A Periodically Longitudinally Variable Thickness Plate Straightening Device

Abstract

The invention belongs to the technical field of cold rolled strip straightening and particularly relates to a periodical longitudinal variable-thickness plate straightener. The straightener comprises a thickness measuring roll, a speed measuring roll, pinch rolls, work rolls, an upper work roll tilting device, an upper work roll verticality adjustment device and an equipment frame. The work rolls include upper work rolls and lower work rolls, the lower work rolls are mounted on the equipment frame, each upper work roll comprises an upper work roll tilt adjustment part and an upper work roll verticality adjustment part arranged in a front-back manner, each upper work roll tilt adjustment part is connected with the upper work roll tilting device, each upper work roll verticality adjustment part is connected with the upper work roll verticality adjustment device, and the upper work roll tilting device and the upper work roll verticality adjustment part are connected with hydraulic cylinders respectively; the pinch rolls are arranged in front of the upper work rolls and the lower work rolls, and the thickness measuring roll and the speed measuring roll are arranged in front of the pinch rolls, arranged in longitudinal symmetry according to a work center line and driven to rotate by depending on friction with strips. The straightener meets the requirement on alternating straightening of different-thickness parts of plates and the requirement on precise straightening of the different-thickness parts of the plates.

Description

technical field [0001] The invention belongs to the technical field of cold-rolled strip steel straightening, in particular to a periodical longitudinal variable-thickness plate straightening device. Background technique [0002] In the process of rolling, cooling and transportation, various shape defects often occur due to the influence of various factors. For example, plates and strips can produce longitudinal bending, transverse bending, middle scoop and edge wave and camber. In order to eliminate these defects, the rolled piece needs to be straightened. The straightening machine is the equipment that realizes this straightening process. Roller straightening machine is currently the most widely used strip steel straightening machine. The straightening principle is that the plate continuously passes through the staggered and rotating rollers to obtain repeated and reversed bending. If the reduction of the rollers is adjusted properly, the plate with different original c...

AI Technical Summary

Problems solved by technology

[0004] Since the existing straightening machine cannot dynamically change the position of the straightening rollers during the straightening process, this is a problem for periodically longitudinally variable thickness plates (that is, thick areas, transition areas, and thin areas appear periodically in the length direction), especially for longitudinal thickness. Straightening of plates with large differences poses great difficulties

If the reduction of the straightening roller is set according to the thickness of the thick area, the thin area will have no straightening effect due to the small reduction; if the reduction of the straightening roller is set according to the thickness of the thin area, the straightening effect of the thick area will be poor due to excessive reduction. Not good, in addition, indentations are prone to appear on the surface of the thick area, which affects the surface quality; if the reduction of the straightening roller is set according to a certain thickness of the thick area and the thin area, although the thick area and the thin area have a certain degree of straightening , but the straightening effect will not be very good regardless of the thin area or the thick area

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