冷连轧机核心工艺数学模型的开发与研究
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摘要
随着冷连轧板带技术的发展,对冷连轧机的产量和产品质量都提出了越来越高的要求。而冷连轧生产的工艺数学模型是冷连轧生产的关键技术。如何通过理论与实践的结合进一步改进冷连轧的工艺数学模型,从而提高冷连轧的轧制速度和带材表面质量具有很高的理论意义和应用价值。
从金属学的角度,考虑到热轧来料的碳当量、终轧温度和卷取温度对组织结构和机械性能都存在着影响,而且这些参数控制又存在着波动,结合大量的现场数据分析,找出其中的规律性,对热轧来料初始变形抗力进行修正;另外,从塑性变形力学的角度,鉴于冷连轧的轧制速度高,轧件变形速度快的特点,在变形抗力模型中引入变形速度这一影响因素,对变形抗力模型进行修正。
在建立了润滑油膜厚度与摩擦系数关系的基础之上,结合流体动力学和热力学原理,通过分析乳化液的浓度、流量、初始温度以及品质等因素对轧制变形区温度场的影响机理,找出乳化液与油膜厚度之间的关系,从而建立工艺润滑制度与摩擦系数之间的工艺模型,并定性的分析工艺润滑制度各控制参数对摩擦系数的影响。
在连轧理论的基础之上,采用逐机架多目标的优化思想,以第五机架出口板形良好,1-5机架负荷分配均匀为目标,并充分考虑到咬入角、打滑等约束条件,对冷连轧生产过程的压下分配和张力制度进行综合优化。
Along with the technical development of cold rolled steel strip, more and more high demand has been put forward to the output of cold tandem mill and the product quality. But the technologic mathematical model of the cold tandem rolling production is it key technique. It has very important theory significance and appliance value that how to further improve technologic mathematical model of the cold tandem rolling through the combination of theory and experience and then improve rolling speed of cold tandem mill and surface quality of steel strip.
On the point of metallic phase, considering that equivalent weight of carbon, finished-rolling temperature and crimp temperature of hot rolling steel strip which controlled exist fluctuate affect its structure and machine capability, and combining a mass of field data analysis and then find out its rule, the resistance of deformation of hot-rolling finished steel strip is emended; besides, on the point of plastic yield mechanics, whereas the characteristic of very high rolling speed of cold tandem mill and very rapid speed of deformation of rolled piece, the factor of speed of deformation will be inducted the model of resistance of deformation, which may emend the model of resistance of deformation.
On the base of the relation of lubricating oil film thickness and friction, combining the theory of hydrokinetics and energetics, then the technology model between greasing system and friction will be put forward through analyzing the affect mechanics of the consistency, flux, initial temperature and trait of oil water emulsion to temperature field and finding out the relationship between lubricating oil film thickness and oil water emulsion, on the same time, qualitatively analyse how to affect friction by the controlled parameter ofgreasing system.
On the base of tandem theory, introducing the optimization idea which has several optimization object and adopt a point-by-point framework method, depress allocation and tension system will be optimized integratived in the production process of cold tandem mill which take good shape of strip of the fifth framework and symmetrical allocation of burden of from one framework to five framework as optimization object and abundantly considering several constraint condition such as nip angle and slipping.
从金属学的角度,考虑到热轧来料的碳当量、终轧温度和卷取温度对组织结构和机械性能都存在着影响,而且这些参数控制又存在着波动,结合大量的现场数据分析,找出其中的规律性,对热轧来料初始变形抗力进行修正;另外,从塑性变形力学的角度,鉴于冷连轧的轧制速度高,轧件变形速度快的特点,在变形抗力模型中引入变形速度这一影响因素,对变形抗力模型进行修正。
在建立了润滑油膜厚度与摩擦系数关系的基础之上,结合流体动力学和热力学原理,通过分析乳化液的浓度、流量、初始温度以及品质等因素对轧制变形区温度场的影响机理,找出乳化液与油膜厚度之间的关系,从而建立工艺润滑制度与摩擦系数之间的工艺模型,并定性的分析工艺润滑制度各控制参数对摩擦系数的影响。
在连轧理论的基础之上,采用逐机架多目标的优化思想,以第五机架出口板形良好,1-5机架负荷分配均匀为目标,并充分考虑到咬入角、打滑等约束条件,对冷连轧生产过程的压下分配和张力制度进行综合优化。
Along with the technical development of cold rolled steel strip, more and more high demand has been put forward to the output of cold tandem mill and the product quality. But the technologic mathematical model of the cold tandem rolling production is it key technique. It has very important theory significance and appliance value that how to further improve technologic mathematical model of the cold tandem rolling through the combination of theory and experience and then improve rolling speed of cold tandem mill and surface quality of steel strip.
On the point of metallic phase, considering that equivalent weight of carbon, finished-rolling temperature and crimp temperature of hot rolling steel strip which controlled exist fluctuate affect its structure and machine capability, and combining a mass of field data analysis and then find out its rule, the resistance of deformation of hot-rolling finished steel strip is emended; besides, on the point of plastic yield mechanics, whereas the characteristic of very high rolling speed of cold tandem mill and very rapid speed of deformation of rolled piece, the factor of speed of deformation will be inducted the model of resistance of deformation, which may emend the model of resistance of deformation.
On the base of the relation of lubricating oil film thickness and friction, combining the theory of hydrokinetics and energetics, then the technology model between greasing system and friction will be put forward through analyzing the affect mechanics of the consistency, flux, initial temperature and trait of oil water emulsion to temperature field and finding out the relationship between lubricating oil film thickness and oil water emulsion, on the same time, qualitatively analyse how to affect friction by the controlled parameter ofgreasing system.
On the base of tandem theory, introducing the optimization idea which has several optimization object and adopt a point-by-point framework method, depress allocation and tension system will be optimized integratived in the production process of cold tandem mill which take good shape of strip of the fifth framework and symmetrical allocation of burden of from one framework to five framework as optimization object and abundantly considering several constraint condition such as nip angle and slipping.
引文
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43 Kazuhiro Yahiro,et al.Development of Cooling Temperature Control System on Hot Strip Mill.In:Kawasaki Steel Technical Report No.24.April,1991
44 QIN Guo-qing,XIONG Xiao-ming. Analysis on Water Curtain Cooling of Steel Plate.Journal of Iron and Steel Research.2000,12(1):63-66
45 Martin D,leitholf,J Richard Dahm.Model Reference Control of Runout Table Cooling at LTV.Iron and Steel Engineer,1989,6(8):31-35
46 连家创,刘宏民. 板厚板形控制.北京:兵器工业出版社,1996.4:67-98
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2 伍仲华.浅析我国冷轧(宽)板带的发展空间.重型机械科技,2004,(3):52-54
3 王泰昌,宋加.我国宽、窄带钢的发展和经济分析.冶金管理,2004,(1):31-34
4 邬月兔.国内外冷轧机发展综述.江苏冶金,1989,(1):27-31
5 王延溥.轧钢工艺学.北京:冶金工业出版社,1981:348-349
6 胡国栋.轧钢生产工艺及设备.河北:燕山大学,2000:171-205
7 邹家祥.轧钢机械.北京:冶金工业出版社,1995:1-20
8 杨美顺.现代冷轧机发展现状及展望.中国冶金,2004,(10):13-17
9 杨节.轧制过程数学模型.北京:冶金工业出版社,1993.10:40-80
10 王克智,欧光辉等译.轧制原理手册.北京:冶金工业出版社,1989.7:50-120
11 连家创.带钢连轧机计算机控制工艺基础和数学模型.东北重型机械学院,1977.3
12 赵志岗译.材料力学(第四版).科学出版社,2002:55-90
13 胡人礼译.材料力学.科学出版社,1978:120-178
14 岳海龙,刘力,邹家祥. 高速冷轧过程变形抗力及延伸率的研究. 重型机械,1994
15 刘力,藏勇,邹家祥等.冷轧 IF 钢变形抗力及机械性能的研究.冶金设备,2001.2
16 胡德林主编.金属学原理.西安:西北工业大学出版社,1987.5:90-105
17 哈宽富著.金属力学性质的微观原理.北京:科学出版社,1983:77-89
18 林志平译.金属与合金的塑性变形抗力.北京:机械工业出版社,1984.2:132-154
19 日本钢铁协会.板带轧制理论与实践.北京:中国铁道出版社.1990:181-208
20 Sander Progress in Hot Rolled Flat Product Technology for Demanding Customer.Iron and Steelmaking,1995,(2):12-23
21 Hans Dieter Manfired Spangenbarg. UTHS System a Technology to Produce Hot Strip in Thin Gauge.MPT,1994,(1):3-8
22 Guo Jianbo,Lian Jiachuang, Pan Changfen,et al.Simulation and Experi-mental Investigation of Strip Profile on Hot Strip Finishing Mills. Iron and Steel.1999,34(5)
23 李小玉,顾正秋等译.轧制工艺润滑.北京:冶金工业出版社,1981.8:80-110
24 温诗铸,杨沛然著.弹性流体动力润滑.北京:清华大学出版社,1992.9:100-150
25 汪一麟等译.实用摩擦学.上海:上海科学技术出版社,1984.5:68-79
26 汪德涛等编.润滑技术手册.北京:机械工业出版社,1999.4:203-260
27 周焕勤译.润滑.Vol 29,No 11.1984:29-36
28 李虎兴编.压力加工过程的摩擦与润滑.北京:冶金工业出版社,1993.10:134-167
29 温诗铸.摩擦学原理.北京:清华大学出版社,1990.1:10-70
30 连家创,白振华.《宝钢 2030 冷连轧机工艺润滑制度研究》技术开发研究报告.宝山钢铁股份有限公司,2003
31 赵振择,邵明志,张召择等著.金属塑性成型中的摩擦与润滑.北京:化学工业出版社,2004:56-87
32 杨秉陆编.润滑油脂和应用.北京:地震出版社,1994:99-156
33 张志红.不锈钢薄板在中高压状态下滑动摩擦机理研究. 济南,山东大学,2002
34 孙建林,康永林,刘杰.带钢冷轧形膜的特征.钢铁研究学报.,2001.2
35 王占学.控制轧制与控制冷却.北京:冶金工业出版社,1988.3:87-120
36 W.M.罗森诺,等.传热学手册(上册).李荫亭等译.北京:科学出版社,1985:552-685
37 W·M·凯斯,M.E·克拉福特.对流传热与传质.北京:科学出版社,1986.5:45-60
38 詹宗勉.工程热力学和传热学.大连:大连海事大学出版社,1995:209-215
39 章熙民,任泽霈,梅飞鸣等.传热学.第二版.北京:中国建筑出版社,1985:98-128
40 李曼云,孙本容.钢的控制轧制和控制冷却技术手册.北京:冶金工业出版社,1990:65-79
41 王新海.轧制油乳化液的分析与研究.钢铁研究,1994.11
42 Kazunari Momose,Hideo Kimoto.Effects of an unsteady thermal boundary condition on forced convection heat transfer. Iron and Steel Engineer.2002,31(3)
43 Kazuhiro Yahiro,et al.Development of Cooling Temperature Control System on Hot Strip Mill.In:Kawasaki Steel Technical Report No.24.April,1991
44 QIN Guo-qing,XIONG Xiao-ming. Analysis on Water Curtain Cooling of Steel Plate.Journal of Iron and Steel Research.2000,12(1):63-66
45 Martin D,leitholf,J Richard Dahm.Model Reference Control of Runout Table Cooling at LTV.Iron and Steel Engineer,1989,6(8):31-35
46 连家创,刘宏民. 板厚板形控制.北京:兵器工业出版社,1996.4:67-98
47 连家创,白振华.《宝钢 2030 冷连轧机轧制打滑对策研究》技术开发研究报告.宝山钢铁股份有限公司,2003
48 白振华,连家创,王骏飞,等.冷连轧机以预防打滑为目标的压下规程优化研究.钢铁,2003.10
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