摘要
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。
To realize the high precision control of hot rolled strip,in accordance with the characteristics of finishing train of hot strip mill： crown is controlled in the upper stream stands and flatness is realized in the down stream stands,one set roll contour configuration technology was developed and applied in 1580 mm hot strip mill of Qian＇an Iron and Steel Company of Shougang Group.Negative crown contour was employed on work rolls of F1 stand to enhance the alignment during the rolling.CVC（Continuous Variable Crown） with lower thrust force was employed on work rolls from F2 to F4 to carry out the crown control function.Negative crown contour was adopted on work rolls of down stream stands F5 to F7 to control the flatness quality with a combination with the cyclic long stroke work roll shifting for the roll wear dispersing.VCR（Variable Crown Back-up Roll） contour was employed on all back-up rolls of the finishing mill to increase the cross rigidity of roll stack.After this roll contour configuration technology was utilized,strip shape control with a high accuracy of more than 95% and schedule-free rolling within a certain range have been realized,meanwhile the rolling stability and the length of rolling campaign have been improved and increased,respectively.
出处
《钢铁》
CAS
CSCD
北大核心
2013年第1期59-64,69,共7页
Iron and Steel
关键词
热连轧机
辊形配置
平坦度
自由规程轧制
凸度
hot rolling mill
roll contour configuration
flatness
schedule-free rolling
crown
