多源激励下冷连轧F5轧机振动问题研究  

RESEARCH ON THE VIBRATION OF COLD ROLLING MILL F5 UNDER MULTI-SOURCE EXCITATION

作　　者：张义方 肖彪 闫晓强[2] ZHANG Yi-fang;XIAO Biao;YAN Xiao-qiang(College of Engineering,Shanghai Polytechnic University,Shanghai 201209,China;School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]上海第二工业大学工学部,上海201209 [2]北京科技大学机械工程学院,北京100083

出　　处：《工程力学》2022年第2期235-243,共9页Engineering Mechanics

基　　金：国家科技支撑项目(2015BAF30B01);上海市自然科学基金项目(20ZR1421000);上海第二工业大学校基金项目(EGD20XQD07)。

摘　　要：某厂1550冷连轧机在轧制薄规格带钢时F5轧机发生强烈振动,现场测试发现振动谱图中存在144 Hz的优势频率,经分析与F5轧机固有频率接近,同时发现带钢激励谱图与压下系统伺服阀输出油压谱图中存在多个激励频率。为探索振源并抑制振动,依据工业现场实验得出振动是由带钢与液压压下系统共同激励诱发产生。通过求解带钢-液压压下激励模型并仿真分析获得不同激励频率组合形式对轧机系统的影响特性,基于此提出一种通过在压下控制系统中添加抑振器来抵消特定频率从而获得预想组合激励形式的方法来抑制振动,实施后获得良好抑振效果。研究内容为分析冷连轧机振动机理和拓展轧机抑振方法提供参考。Serious vibration occurred on the F5 stand when producing thin strips on a 1550 cold tandem mill.The field test showed that the dominant frequency of the vibration is 144 Hz,which was close to the natural frequency of the F5 stand.Moreover,there were many excitation frequencies in the strip excitation spectrum and the servovalve pressure spectrum of the screwdown system.To explore the vibration source and suppress the vibration,the industrial field experiment was conducted to concluded that the vibration was affected by the joint excitation of strip steel and the hydraulic screwdown system.The characteristics of different frequency combination acting on the mill were obtained by solving the model of the strip-screwdown excitation.A method was proposed to suppress the vibration.It used the desired excitation combination by adding the vibration suppressor in the control system to eliminate a specific frequency.The satisfactory suppression effect was obtained after the implementation.The research provides a reference for analyzing vibration mechanism of cold tandem mill and expands the method of vibration suppression.

关 键 词：冷连轧机 工业现场实验 多源激励 垂直振动 振动抑制 

分 类 号：TG333[金属学及工艺—金属压力加工] TH113.1[机械工程—机械设计及理论]