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《Baosteel Technology》 2006-04
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Failure Analysis and Improvement of a Removing Scale Roll Unit for the Cold Pickling Line

Li Wenyi(Cold Rolling Plant,Baosteel Branch,Shanghai 200941,China)  
In Baosteel Branch's 2030mm Cold Rolling Plant,there is a removing scale unit for improvement of pickling effect close to the pay-off reels of the pickling line.Since it was put into use,the unit has not been in proper use because the strip came off from the line seriously where it met the removing scale roll and the strip tense fluctuated badly.Through analyzing the effect of the synchronous axis rigidity and the closed-loop control mode,some improvements such as changing the roll's screwdown control,enhancing the removing scale roll's mechanical rigidity,and raising the response rate of the hydraulic system,have been advanced.After implementation of the above measures,the problem of the strip deviation has been solved,the pickling line's efficiency improved greatly,the process speed increased by 8%,and the capacity expanded correspondingly.
【CateGory Index】: TG333
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