DOI: 10.52150/2522-9117-2026-40-029
V. H. Razdobrieiev1,*, Ph. D. (Tech.), Senior Researcher, ORCID 0000-0001-7402-7992
K. Yu. Kluychnikov1, Junior Researcher, ORCID 0000-0003-2465-3244
D. H. Palamar1, Junior Researcher, ORCID 0000-0002-9503-3248
O. I. Leshchenko1, Junior Researcher, ORCID 0000-0003-1877-8358
O. P. Ivanov1, Ph. D. (Tech.), Associate Professor, Leading Engineer, ORCID 0000-0003-1259-6377
1 Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine
* Corresponding author: v_razdobreev@ukr.net
MODELING THE PROCESS OF ALTERNATING DEFORMATION OF A STRIP-TYPE PROFILE IN A THREE-ROLLER BENDING-TENSILE DEVICE
Abstract. The use of high-precision profiles in modern mechanical engineering is of great importance in terms of improving the quality of manufactured products and significantly reducing the cost of their production. In Ukraine, the production of high-precision profiles is extremely limited, and the production of strip-type profiles is completely absent. In world practice, the production of strip-type profiles is possible in various ways: hot rolling, hot pressing, cold rolling, or drawing in monolithic or roller drawing mills. Roller dies for the production of shaped profiles have an advantage over monolithic dies, as a greater amount of crimping is possible in one pass. In addition, drawing in roller drawing machines takes place in non-driven rollers in combination with environmentally friendly heat treatment methods without the use of harmful cooling media in the form of lubricants, lead melts, salts and acids. At the same time, the peculiarities of the conditions of plastic equilibrium of the metal of the deformation center during the flattening of a round billet by drawing in roller draws inhibit the development of new profiles, including strip-type profiles with a ratio of their width to thickness of more than two. This is due to the fact that the uneven compression of the wire blank leads to an uneven distribution of stresses across the profile cross-section: in the middle part – compression, at the edges – tension and the presence of tensile force increases the areas of action of tensile stresses and their magnitude in the volume of the deformation center and, ultimately, under certain conditions, causes a significant decrease in plasticity and destruction of the edges of the finished profile. There are two ways to increase the plasticity of a metal – thermal and mechanical. The thermal method, which is widely used in industry, requires significant energy consumption. At the same time, previous studies, including those conducted at the ISI NASU, showed that it is possible to increase the plasticity of metal by means of alternating deformation of profiles, using, for example, equipment for straightening profiles or a scale breaker. At the same time, the results of specific studies of the influence of the parameters of the process of alternating metal deformation on the magnitude of stresses and the nature of their distribution over the cross-section of a strip-type profile are absent in the considered publications. The purpose of the research was to consistently analyze the stress state of the metal throughout the actual deformation center, taking into account the external zones, using a developed and tested mathematical model for calculating the stress-strain state of the metal. It has been established that the mechanism of residual stress occurrence is due to the magnitude of plastic deformation and the inhomogeneity of the distribution of deformations over the thickness of the profile during alternating deformation during its pulling through the DBT. According to the modeling results, it was determined that the maximum values of residual longitudinal stresses formed along the profile cross-section after leaving the DBT are 1.4 times less, regardless of the sign of the stresses, compared to the maximum longitudinal stresses formed under the pressure roller. It is shown that the maximum level of plastic deformations is observed at the beginning of alternating deformations in the DBT device with a decrease in their level at the exit from the DBT, which provides a decrease in the values of residual stresses and potential energy in the column made of St.08 steel.
Key words: alternating deformation, strip-type profiles, roller drawing, bending-tensile device (DBT), compressive stress, tensile stress.
For citation: Razdobrieiev, V. H., Kluychnikov, K. Yu.,Palamar, D. H., Leshchenko, O. I., & Ivanov, O. P. (2026). Modeling the process of alternating deformation of a strip-type profile in a three-roller bending-tensile device. Fundamental and applied problems of ferrous metallurgy, 40, 484-500. https://doi.org/10.52150/2522-9117-2026-40-029
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Рукопис надійшов до редакції / Received 11.10.2025
Рекомендовано до друку / Accepted 28.05.2026
Опубліковано / Published 30.05.2026
