冷带非稳态轧制弯辊力设定值的研究与应用

为研究非稳态轧制状态下弯辊力对板形的影响,在理论分析和实际应用的基础上,应用力学和控制方法对在非稳态轧制状态下的弯辊力设定值进行了分析.针对在非稳态轧制状态下轧制力、摩擦力和加减速对冷轧弯辊力的影响,提出了冷轧非稳态弯辊力数学模型表达方式.研究表明,弯辊力通过轧制力对弯辊力的影响系数进行动态调整,轧制速度通过摩擦力来影响弯辊力.该模型成功应用于1450冷轧生产线且取得良好的控制效果,为现场调控非稳态弯辊力提供了有力的理论支持.

On the Roll Bending Force Preset for Unsteady Rolling on Cold Strip Tandem Mill

In the cold rolling process in unsteady state, the set value of roll bending force is important to strip flatness control system. Based on both the theoretical analysis and practical applications, the mechanics and control method were applied to analyzing the roll bending force preset, as well as effects of rolling force, friction force and acceleration/deceleration on the roll bending force. A relevant mathematical model was therefore developed in reduced expression. The results indicated that the roll bending force can be readjusted by the influencing coefficient of rolling force on it, while the rolling speed will affect the roll bending force through friction force. This model has been applied successfully to the 1450 tandem mill for cold rolling and achieved good control effect, thus providing theoretically support for controlling the roll bending force in unsteady state.