Analysis and control of chatter marks on cold-rolled steel strip surface
Through the study and analysis of the appearance and mechanism of the chatter marks in a steel mill,it is concluded that the chatter marks are generated through two pathways.Firstly,the rolling mill generates vibrations at a certain frequency,which directly act on the surface of the strip steel to produce chatter marks.Secondly,the existing chatter marks on the surface of the rolls are transferred to the surface of the steel strips.The main drive shaft,roller system,roller bearings,and process lubrication are the main factors affecting the chatter marks.It is possible to control the occurrence of the marks by some measures such as checking the marks on the surface of rolls,monitoring the wear status of the main drive shaft,controlling roll roundness and shaft head wear,cleaning the roller bearings regularly,changing the rolling speed,and maintaining good process lubrication conditions.
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