Hot rolled steel strip cross section profile local high point grading discrimination method

Abstract

The invention relates to a hot rolled steel strip cross section profile local high point grading discrimination method, which comprises the steps of obtaining finishing mill outlet steel strip cross section profile uniform distribution measurement points, and carrying out grading discrimination on the obtained cross section profile measurement data of the coordinate position of each steel strip inthe length direction. On the basis of multifunctional instrument data, automatic grading discrimination of local high points of the cross section profile of the hot rolled steel strip is realized, the problems of non-uniform manual detection standards and low accuracy of the local high points are solved, and batch defects are avoided. Automatic prompting of local high-point defects of the cross section profile of the hot rolled steel strip is achieved, and an operator can take adjustment measures in time according to traffic light alarm information to eliminate or improve the local high-pointdefects. The invention also provides a report function for recording the grading discrimination result of the full-length local high point of the hot rolled steel strip, thereby providing a basis forthe quality discrimination of the steel strip, guiding the production of a downstream cold rolling process, taking measures in advance, and avoiding the generation of quality defects.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled steel strip production, and in particular relates to a method for grading and discriminating local high points of the cross-sectional profile of a hot-rolled steel strip. Background technique [0002] The production process of hot-rolled steel strip is as follows: the steel billet is heated to the specified temperature by the heating furnace, rolled by the rough rolling unit, and then rolled by the finishing rolling unit, and finally becomes the finished steel strip. [0003] The local high point is a typical defect of the hot-rolled steel strip. The local high point refers to the thickness of the steel strip at a certain point in the cross-section of the hot-rolled steel strip is thicker than that of the adjacent area. Local high-point defects will be inherited to subsequent cold rolling production, resulting in defects such as product marks and poor flatness. High-quality cold-rolled sheets ...

AI Technical Summary

Problems solved by technology

[0004] The cross-sectional profile of the hot-rolled steel strip is generally measured by a multi-function instrument, but the instrument only provides measurement data, and the identification of local high points only depends on the operator's visual inspection based on the curve recorded by the multi-function instrument displayed instantaneously. Uniformity, strong dependence on experience, easy to cause local high-point defects in batches

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