Heart-shaped roll defect treatment method for cold-rolled steel roll

Abstract

The invention discloses a heart-shaped roll defect treatment method for a cold-rolled steel roll. The method comprises the following steps executed by a computer of: 1. collecting relevant parameters of site winding equipment and specification of a product; 2. classifying site sleeves; 3. calculating radial stress of steel rolls of all specifications at each moment during cooling; 4. calculating unstability critical stress sigmag0i and steel roll unstability factor value etami under a normal production condition; 5. sequencing and defining unstability factors and calculating a reference steel roll unstability factor etamomin; 6. performing feature parameter optimization on the sleeves of the product; and 7. calculating the unstability factor eta of a steel roll to be treated. By the method, on the premise of reducing the disposable equipment modifying cost and the equipment transferring cost to the maximum extent, the defects of a heart-shaped roll can be effectively overcome, and the good steel roll quality can be effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of cold rolling in the metallurgical industry, and in particular relates to a technology for treating defects of cold rolled steel coils. Background technique [0002] In recent years, with the rapid development of the strip industry, users have put forward higher and higher requirements for the quality of strip products. During the unloading and cooling process of the cold-rolled strip after coiling, for steel coils with small thickness and many layers, due to the withdrawal of the coil, the strength or rigidity of the sleeve in the steel coil is insufficient. The sudden instability of the inner ring of the steel coil will cause partial or large-scale collapse, resulting in the so-called "heart-shaped coil" defect problem. The occurrence of the "heart-shaped coil" defect will seriously affect the quality of the strip, resulting in the degradation of the quality of the finished strip, or even being sentence...

AI Technical Summary

Problems solved by technology

For the prevention and treatment of "heart-shaped coil" defects, the use of measures such as coiling tension optimization can certainly reduce the incidence of defects, but due to the constraints of "loose coil" and other defect prevention and control, the range of coiling tension optimization cannot be too large. This method cannot achieve the goal of eradicating the defect of "heart-shaped roll"

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