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 roll shape of a back-up roll of a four-high rolling mill and a method for configuring the roll shape with a work roll. The back-up roll shape technology and the roll shape configuration of the work roll to solve the roll peeling of the four-high roughing mill in the hot continuous rolling of wide-band steel and improve the shape of the intermediate billet, especially suitable for solving the roll caused by the contact stress concentration between the rolls. Peeling, improve the shape of the intermediate billet during the hot-rolled strip rolling process, and improve the shape quality of the hot-rolled strip. Background technique [0002] Sheets and strips are widely used in industry, agriculture, national defense and all aspects of daily life, and play an important role in the development of the national economy. Hot tandem rolling mill is an equipment that p...

AI Technical Summary

Problems solved by technology

[0014] 1) Eliminate the harmful contact area between the flat roll-shaped backup roll and the work roll at both ends of the edge of the strip, and solve the problem of the back-up roll and the work roll due to the edge of the wide-band steel hot continuous rolling unit. Peeling problems caused by stress concentration;

[0015] 2) Solve the problem of large and uneven wear of flat-rolled rolls, reduce roll consumption, save energy and reduce consumption, and reduce rolling costs;

[0016] 3) Through the technical configuration of R2 work roll shape and back-up roll shape, the problem of negative crown and large wedge shape of the intermediate billet has been solved, and the shape control accuracy of the hot-rolled strip has been improved.

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