A laser flatness monitoring method and system for a hot rolling skin pass unit

Abstract

The invention relates to the field of plate shape monitoring of hot rolling strip steel finishing products, in particular to a hot rolling flattening unit laser plate shape monitoring method and system. The hot rolling flattening unit laser plate shape monitoring method comprises the following steps of 1, arranging a first laser transmitter over a hot rolling steel roll flattening production linequality inspection area, and arranging a second laser transmitter above the hot rolling steel roll flattening production line quality inspection area; 2, adjusting the orientation of the first laser transmitter and the second laser transmitter with strip steel as the reference, so that the first laser transmitter perpendicularly transmits a laser standard line, the second laser transmitter transmits a laser indication line at the inclination angle of 10-20 degrees, and in addition, the laser indication line is within the laser standard line range; and 3, judging the wave shape height of the strip steel by monitoring the distortion degree of the laser indication line. By means of the hot rolling flattening unit laser plate shape monitoring method, the defect display degree of the strip steel is raised, and the problem that a great number of products which are unqualified in plate shape quality flow to the market and users is avoided.

Description

technical field [0001] The invention relates to the field of flatness monitoring of hot-rolled strip finishing products, in particular to a laser flatness monitoring method and system for a hot-rolled leveling unit. Background technique [0002] As the market situation in the iron and steel industry continues to become increasingly severe, users have further increased requirements for the shape quality of thin-gauge hot-rolled coils. The way that the operators of the hot-rolling tempering unit rely on the naked eye to observe the shape of the plate for quality inspection is far from meeting the requirements. Since the shape defects with a wave shape height of less than 30mm cannot be effectively identified, the number of objections to the quality of the thin-gauge shape in the market has increased significantly. Contents of the invention [0003] In order to quickly solve the problem of plate shape quality inspection, this invention utilizes the principle that the flat la...

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Problems solved by technology

[0003] In order to quickly solve the problem of plate shape quality inspection, this invention utilizes the principle that the flat laser line will be distorted and deformed when it is irradiated with a certain inclination angle on the uneven surface, and a laser plate shape monitoring method for the hot rolling mill is invented. and its system

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