Mechanism of the Strip Surface Chatter Marks of the 1220 Cold Rolling Mill
XIE Chang-gui1,2,ZENG Hai2
1.School of Mechanical Engineering, Chongqing Vocational Institute of Engineering, Chongqing 402260, China;
2.State Key Lab of Mechanical Transmissions, Chongqing University, Chongqing 400030, China
Abstract：Aiming at a 1220 strip surface, where the cold rolling mill had chatter marks, on which the reasons for the formation was tracked tested for in-depth study.Based on the vibration test, the analysis was given to the dynamic characteristics of the rack and the various phases of work rolls in the cycle on vibration signal.It was found that in its middle or late phase of the backup roll being used, the mill mainly worked with the 7th-order natural vibration at app.600Hz. When the rolling speed was maintained in the stable middle-/high-speed rolling phase, the relative movement of the work roll to the intermediate roll caused the formation of the chatter marks in the work roll surface.This had reaction to the mill that caused the forced vibration mill to further accelerate the formation of chatter marks, where mill vibration came along with both the resonance and forced vibration.In the analysis of the mechanism on the chatter marks, the relationship between chatter marks spacing and vibration source was considered in successfully finding out the cause of the 1220 mill chatter marks generated, and then the chatter marks suppression measures were proposed with satisfied effects.
谢长贵,曾海. 1220冷连轧机带钢表面振纹机理的研究[J]. 计量学报, 2015, 36(6): 595-598.
XIE Chang-gui,ZENG Hai. Mechanism of the Strip Surface Chatter Marks of the 1220 Cold Rolling Mill. Acta Metrologica Sinica, 2015, 36(6): 595-598.
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2015, Vol. 36 
