Journals →  CIS Iron and Steel Review →  2022 →  #1 →  Back

Tubemaking
ArticleName Analytical calculation of sheet curvature in four-roll mills at tubes production
DOI 10.17580/cisisr.2022.01.10
ArticleAuthor V. N. Shinkin
ArticleAuthorData

National University of Science and Technology “MISiS” (Moscow, Russia):

V. N. Shinkin, Dr. Phys.-Math., Professor, e-mail: shinkin-korolev@yandex.ru

Abstract

Stationary bending of sheet metal on the electromechanical rolling mills demonstrates high productivity and efficiency, relevant for any modern enterprise. Regardless of the number of shafts, the operating principle of the mills is not complicated. The sheet blank is installed in the gap between the shafts, which rotate in different directions. Passing between the cylinders, the sheet bends and takes the desired shape. The main assortment of finished products, produced with the help of rollers, are details in the form of a cylinder, cone or oval. The cold bending method, which is the basis of the working process, does not destroy the metal and does not have a negative influence on its structure, as it sometimes happens during prolonged thermal exposure on metal alloys. The popularity of roller mills is largely due to their relatively low cost, as well as minimal outlay on maintenance and exploitation. If the company needs a cheaper and more economical mills, it is worth paying attention to manual models. For larger companies, the four-roller mills equipped with CNC-systems and operating in automatic regime are recommended. Modern models, produced by leading manufacturers, are favorably distinguished by visibility and ease of exploitation, attractive design, guaranteed safety and reliability. Such equipment is in demand in mass production, where high productivity and trouble-free operation of mills are appreciated. It is impossible to guess the sheet blank curvature in rolling new type of tube. This paper is devoted to the solution of this important problem and to analytical calculation of blank curvature in the four-roller mills.

keywords Curvature, four-roll mills, bend, tube, analytical calculation, mathematical modelling
References

1. Shinkin V. N. Calculation of parameters of the asymmetrical three-roller sheet-bending rolls in steel pipes production. Izvestiya Ferrous Metallurgy. 2017. Vol. 60. No. 4. pp. 285−291.
2. Shinkin V. N. Influence of non-linearity of hardening curve on elasticoplastic bend of rectangular rod. CIS Iron and Steel Review. 2019. Vol. 17. pp. 39–42.
3. Belskiy S. M., Shopin I. I. Mathematical model of the probability of strip breakage during cold rolling. Chernye Metally. 2020. No. 3. pp. 18−23.

4. Song D.-L., Zhang Y.-C., Du J.-F., Yi X.-C., Sun Y.-B., Cui Y.-H. Deformation analysis and parameters optimization for tensionbending leveling of strip. Journal of Plasticity Engineering. 2021. Vol. 28. No. 10. pp. 84−90.
5. Fadeev V., Kondrushin A. Special aspects of determining parameters for continuous deformation of pipe billets for the specified pipes size range. Materials Today: Proceedings. 2021. Vol. 38. pp. 1322−1325.
6. Fedorov V. A., Ushakov I. V., Permyakova I. E. Mechanical properties and crystallization of an annealed cobalt-based amorphous alloy. Russian Metallurgy (Metally). 2004. Vol. 2004. No. 3. pp. 293−297.
7. Wang W.-B. Stability analysis of cross-section of double-row large-diameter pipeline based on BIM technology. International Journal of Industrial and Systems Engineering. 2021. Vol. 39. No. 2. pp. 162−175.
8. Belskiy S. M., Shopin I. I., Safronov A. A. Improving efficiency of rolling production by predicting negative technological events. Defect and Diffusion Forum. 2021. Vol. 410. pp. 96−101.
9. Goncharuk A. V., Fadeev V. A., Kadach M. V. Seamless pipes manufacturing process improvement using mandreling. Solid State Phenomena. 2021. Vol. 316. pp. 402−407.
10. Li X. Theoretical analysis on structural mechanics for multi-roll straightener of plate. Forging and Stamping Technology. 2020. Vol. 45. No. 11. pp. 134−142.
11. Shinkin V. N. Simplified method for calculation of bending moments of steel sheet and reactions of working rollers in multiroll straightening machine. Izvestiya Ferrous Metallurgy. 2017. Vol. 60. No. 10. pp. 777−784.
12. Li S., Wei C., Long Y. Deformation Analysis of Engineering Reinforcement Straightening Based on Bauschinger Effect. International Journal of Steel Structures. 2020. Vol. 20. No. 1. pp. 1−12.

Full content Analytical calculation of sheet curvature in four-roll mills at tubes production
Back