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为了实现热轧宽带钢板形的高精度控制,根据宽带钢热连轧精轧机组上游机架控制凸度与下游机架控制平坦度的特性,在首钢迁钢1 580mm热连轧生产线的精轧机组开发并应用了成套辊形配置技术。在F1机架工作辊采用负凸度辊形,加强带钢轧制过程的对中;在F2到F4机架工作辊应用低轴向力CVC辊形,对带钢进行凸度调控;在F5到F7机架工作辊上采用负凸度辊形,辅以长行程的工作辊周期性窜辊,均匀轧辊磨损,控制带钢的平坦度;在所有机架的支撑辊上采用VCR变接触式辊形,增加机架的横向刚度。采用此辊形配置后,带钢的板形控制精度达95%以上,同时,改善了带钢轧制稳定性,延长了轧制计划长度,实现了一定范围的自由规程轧制。
In order to realize the high-precision control of hot-rolled wide strip shape, according to the characteristics of upstream rack control convexity and downstream rack control flatness of hot strip mill in Shougang Group, The unit developed and applied a complete set of roll configuration technology. In the F1 rack work roll negative convex roller shape, to strengthen the strip rolling process center; in the F2 to F4 frame work roll low axial force CVC roll shape, the strip crown regulation; in the F5 The work roll to the F7 with negative convex roller shape, combined with long-stroke work roll cyclical shift roller, uniform roll wear and tear, strip flatness control; support roller in all the rack with VCR variable contact Roll-shaped, increasing the rack’s lateral stiffness. With this roller configuration, strip shape control accuracy of more than 95%, while improving strip rolling stability, extended rolling schedule length, to achieve a range of free-schedule rolling.