冷轧酸洗破鳞辊装置的失效分析与改进

宝钢分公司2030冷轧酸洗机组在开卷机处装配有一套破鳞辊装置用来提高酸洗效果.该装置投入使用后,由于破鳞辊处带钢跑偏严重、带钢张力波动过大,一直无法正常使用.通过对同步轴刚度的影响和位置闭环控制方式的分析,提出了改变破鳞辊压下的控制方式、增加破鳞辊的机械刚度、提高液压系统的响应速度等改进措施.实施后,破鳞辊引起的带钢跑偏问题得到解决,从而使酸洗机组工艺段的酸洗效率明显提高,工艺段速度提高8%,产能也相应得到了提高.

Failure Analysis and Improvement of a Removing Scale Roll Unit for the Cold Pickling Line

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.