DOI: 10.52150/2522-9117-2022-36-308-313

Verenov Valentyn Volodymyrovych, D. Sc. (Tech.), Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, Ukraine, 49107. ORCID: 0000-0002-2561-5365. E-mail: office.isi@nas.gov.ua

Podobedov Mykola Ivanovych, Ph. D. (Tech.), Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, Ukraine, 49107. E-mail: office.isi@nas.gov.ua

SIMULATION OF THE DYNAMICS OF THE PASSAGE OF A STRIP WITH A WELDING SEAM OF A CONTINUOUS GROUP OF ROLLING STANDS

Summary. The purpose of the work was to determine the dynamic response of the condition, i.e. tension and thickness, when a section of a strip with a seam is gradually rolled starting from the first to the last cage. The rolling dynamics of a strip with a welded joint (seam), which has a slight thickening relative to the strip, was studied. In contrast to the traditional approach, the equations were not solved in relative, but in absolute values of the variables. In addition, mathematical modeling was performed taking into account the mechanical vibrations of the rolling cages and the main drive line of the rolls and transport transfer with a delay of the thickness of the seam between the cages. This made it possible to examine in detail the high-frequency component of tension between stands fluctuations, the seam thickness, the speed of the overtaking strip, the cells, and the moment of elastic forces when the seam area enters the center of deformation between the rolls. The frequency of the cage’s own oscillations is reflected in the fluctuations of the seam thickness. At the exit from cage No. 1, the seam becomes of different thickness. The initial thickness of the seam decreases when moving to the last cages. At the same time, the action of the seam as a pathogen decreases. fluctuations of intercellular tensions are noticeably reduced. The peculiarity is that when the seam enters cage No. 2, there is always an amplitude weakening of the back tension, and then its peak increase by 1.1-1.5 times. In subsequent cages, the amplitude of the first tension peaks decreases. The tension shows the frequency of elastic oscillations of the drive lines and cage.

Key words: continuous rolling, strip, weld, oscillation, tension, thickness deviation.

DOI: https://doi.org/10.52150/2522-9117-2022-36-308-313

For citation: Verenov V. V., Podobedov M. I. Modeliuvannia dynamiky prokhodzhennia polosy zi zvarnym shvom bezperervnoi hrupy klitei [Simulation of the dynamics of the passage of a strip with a welding seam of a continuous group of rolling stands]. Fundamental and applied problems of ferrous metallurgy. 2022. Collection 36. P. 308-313. [In Ukrainian]. https://doi.org/10.52150/2522-9117-2022-36-308-313

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