【作者】 石晓玉；

【导师】 王勇勤；

【作者基本信息】 重庆大学 ， 机械设计及理论， 2004， 硕士

【摘要】 板形是板带产品的重要质量指标之一，而板形控制是板带产品质量保证体系中一个非常重要的环节。为了满足现代板带生产的高质量和高生产率，不仅要求板形控制具有较高的精度，而且还要有较强的在线可调性。特别是在AGC系统的广泛采用后，就使得板形控制这一问题变得更加日益突出。 目前，由于国内的中厚板轧机数量较少，特别是辊身长度在3000mm以上的轧机仅有6套，因此关于3500轧机的板形控制研究与分析在国内基本上属于空白。本文结合国家重大技术装备研制项目(科技攻关)“70MN强力高刚度轧机及其传动系统研制”的要求，对上述问题进行了深入系统地研究。 首先，通过分析目前各种板形调节装置的优缺点，确定出3500轧机的板形调节装置；在此基础上，通过研究和分析现有各种轧辊弹性变形理论(如简支梁法、合成梁法、弹性基础梁法、影响函数法等)及常见的三种板凸度数学模型，利用材料力学和理论力学的相关理论知识，推导出工作辊凸度的理论计算公式；由于该计算公式较为复杂，难以得到在线的应用，因此采用了大型有限元分析软件ANSYS建立了板凸度计算的有限元模型，其主要包括板带宽度、轧制力、工作辊直径、支承辊直径、轧辊接触长度、正弯辊力及弯辊作用距离与板凸度之间关系的7个有限元子模型，同时对每种工况选取多组数据进行了求解，然后将计算结果利用MATLAB拟合出上述7个子模型的相应计算表达式；最后还比较了两种模型的计算结果，指出各自的优缺点，为下一步有限元模型的进一步完善提出建议。 在理论分析计算的基础上，利用PowerBuilder编程工具完成了“板凸度及弯辊力求解”软件的编制，所编制的软件界面友好、功能齐全，具有较强的辅助设计作用。 该课题在国内外相关资料缺乏的条件下，独立完成了板凸度的理论分析和有限元建模，从而为板形的在线控制和调节提供了较为简单和实用的数学计算公式，其成果具有一定的先进性。更多还原

【Abstract】 Profile is the most important index of strip quality, and that profile control is a key part of strip quality control system. For the demand of high quality products and high productivity in strip milling, profile control is expected to have higher precision and higher on-line regulation. Especially, profile control becomes more and more important with the abroad application of AGC system.At present, the number of Medium and Heavy Plate Mill is few, especially the number of mill whose roll length larger than 3000mm is 6, so the research and analysis about profile control for 3500mm mill is seldom in domestic plants. The paper makes further research on it by analyzing the national key scientific and technological equipment item "the Research on 70MN High Rigidity Rolling Mill and it’ s transmission".Firstly, we ensure the regulating equipment for profile of 3500mm mill by analyzing the advantages and disadvantages of differ regulating equipments for profile. Following, we elicit the computing formulas about work roll crown, on the basis of the research and analysis on differ elastic deformation theories of rolls (for example, the method of freely supported beam , the method of composite beam, the method of spring beam , the method of influence function, et) and three mathematics models on strip crown, by the speculative knowledge of mechanics of materials and theoretical mechanics. Because of the complexity of these computing formulas, we build seven differ finite element models, which include the finite element model between strip width and strip crown, the finite element model between work roll diameter and strip crown et, by ANSYS. At the same time, we calculate each instance by choosing a series of data. With that, we elicit seven computing formulas from these computed results by MATLAB. Finally, we table a proposal for perfecting the finite element model by comparing the result of finite element model with the result of theory model.On the basis of these theoretical analysis and calculate, we complete the program for "solve for strip crown and bending work roll force" software by PowerBuilder. The software has friendly interface and integrated function, and powerfully aided design.Under the circumstances of lacking information internationally and domestically, we independently complete the theory analysis and the finite element analysis about strip crown. Thus, we provide some more simple and practical computing formulas for regulating on-line profile, which keeps ahead in domestic.更多还原