轧机整体耦合建模问题研究  

Study on Overall Coupled Modeling of the Rolling Mill

作　　者：曾令强[1] 臧勇[1] 郜志英[1] 刘晓潺 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《机械工程学报》2015年第14期46-53,共8页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51175035);教育部博士点基金(20100006110024);北京高校青年英才计划(YETP0367)资助项目

摘　　要：轧机振动一直是制约轧制发展的重要问题。建立有效的轧机系统动力学模型是研究轧机振动问题的基础,而已有的研究在轧机系统耦合建模方面仍存在着许多不足。通过分析轧机不同类型振动产生的机理及其相互关系,建立能够表征板带轧机垂直-水平-扭转以及轧件水平颤振的耦合振动结构模型;基于Bland-Ford-Hill轧制力模型,并进一步考虑振动状态下辊缝动态变化的影响,建立动态轧制过程模型;在此基础上,将动态轧制力及动态轧制力矩作为反馈激励源,作用于轧机振动结构模型,构建全新的动态轧制过程与轧机系统结构相耦合的轧机颤振整体耦合动力学模型。通过将所建模型的仿真结果与2030冷连轧机组振动测试数据的对比,验证此模型的正确性和有效性。结果表明,轧机颤振整体耦合动力学模型能够合理表征振动过程中轧机系统结构和轧制过程的耦合关系,为深入研究轧机综合振动特性提供理论基础。Mill vibration has been an important issue restricting the development of strip rolling. An effective mill system dynamics model is the basis for studying the mill vibration. But the existing research still has many deficiencies in coupled modeling of the rolling mill. By the analysis of the generating mechanism of different types of vibration and their internal relationship, a coupling vibration structure model is established, in which the vertical vibration, horizontal vibration, torsional vibration and the chatter of rolled piece can be well indicated. In addition, based on the Bland-Ford-Hill rolling force model and considered the dynamic changes of roll gap spacing in the state of vibration, a dynamic rolling process model is formulated. On this basis, taking the dynamic variations of rolling force and rolling torque as the feedback excitation to construct the new overall coupled dynamic model, which can reflect the coupling relationship between the rolling process model and the coupling vibration structure model. The correctness and validity of the overall coupled dynamic model are verified by using the vibration test data of 2030 cold rolling mill. The results show that overall coupled dynamic model can reasonably characterize the coupling relationship between the mill structure and the rolling process. It may be helpful for further study on the coupled vibration characteristics of the rolling mill.

关 键 词：整体建模 轧机 辊缝 动态轧制 耦合振动 

分 类 号：TG331[金属学及工艺—金属压力加工] TH113[机械工程—机械设计及理论]