Roll gap of multi-roll straightener

Abstract

The invention discloses a roll gap of a multi-roll straightener, and belongs to the technical field of steel plate straightening. The roll gap equation of a third straightening roll is: k = 1+p-p2 / 2; R=E.t.(1-p) / sigmas, wherein E represents the elasticity modulus of the strip steel, t represents the thickness of the strip steel; and sigmas represents the yield strength of the strip steel, and p represents the proportion of the plastically deforming area in the cross section of the strip steel in a thickness direction. The roll gap is applicable to development of on-line control models. The models developed by using the roll gap are simple and practical; and when the roll gap is used, the residual stress in the strip steel can be eliminated effectively, the quality of the strip profile of the strip steel can be improved, the bearing capacity of the equipment can be lowered, and economic benefits can be increased.

Description

technical field [0001] The invention belongs to the technical field of steel plate straightening, and relates to a roll gap of a multi-roll straightening machine. Background technique [0002] The hot-rolled strip products often have various shape defects. In order to improve the strip shape and reduce the residual internal stress, the strip must be straightened through the elastic-plastic deformation process of the strip by the leveler. Straightening technology is mostly used in the post-process of sheet metal processing, especially finishing and straightening is the final process to fundamentally improve the shape of the plate, which determines the final quality level of the product. Roller straightening machine is widely used in straightening metal sheets and strips of various specifications and materials. The strips continuously pass through the staggered and rotating rollers to obtain repeated and reverse bending. If the roll gap of the straightening rollers is properl...

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Problems solved by technology

The above-mentioned documents only give the calculation model of the roll gap setting of the straightening roller integrated horizontally or obliquely, and the setting calculation is only for eliminating the curvature in the strip length direction, not according to the proportion of the plastic deformation zone being about 80%. At the same time, it is not suitable for the roll gap setting method of the straightening machine where the new straightening roll can independently adjust the roll gap

The latest leveling machine can realize the setting of the reduction of the leveling rollers independently, which provides favorable conditions for the leveling machine to eliminate the residual stress of the strip. However, how to set the gap between the leveling rollers is a difficult point

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