Three-dimensional description method of shape mode, deviation size and position of plate and strip

Abstract

The invention discloses a three-dimensional description method of the plate shape mode, deviation size and position of a plate and strip, which includes: using the coefficients of the first-order and third-order basis modes of the Legendre orthogonal polynomial to draw the mode diagram of the asymmetric item, two The coefficients of the sub- and quaternary basis modes are used to draw the mode diagram of the symmetry item; the residual stress value of the flatness measured by the flatness meter is converted into the flatness IU value; Shape defect coefficient, separate the symmetrical item and the asymmetrical item, and obtain the quartic and quadratic coefficient ratio of the symmetrical item and the cubic and first order coefficient ratio of the asymmetrical item at the same time; obtain the plate shape deviation of the symmetrical item and the asymmetrical item respectively Describe the index; express the symmetric items and asymmetric items in the plane modal diagram respectively, and use the plane modal diagram to describe the three-dimensional information of the plate shape mode, deviation size and strip length direction position of the plate and strip. The invention can realize the intellectualization of plate shape defect identification.

Description

technical field [0001] The invention relates to the technical field of cold-rolled steel strips, in particular to a method for describing three-dimensional shapes, deviations, and positions of strips. Background technique [0002] With the improvement of technical level, the quality problems of plate and strip become more and more prominent, and become the focus of current research. The quality index of plate and strip mainly includes two parts: thickness and plate shape. At present, the transverse thickness control has basically met the requirements, so more attention is paid to the control of plate shape. Shape refers to the distribution of internal residual stress along the width direction of strip steel after rolling. Take a certain length of strip steel and place it on a plane naturally, and you can often observe the warpage of the strip steel. There are various forms of warping, most of which are wavy, and thin strips often produce wrinkles or local unevenness. Warpi...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a three-dimensional description method for the shape mode, deviation size and position of a plate and strip, to carry out shape pattern recognition on the shape defects that occur in the rolling process of cold tandem rolling, and record a whole roll The modal and shape deviation description indicators of the strip and the three-dimensional information of the position of each sampling point along the length direction of the strip solve empirical problems such as misjudgment and missed judgment in manual naked eye classification, and realize the identification of shape defects intelligent

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