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热轧精轧机组下游机架既要实现板形控制,又要均匀化轧辊磨损以实现自由规程轧制.同时,硅钢、集装箱用钢等专用钢边部减薄严重,常规的板形控制手段难将凸度控制到目标值.开发了非对称工作辊,辊身一端带特殊曲线,上下工作辊成反对称放置.改变轧辊的轴向位置,带钢凸度变化量可超过150μm.设计了针对该工作辊的特定窜辊策略,带钢边部板形可得到有效控制.改善了轧辊磨损辊形,有利于实现自由规程轧制.在鞍钢1700ASP生产线上的使用实绩表明,采用非对称工作辊后,硅钢凸度降低了29.8%,高强度钢的凸度可降至50μm以下,且凸度控制稳定.
The downstream rack of the hot rolling finishing mill not only needs to realize the shape control, but also to homogenize the roll wear to realize the free rolling process.At the same time, the edge of the special steel such as silicon steel and container steel is severely thinned, the conventional form control means It is difficult to control the crown to the target value.An asymmetric work roll has been developed with a special curve on one end of the roll body and an anti-symmetric placement of the upper and lower work rolls.When the axial position of the roll is changed, the variation of the crown of the strip can exceed 150 μm. Aiming at the specific shift strategy of the work roll, the strip shape at the strip edge can be effectively controlled, the roll shape of the roll can be improved, and the free-form rolling can be facilitated. The actual use on the Ansteel 1700ASP production line shows that the asymmetric work Roll, silicon steel crown decreased 29.8%, high-strength steel crown can be reduced to 50μm below, and the crown control and stability.