冷连轧升降速过程板形变化及其张力补偿技术

 针对冷连轧升降速过程中轧制压力的波动造成冷连轧机组升降速阶段轧制不稳定和板形质量不佳等问题,为了减小轧制力波动,获得优质板形,在结合冷连轧机组的设备及工艺特点的前提下,充分考虑到乳化液流量充足与不足两种情况下轧制速度的波动对轧制压力变化的影响,分析了冷连轧升降速过程中板形演变机理。在此基础上,以冷连轧机组升降速过程中整体轧制压力波动最小为目标函数,开发了一套相应的张力补偿模型,并将其应用到某1 800五机架冷连轧机组的生产实践,取得了良好的使用效果,有效提升了轧制稳定性与板形质量,具有进一步推广应用的价值。

Strip shape change and its tension compensation technology in process of speed increase and decrease of cold continuous rolling mill

Aiming at the problems of unstable rolling and poor shape quality caused by the fluctuation of rolling pressure in the speed increase and decrease stage of the tandem cold rolling process. In order to reduce the rolling force fluctuation and obtain high-quality strip shape,based on the equipment and process characteristics of cold continuous rolling mill,the influence of rolling speed fluctuation on the rolling pressure change under sufficient and insufficient emulsion flow was fully considered,and the shape evolution mechanism in the process of increasing and decreasing the speed of cold continuous rolling was analyzed. On this basis,a set of corresponding tension compensation models was developed and applied to the production of an 1 800 five-stand tandem cold rolling mill with the minimum overall rolling pressure fluctuation during the speed increase and decrease process of the tandem cold rolling mill as the objective function. In practice,good results have been achieved,and the rolling stability and the strip shape quality have been effectively improved,which has the value of further popularization and application.