Online testing method and measuring device of shape wave defects of hot rolled strip steel

Abstract

The invention relates to the field of online control of hot rolled strip steel coil separating line shape wave and particularly relates to an online testing method and a measuring device of shape wave defects of hot rolled strip steel. The online testing method and the measuring device of the shape wave defects of the hot rolled strip steel are characterized in that the measuring device of the shape wave defects is arranged above strip steel on an entrance side of a hot rolled coil separating line and is provided with an oscillating rod, wherein the oscillating rod moves along with the hot rolling strip steel and the end portion of the oscillating rod slides on the strip steel. The height of the shape wave of the position of the end portion of the oscillating rod is calculated through measuring deflection angles of the oscillating rod as the following steps: (1) setting the deflection angle of the oscillating rod to be 45 degrees when the strip steel is straight; (2) measuring the deflection angle with the value of theta when shape wave is formed on the strip steel; (3) approximately calculating the height h of the shape wave according to a formula h = R* cosine 45 degrees - R cosine theta. Compared with the prior art, the online testing method and the measuring device of shape wave defects of hot rolled strip steel have the advantages of being capable of providing real-time information of the shape wave defects of the coils to operators, ensuring that the operators can conduct flatting adjustment in advance and flatting efficiency and flatting quality are improved.

Description

technical field [0001] The invention relates to the field of on-line wave shape control of hot-rolled strip steel sub-coils, in particular to an on-line detection method and a measuring device for wave shape defects of hot-rolled strip steel. Background technique [0002] Hot-rolled strip steel wavy defect is a kind of flat defect produced in the hot rolling production process. At present, this defect can be tracked and monitored on-site through the exit shape meter of the finishing mill. However, when the steel plate passes through the subsequent laminar cooling process and the After the residual temperature self-tempering, irregular and uncertain changes will occur in the wave-shaped defects of the plate shape. In order to grasp the data of the shape defects, it is necessary to carry out manual measurement on the winding line. Only the wave-shaped defects can be predicted in advance. Only in this way can the leveling efficiency and leveling quality in the subsequent leveli...

AI Technical Summary

Problems solved by technology

[0002] Hot-rolled strip steel wavy defect is a kind of flat defect produced in the hot rolling production process. At present, this defect can be tracked and monitored on-site through the exit shape meter of the finishing mill. However, when the steel plate passes through the subsequent laminar cooling process and the After the residual temperature self-tempering, irregular and uncertain changes will occur in the wave-shaped defects of the plate shape. In order to grasp the data of the shape defects, it is necessary to carry out manual measurement on the winding line. Only the wave-shaped defects can be predicted in advance. In order to ensure the leveling efficiency and leveling quality in the subsequent leveling process

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