1220HC六辊冷连轧机振纹实测与抑制  

Measurement and control of chatter marks for 1220HC six-high tandem cold rolling mill

作　　者：陈平[1] 樊华 李俊洪 王海云 陈海周[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030 [2]攀钢冷轧厂,四川攀枝花617062

出　　处：《重庆大学学报（自然科学版）》2011年第11期1-6,共6页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(50974151)

摘　　要：针对某1220HC六辊冷轧机带钢和支撑辊表面振纹问题进行了连续跟踪测试。在对轧机固有特性研究的基础上,通过对支撑辊换辊周期内各阶段振动信号的分析与比较,发现在支撑辊使用早期,轧机以568Hz的第7阶固有振动为主;在稳定轧制阶段,中间辊对支撑辊的相对运动形成支撑辊表面振纹;在支撑辊使用中后期,辊面振纹反作用于轧机,引起轧机强迫振动,进一步加剧振纹的形成,轧机的振动为共振与强迫振动共存。在振纹形成过程分析的基础上,结合振纹纹距与振源的关系,找到了引起轧机第7阶固有频率振动的原因,提出了振纹抑制措施。According to the chatter marks on steel strip and backup roll of 1220HC rolling mill,continuous tracking measurement is carried out.On the basis of researching the mill inherent characteristics,vibration signals in different periods of severing backup rolls are compared,and it is found that,in early stage,the main vibration frequency is 568 Hz which is the 7th natural frequency of the rolling mill,and the relative movement between the middle roll and the backup roll induces chatter marks on the surface of backup rolls in steady rolling stage.In middle and later stage,the backup roll chatter marks react on rolling mill,and the forced vibration is formed.As a result,the vibration model is a coexistence of forced vibration and resonance.Based on the above studies and the relationship of mark spacing and vibration source,the cause of the 7th natural frequency is found and the effective countermeasures are put forward.

关 键 词：冷轧机 振纹 固有频率 强迫振动 

分 类 号：TH113[机械工程—机械设计及理论]