Based on the equipment features and process state of rolling products, a computer simulating program for roll shape of support roll in 2300 four-high mill is developed, which can be used within a large range of width of rolling products.

Modelling study of the elastic deformation for 4-h mill;

This paper was to discuss the elastic deformation of rollers and interaction between work rollers and the strip during the roller milling process of a 4-h mill,by analyzing stress and deformation of rollers,put forwards a concise and practicable mathematic model of roller gap's shape,which resulted from some relevant factors,such as rolling pressure,bending force and so on.

The axial overload is the main factor which causes work roll bearings and back up thrust bearings of four high mill invalid.

The finite element method is used to solve the deflection of rolls for 4-high mill.

Influence of axial function at rolls in four-high mill upon the service life of roll bearing;

Free transverse vibration of rolls for four-high mill

For 2800mm 4-high mill, PMR (Plate Mill Backup Rolls with Variable Contact-Length), PWR (Plate Mill Work Rolls used for "deadflat" plate rolling) and a series of work roll contours configured for PMR are developed.

Introducing the simulation software based on influence function method for the elastic deformation of a 4-high mill system into computation of workpiece shape control process,the reason why the calculated average crown values of rolls are different from the relevant setup parameters are discussed and compared.