The basic equation of packaging steel strip cold rolling process

Packaging steel strip cold rolling process of basic equations is discussed from the Angle of the rolled piece deformation in cold rolling two main process parameters to rolling force and forward slip value. But for dairy process control board with only the Zagreb pieces of plastic deformation is not fully understand the thickness control and flatness control aspects of the actual phenomenon. This is because the milk to produce the plastic deformation at the same time, mill also significantly elastic deformation will occur. By the roll rolling of strip thickness and the crown will decide in Zagreb pieces of plastic deformation and rolling mill ( Roll system) Comprehensive effect of elastic deformation. As the rolled piece is bite roll roll system, will roll to rolled piece rolling thin, make its produce plastic deformation, this roll will give thousands of tons of rolled pieces of rolling force. But force is equal to the reaction ( In the opposite direction. ) 。 So at the same time, the rolled piece will also give thousands of tons of roll system, trying to open roll, make the mill elastic deformation ( Including the bending roll system deformation) 。 If mill memorial arch, roll system with infinite stiffness, is rolling out the shape will be equal to the light of roll gap shape. But in fact mill ( Roll system) Is not only have a limited stiffness and stiffness fairly & other; Soft & throughout; , such as general strip cold and hot tandem mill of the longitudinal stiffness of only 5000 - 6000 kn/mm, so the total rolling force is 25000 - When 30000 kn, memorial arch, the total elastic roll system deformation will reach 5 - 6mm。 For the workpiece zero. 2 - The impact would be huge for 2 mm of hot and cold strip. Thus setting and thickness control function has to analysis of the rolled piece deformation and deformation of the rolling mill. This chapter will from the mill speed coordination between elastic deformation and rolling mill frame cold rolling are discussed from the view of the five basic equations, namely bounce equation, roll gap equation, shape equation, flow equation and the tandem rolling tension equation.