How to solve the problem of unpredictable and uncontrollable deviation of the rolling stock of the finishing rolling stand, and unstable operation caused production failure?
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Recently, the latest answer came from the 1580 and 2250 hot strip production lines of Magang Iron and Steel: Beijing University of Science and Technology Engineering Technology Research Institute (hereinafter referred to as "Beike Industrial Research") and Magang Iron and Steel Co., Ltd. (hereinafter referred to as "Magang Iron and Steel") Fourth Steel The rolling mill has completed the on-site assessment of the "strip deviation detection system between hot strip mills". This is the first domestic independent innovation and research and development of the inter-stand deviation detection system based on machine vision technology, which can accurately obtain strips in real time. Steel deviation and width change information, realize dynamic visual monitoring of deviation, provide pre-leveling setting parameters of finishing roll gap, and storage memory and automatic query of deviation data.
The project signed a contract in 2018 to install one set of inspection systems (a total of six sets) at the exit of the F1-F3 stands of the finishing mills of the 1580 and 2250 hot strip rolling lines of Magang Iron and Steel Co., Ltd. In close cooperation with the hot rolling technology group, biotechnology room, and equipment inspection group of Magang Iron and Steel Co., Ltd., it has realized that the strip deviation detection system between racks has been operating stably for more than one year, and the operation rate has reached more than 99%. The measurement accuracy and position measurement accuracy are both within +2mm. Relying on the measurement information to realize the predictive control of the roll gap leveling value, the monthly average number of rolls caused by deviation in the finishing rolling process has been reduced by more than 30% compared with 2017. (Picture 1 Picture 2)
On August 6, 2020, Magang
Iron & Steel’s Operation Improvement Department organized relevant experts
to inspect the project. The experts agreed that: For the F1-F3 racks of the
1580 and 2250 production lines, the hardware design, processing and processing
related to deviation detection have been completed. Installation, software
system development, debugging and online work can obtain real-time information
about the deviation position of the upstream frame strip steel, and its
detection accuracy, screen display, real-time performance and data storage meet
the project requirements; the developed upstream frame strip steel running The
biased pre-control model can provide the pre-swing leveling value for the
finishing rolling operators and meet the accuracy and stability test
requirements; after the system goes online, it effectively improves the
stability of the production process and meets project expectations.
After 10 years of
sharpening, the iron rod became a needle. At present, Beike Industrial Research
has developed a series of asymmetric online measurement and control
technologies for tilting buckles, sickle bends, and deviation between racks, so
that the production line is no longer helpless when facing such production
stability problems. The maturity of research and development and application of
this technology will strongly promote the realization of the iconic goal of the
intelligent production line of "unmanned driving" in hot strip
rolling, and promote the continuous improvement of the overall level of
intelligent manufacturing in my country.
rolling mill rolls, rolling mill
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