Bar rolling Haff surface oxidation black belt width measuring method based on image processing

Abstract

The invention discloses an image processing-based method for measuring the width of a Hough surface oxidation black belt in bar rolling, which is characterized in that on the basis of image processing, a traversal search method is adopted, and boundary coordinates of a bar and boundary coordinates of an oxide scale black belt in a picture are read by setting a specific gray threshold, so that the width of the Hough surface oxidation black belt in bar rolling is measured. And the width of the oxide scale black belt is obtained through the proportion of the coordinates and the real object radius of the bar, and then measurement of the width of the oxide scale black belt in bar rolling is achieved. By means of the mode, data quantification of the oxide scale black bands can be achieved, and data support can be provided for technological parameter formulation, rule searching, related big data processing, machine learning and the like for large-scale classes.

Description

technical field [0001] The invention belongs to the technical field of bar rolling, and in particular relates to an image processing-based method for measuring the width of an oxidized black strip on a half surface of bar rolling. Background technique [0002] The final rolling pass of bar rolling is circular, and the actual schematic diagram of the final stand of bar rolling is as follows figure 1 shown. When the longitudinal extension (that is, the width) of the bar in the pass is too large, such as figure 1 As shown in (b), the material will flow into the roll gap, and an ear defect will appear (the flow of material into the roll gap will cause a bulge in the round product, called an ear defect). If the longitudinal extension (i.e. spread) is too small, there will be insufficient diameter (such as figure 1 (c) shown). That is, during the rolling process, the width of the part of the bar that is in contact with the air (such as figure 1 As shown in B in (a), the field...

AI Technical Summary

Problems solved by technology

At present, at the production site, the width of the oxide scale black belt has always been observed by the masters with their eyes, and the size can be known qualitatively, but cannot be quantified. This method obviously hinders in-depth research on the relationship between relevant process parameters.

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