DOI: 10.52150/2522-9117-2024-38-710-730

Bilodidenko Serhii Valentynovych, D. Sc. (Tech.), Professor, Department manager, Department of industrial mechanical engineering, Ukrainian State University of Science and Technologies, Lazariana St., 2, Dnipro, 49010, Ukraine. ORCID: 0000-0002-5768-594X. E-mail: s.v.bilodidenko@ust.edu.ua

Mazur Ihor Anatoliiovych, Ph. D. (Tech.), Associate Professor, Associate Professor, Ukrainian State University of Science and Technologies, Lazariana St., 2, Dnipro, 49010, Ukraine. ORCID: 0000-0003-2177-7110. E-mail: i.a.mazur@ust.edu.ua

Dobriak Volodymyr Dmytrovych, Ph. D. (Tech.), Senior Engineer, SE “Ukrainian institute for designing iron and steel works”, Sicheslavska Naberezhna St., 17, Dnipro, 49000, Ukraine

Uhriumov Dmytro Yuriiovych, Technical Director, LLC “Marine Survey Company”, Kalynova St., 87, office 402, Dnipro, 49087, Ukraine.

Uhriumov Yurii Dmytrovych, Ph. D. (Tech.), Senior Engineer, SE “Ukrainian institute for designing iron and steel works”, Sicheslavska Naberezhna St., 17, Dnipro, 49000, Ukraine. E-mail: ugriumov1946@gmail.com

MODELING THE OPERATION OF THE HYDRAULIC BRAKE OF THE FORHOLLER FEEDING APPARATUS OF THE PILGER ROLLING MILL

Abstract. The feeder is one of the main parts of the equipment of the pilgrim mill, the work of which determines not only the productivity, but also the quality of the pipes that are rolled. One of the main problems of working feeders is insufficient braking of the moving masses when setting the sleeve on the mandrel in the rolls of the pilgrim loom, which leads to a significant speed of meeting the sleeve with the rolls, which reaches 1–2 m/s. This significantly increases dynamic loads in the main line of the mill and limits its performance. A common disadvantage of known braking devices is the pulsed increase in fluid pressure in the hydraulic brake. The purpose of the work is to minimize the braking force of the moving parts of the fore-holler within the limits of permissible accelerations, distance and time. In operation, the minimization of the braking force is achieved due to the constancy of the fluid pressure in the braking chamber of the hydraulic brake throughout the entire braking path. Two versions of the hydraulic brake are considered, in which the kinetic energy of the moving parts during braking is absorbed by the work of friction of the brake fluid when it flows from the braking chamber into the water chamber. In the first variant, the flow of fluid from the brake chamber to the water chamber is carried out through throttling channels in the body of the spindle. In the second variant, the fluid flows through a variable annular gap, which is formed by the cylindrical surface of the braking sleeve and the curved surface of the spindle in the braking area. The profile of the throttling channels and the curved surface of the spindle is approximated by straight lines, which greatly simplifies their manufacture. Profiles of channels and curvilinear formers for all pipes that are rolled are close enough to each other, which allows the entire assortment to be divided into two groups and for each group to assign one profile of channels or curvilinear formers. With the help of hydrodynamic theory, two versions of the hydraulic brake were simulated and their advantages and disadvantages were determined. The braking device according to the first variant has the advantage that the spindle and the braking sleeve are centered on the contact surface, but has the disadvantage that it is more labor-intensive to manufacture than a spindle with conical surfaces in the braking area.To check and clarify the results obtained in the work, it is necessary to carry out physical simulation of the operation of the hydraulic brake according to two options.

Key words: pipe, pilgrim mill, feeding device, forholler, hydraulic brake, pneumatic brake, braking chamber, plunger, water chamber, throttle valve, fluid pressure, braking time, braking path.

DOI: https://doi.org/10.52150/2522-9117-2024-38-710-730

For citation: Bilodidenko, S. V., Mazur, I. A., Dobriak, V. D., Uhriumov, D. Yu., & Uhriumov, Yu. D. (2024). Modeling the operation of the hydraulic brake of the forholler feeding apparatus of the pilger rolling mill. Fundamental and applied problems of ferrous metallurgy, 38, 710-730. https://doi.org/10.52150/2522-9117-2024-38-710-730

References

Emelyanenko, P. T. (1937). Pilgerstani. ONTI NKTI
Kozhevnikov, S. N., Prazdnikov, A. V., & Ioffe, A. M. (1963). Podayushchie apparati piligrimovikh stanov i vozmozhnie puti ikh avtomatizatsii. Institut “Chermetinformatsiya”, 7(4)
Kozhevnikov, S. N., Prazdnikov, A. V., Ioffe, A. M., Bibik, G. A. & Peshat, V. F. (1974). Oborudovanie tsekhov s piligrimovymi truboprokatnymi ustanovkami. Metallurgiia
Kozhevnikov, S. N., Prazdnikov, A. V. & Ioffe A. M. (1964). Novie napravleniya v sozdanii bistrokhodnikh padayushchikh apparatov piligrimovikh stanov. Metallurg (9)
Dobriak, V. D., Pavlovskii, B. G., Merezhko, V. L. & Shifrin, E. I. (2004). Uluchshenie parametrov tormozheniya podvizhnikh mass pri prokatke na pilgerstane. Metallurgicheskaia i gornorudnaia promyshlennost, (1), 37–40. https://www.metaljournal.com.ua/mgp-01-2004/
Dobryak, V. D., Balakin, V. F., Stepanenko, A. N. & Ugryumov, Yu. D. (2014). Koncepciya podayushego apparata s buferom dlya sovershenstvovaniya rezhima tormozheniya pri prokatke trub na piligrimovom stane. Byulleten “Chernaya metallurgiya”, (11), 51–57
Dobryak, V. D., Balakin, V. F. & Ugryumov, Yu. D. (2009). Puti modernizacii tormoznogo ustrojstva padayushego apparata pilgerstana. Teoriya i praktika metallurgii, (5–6), 57–63
Vakina, V. V., Denisenko, N. D. & Stolyarov, A. L. (1987). Mashinostroitelnaya gidravlika. Primery raschetov : uchebnoe posobie. Kiev
Altshul, A. D., Kalicun, V. I. & Majranovskij, F. G. (1977). Primery raschetov po gidravlike : uchebnoe posobie. Strojizdat
Dobryak, V. D., Balakin, V. F. & Ugryumov, Yu. D. (2010). Modelirovanie ustrojstva tormozheniya podvizhnyh chastej forgollera podayushego apparata piligrimovogo stana. Teoriya i praktika metallurgii, (3–4), 58–62