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| Optimal setting technology of process lubrication system for 3+1 emulsion system |
| LI Xue-tong1,2, SUN Ye-xuan1, LIU Ya-xing1, REN Ming-hua1, TAN Chao-chao1, JIA Wen-qiang1 |
1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, Hebei, China;
2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China |
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Abstract In order to study the quality difference between the upper surface and the lower surface of the cold-rolled strip due to insufficient lubrication,over-lubrication and insufficient cooling in the rolling deformation zone to produce stainless steel products with a 3+1 emulsion system,a certain steel the newly-built six-stand tandem cold rolling mill is the research object. From the perspective of emulsion process lubrication,the layout of the 3+1 type emulsion process lubrication system of the mill is introduced,and the influence of process lubrication system parameters on rolling stability is analyzed. factor. By revealing the intrinsic relationship between the concentration,temperature and flow rate of the emulsion and the dynamic viscosity of the lubricating oil film,a model of the relationship between the emulsion process lubrication system and the thickness of the lubricating oil film was established;further,starting from the friction heat and deformation heat,combined with the convective heat transfer mechanism of heat transfer,established the relationship model of emulsion process lubrication system and cooling effect; and based on this,established the relationship model of process lubrication system,slip and thermal slip. With the goal of maximizing the comprehensive control of the rolling stability of the upper surface of the strip,the stability of the lower surface of the rolling,the difference in lubrication of the upper and lower surfaces of the strip,and the cooling effect of the emulsion,the process of the 3+1 emulsion system has been developed. The comprehensive optimization setting technology of the lubrication system realizes the quantitative optimization of the emulsion concentration,temperature and flow rate of the 3+1 type emulsion system. This technology has been promoted and applied to a six-stand tandem cold rolling mill in a steel plant. The application results show that the optimization method fully exploits the overall lubrication and cooling capacity of the 3+1 emulsion system and ensures that the six-stand tandem cold rolling mill The rolling stability of each stand greatly reduces the difference in the quality of the upper and lower surfaces of stainless steel products,creates greater economic benefits for the site,and has the value of further popularization and application.
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Received: 24 June 2021
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2022, Vol. 57 
