A Method for On-line Shape Quality Judgment of Hot-rolled Strip Steel

Abstract

The invention relates to a method for judging the online shape quality of hot-rolled strip steel, and belongs to the technical field of metallurgical plate production methods. The technical scheme of the present invention is: obtain the 3 key process control parameter curves of the hot-rolled strip from the full length of the strip, remove the head and tail lengths of the strip to obtain the 5 key process control parameter curves of the hot-rolled strip, Based on the preset judgment rules in the hot-rolled strip online flatness quality judgment system, the eight key flatness process control parameter curves are judged one by one, and the judgment results are issued. The beneficial effect of the present invention is that: the preset judging rule is a rule verified according to previous historical data and user usage conditions, and the accuracy of hot-rolled strip shape judging is improved by optimizing the strip shape judging rule.

Description

technical field [0001] The invention relates to an online shape quality determination method for hot-rolled strip steel, and belongs to the technical field of metallurgical sheet production methods. Background technique [0002] At present, the domestic quality judgment of plate shape is still in the more common shape parameters, including flatness, convexity and wedge shape, all of which are determined by the average value of the process parameter curve. Because the judgment is not comprehensive enough, it cannot meet the needs of users. Strict quality requirements. [0003] Disadvantages of the conventional method for determining shape parameters: [0004] 1) The quality judgment is still based on the more common shape parameters, including flatness, crown, wedge data, and the final rolling temperature hit parameter is not included, and the data is not considered comprehensively; [0005] 2) The detection data is the data of the finishing rolling exit, and there is no da...

AI Technical Summary

Problems solved by technology

[0004] 1) The quality judgment is still limited to the more common shape parameters, including flatness, convexity, and wedge data, without including the final rolling temperature hit parameters, and the data consideration is not comprehensive;

[0005] 2) The test data is the exit data of finish rolling, and there is no data on the shape change after the cold zone of the covering layer;

[0006] 3) The determination rule of the plate shape parameters is based on the average value, without considering the local change of the plate shape, which is prone to missing defects

[0007] Based on the above reasons, the hot-rolled strip shape judgment method is currently used. By collecting the hot-rolled key process parameter curves and judging the strip shape according to the system’s judgment rules, because the parameters involved in the judgment are incomplete, and adopt The judgment of the average value often leads to misjudgment of the strip shape, and the strip shape or partial shape does not meet the user's requirements.

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