Online detection method for deviation of hot-rolled strip steel

Abstract

The invention provides an online detection method for deviation of hot-rolled strip steel, and belongs to the technical field of plate and strip rolling automation. According to the method, a machine vision technology is adopted, a binocular linear array camera is used for collecting strip steel images in real time, the real-time width and deviation amount of the strip steel are calculated through means such as edge detection, the influence of loop angle swing on a detection result is effectively eliminated, and finally camera error compensation is added to guarantee the detection precision. According to the strip steel deviation amount detected through the method, the deviation detection precision of the strip steel can be improved to the millimeter level, and a reliable basis is provided for follow-up strip steel deviation control.

Description

technical field [0001] The invention relates to the technical field of plate and strip rolling automation, in particular to an online detection method for hot-rolled strip deviation. Background technique [0002] As an indispensable raw material, plate and strip products are used in various fields such as industry, agriculture, commerce, and manufacturing, such as automobile manufacturing, agricultural machinery, electronic products, food packaging, and equipment. Provides great convenience. [0003] At present, my country's steel production ranks first, but there is a big problem of excess capacity of ordinary steel, high-grade alloy steel, fatigue-resistant high-strength steel, high-temperature-resistant, radiation-resistant steel and special steel with high added value and high technology content China's high-end steel products are heavily dependent on imports. The reason is that the plate shape problem has become one of the main problems that plague the production effic...

AI Technical Summary

Problems solved by technology

The running deviation between strip steel racks is the defect of dimensional accuracy and internal stress deviation caused by the uneven three-dimensional deformation of the metal along the width direction of the rolled piece, which will not only cause quality problems of the finished product, but also affect the continuity and stability of the entire rolling process

[0005] The deviation of the strip will cause the fluctuation of the wedge index of the strip. During the thin-gauge rolling process, it is very easy to produce waves between the stands, which will affect the quality of the strip. Scratches on the steel surface, defects such as edge damage, resulting in a reduction in yield and product degradation, and damage to equipment such as rolls and guides. At present, there is no effective monitoring method for the deviation of the strip between racks. The center line offset data can be obtained at the finish rolling exit width gauge. It is based on the current production status and demand that it is particularly important to design and develop a deviation detection system between stands of the finishing rolling mill.

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