300冷轧机垂直振动仿真及抑制研究

发布时间：2018-06-20 18:39

本文选题：冷轧机 + 垂直振动　；参考：《石家庄铁道大学》2015年硕士论文

【摘要】：带材轧制过程中的振动问题广泛存在于钢铁工业中。冷轧机的振动不仅会磨损设备、降低轧制精度,甚至还会导致带材断带,给企业带来严重的经济损失。所以,对冷轧机振动特性进行深入研究,可以有效提高带材的质量及产量。论文以300冷轧机为研究对象,通过使用MARC及ADAMS有限元分析软件,结合结构模态和振动特性分析等理论,研究并仿真分析了冷轧机系统多方面的振动特性。首先,利用有限元分析软件MARC,在相关轧制工艺及边界条件下,对带材轧制过程进行了数值模拟仿真,通过分别改变模型中压下量、摩擦系数、轧制速度等工艺参数值的大小来定量的分析带材轧制过程中轧制力的影响,并分析了其对冷轧机振动的影响程度,优化了带材轧制工艺参数。其次,利用Pro/E5.0、ADAMS软件,建立了300冷轧机垂直振动系统的三维装配模型和有限元模型,应用有限元动力学分析方法研究了在优化条件转速下的轧辊的加速度响应情况,得出了轧机上、下工作辊及上、下支承辊的响应加速度的最大值、平均值和均方根值,为进一步抑制轧机垂直振动提供理论依据。最后,以Pro/E中建立的几何模型为基础,建立了冷轧机关键件的有限元模型,并进行了轧机机架、工作辊、支承辊的模态分析。通过分析,了解到通过增大机架与立柱交接处过渡圆角半径的方法减小了该处的应力,避免了共振的发生,提高了轧制精度。对工作辊和支承辊分别提出了倒角改进方案,对倒角改进后的轧辊模型进行了有限元仿真,结果证明,对轧辊倒角的改进可以有效的减小辊系的纵向变形量,从而抑制轧机的垂直振动。本课题的研究不仅对冷轧机垂直振动机理及其抑制方法、冷轧机结构优化设计的进一步研究具有重要的理论意义,还为一些中小型钢厂熟悉冷轧机状况以及对冷轧机的维护提供了参考和依据。
[Abstract]:The vibration problem in strip rolling process exists widely in iron and steel industry. The vibration of cold rolling mill will not only wear the equipment, reduce the rolling precision, but also lead to strip break, which will bring serious economic loss to the enterprise. Therefore, the deep research on the vibration characteristics of cold rolling mill can effectively improve the quality and output of strip. This paper takes 300 cold rolling mill as the research object, through using Marc and Adams finite element analysis software, combined with the theory of structural modal and vibration characteristic analysis, studies and simulates many aspects of vibration characteristics of cold rolling mill system. Firstly, the strip rolling process is simulated by using the finite element analysis software Marc under the condition of relative rolling process and boundary conditions. The reduction and friction coefficient of the model are changed respectively. The influence of rolling force on the rolling force in strip rolling process is analyzed quantitatively, and the influence degree of rolling force on the vibration of cold rolling mill is analyzed, and the process parameters of strip rolling are optimized. Secondly, the 3D assembly model and finite element model of vertical vibration system of 300 cold rolling mill are established by using Pro-E5.0 / Adams software, and the acceleration response of roll under optimized conditions is studied by using finite element dynamic analysis method. The maximum, mean and root mean square values of the response acceleration of the upper, lower and lower work rolls and the upper and lower backup rollers are obtained, which provides a theoretical basis for further suppressing the vertical vibration of the rolling mill. Finally, based on the geometric model established in Pro-E, the finite element model of the key parts of cold rolling mill is established, and the modal analysis of mill stand, work roll and backup roll is carried out. Through analysis, it is found that the stress is reduced, resonance is avoided and the rolling precision is improved by increasing the radius of the transition corner between the frame and the column. For the work roll and the backup roll, the chamfering improvement scheme is put forward, and the improved roll model is simulated by finite element method. The results show that the improvement of the chamfering angle of the roll can effectively reduce the longitudinal deformation of the roll system. Thus the vertical vibration of the rolling mill is restrained. The research of this subject is of great theoretical significance not only to the mechanism of vertical vibration of cold rolling mill and its suppression method, but also to the further study on the optimization design of cold rolling mill structure. It also provides reference and basis for some medium and small steel mills to be familiar with the condition of cold rolling mill and the maintenance of cold mill.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG333

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