Gauge and shape control strategy for DC mill

The simulation of DC mill rolling process was carried out by using the strip element method and the Stone formula to analyze the three-dimensional plastic deformation of strip,and by using the influencing coefficient method to analyze the elastic deformation of rolls system.And the gauge and shape control characteristics of DC mill were analyzed,and the corresponding control strategy was given out.The results show that the improved model has high reliability and accuracy.The work roll offset has some influence on shape,the work roll cross has more ability to control crown and shape than the work roll bending.Both the cross and roll-bending impact on distribution force between rolls are very big,excessive cross angle makes peak force on roll's central,and excessive roll-bending force makes peak force on roll's edge.The reduction way is rough-adjusting,and the work roll offset way is micro-adjusting in gauge control.The offset,cross angle and roll-bending force are setting reasonable,the work roll bending is more used as online dynamic shape control means.In the whole process of shape setting and dynamic control,the force between rolls distributes uniform when the cross angle and the roll-bending force under reasonable using,in order to reduce the peak of roll bending force and reduce the non-uniform coefficient of distribution force between rolls.