Method for configuring shape of supporting roll of four-high mill and shape of working roll thereof

Abstract

The invention relates to a method for configuring the shape of a supporting roll of a four-high mill and the shape of a working roll thereof, belonging to the technical field of steel rolling. According to three types of width specifications of band steel which are most rolled by hot-rolling band steel production line, sixth-power polynomial supporting roll shape technology and second-power working roll shape curve are used for configuration so as to lead the contact length of the supporting roll and the working roll and the width of the rolled band steel to be fit. The method has the advantages of eliminating hazardous contact areas in which the parts of the two ends of the supporting roll with the flat roll shape and the working roll expand out of the edge of the band steel to generate large deflection and deformation, solving the problems that the stress concentration of the edges of the supporting roll and the working roll in a hot continuous mill for wide band steel causes stripping and the mill roll with the flat roll shape has large wearing capacity and is not even, reducing the consumption of the mill rill, saving energy, reducing consumption and reducing cost for rolling steel; and by the technical configuration of R2 working roll shape and the supporting roll shape, the invention solves the plate-shape problems that the middle blank generates negative convexity and the wedge shape is large, and improves the control precision of the shape of hot-rolled band steel.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a method for configuring the roll shape of a backup roll and a work roll of a four-high rolling mill. Solve the roll spalling of the four-high roughing mill for hot continuous rolling of wide-band steel and improve the shape technology of the back-up roll and the configuration of the roll shape of the work roll. It is especially suitable for solving the roll problem caused by the contact stress concentration between the roll Spalling, improving the shape of the intermediate slab in the hot-rolled strip rolling process, and improving the shape quality of the hot-rolled strip. Background technique [0002] Plates and strips are widely used in all aspects of industry, agriculture, national defense and daily life, and play an important role in the development of the national economy. The hot continuous rolling mill is a device that processes a billet of a certain ...

AI Technical Summary

Problems solved by technology

[0009]1) Solve the problem of spalling of back-up rolls and work rolls caused by edge stress concentration in hot strip rolling mills;

[0010]2) Solve the problem of large and uneven roll wear and reduce roll consumption;

Contents of the invention

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