宽幅森吉米尔二十辊轧机辊系受力及板形影响因素分析

发布时间：2018-06-03 09:14

本文选题：多辊轧机辊系 + 影响矩阵　；参考：《西安建筑科技大学》2017年硕士论文

【摘要】：现阶段薄板和超薄板的冷轧带材生产过程中广泛使用多辊轧机,了解和改善轧机的机械性能,利用多辊轧机的自身特点,通过合理手段进行板形调节,有利于提高板材的力学性能、表面质量和几何精度。探究辊系弹性变形和板形变化之间的关系,研究如何合理的调控手段调节板形,消除板形缺陷,在生产和实践具有指导意义。本文首先介绍了多辊轧机的发展史,阐述了板形和板形控制相关理论的研究现状,主要包括辊系变形理论和金属塑性变形理论,随后对森吉米尔轧机板形调控手段如径向调整和轴向调整手段和原理进行了阐述。利用相关理论,并在考虑到轧辊端部辊颈刚性位移情况下对辊身全长进行网格划分,在弹性简支梁假设基础上采用影响函数法建立了轧机辊系的弹性变形模型,考虑金属横移的影响下利用条元变分法建立了轧件在轧制过程中的金属塑性变形模型,并通过对板厚分布的求解对两个模型进行了整体耦合,达到分析单一变量对板形和辊系受力影响的目的。本文以某型号宽幅二十辊森吉米尔轧机为例,将相关参数代入后利用VC++2010和MATLAB对上述模型方程进行了数值求解和结果处理,通过对多个参数求解出的结果进行单一变量求解分析,阐述了一中间辊横移、一中间辊锥度、二中间辊凸度、工作辊凸度对于有载辊缝、辊间接触力、前张力、金属横向流动以及轧制力分布的影响,探讨了可能引起的板形缺陷,并比对相关文献,验证了模型的可靠性,为实际生产提供了帮助。
[Abstract]:In the process of cold rolling strip production of thin sheet and ultra-thin plate, multi-roll rolling mill is widely used at present to understand and improve the mechanical properties of the mill, and to adjust the shape of the strip by reasonable means by using the characteristics of the multi-roll mill. It is beneficial to improve the mechanical properties, surface quality and geometric accuracy of the plate. It is of guiding significance in production and practice to explore the relationship between elastic deformation of roll system and shape change, and to study how to adjust the shape of plate reasonably and eliminate the defect of shape. In this paper, the history of multi-roll rolling mill is introduced, and the research status of shape and shape control theory is described, including roll deformation theory and metal plastic deformation theory. Then, the means and principle of shape control for Senjimir mill such as radial adjustment and axial adjustment are expounded. Based on the relevant theory and considering the rigid displacement of the roll neck at the end of the roll, the full length of the roll body is meshed. Based on the assumption of elastic simply supported beam, the elastic deformation model of the roll system of the rolling mill is established by using the influence function method. Considering the influence of metal transverse movement, the strip variational method is used to establish the metal plastic deformation model in the rolling process, and the two models are coupled by solving the thickness distribution of the plate. The purpose of this paper is to analyze the influence of single variable on the shape of plate and the force of roll system. In this paper, taking a certain type of wideband 20-roll Senjimir mill as an example, the above model equations are solved numerically and the results are processed by using VC 2010 and MATLAB after the relevant parameters are substituted in the mill. Based on the single variable analysis of the results obtained from the calculation of several parameters, the transverse movement of one intermediate roll, the taper of one intermediate roll, the crown of two intermediate rolls, the crown of work roll for the loaded roll gap, the contact force between rollers, and the front tension are expounded. The influence of metal transverse flow and rolling force distribution on the shape defect is discussed and the reliability of the model is verified by comparing the related literatures.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG333

【参考文献】