high speed rolling of very thin plate[J]. China Metallurgy,2020,30(1):79.)