Determining the deformed state in the process of rolling conical shells with a flange

Authors

DOI:

https://doi.org/10.15587/1729-4061.2020.216523

Keywords:

forging, rolling, taper, conical shell, ring, hollow forging, step striker

Abstract

Obtaining conical shells by forging is an important and relevant task in energy and heavy engineering. Existing processes of their manufacture come down to simplifying the configuration of such billets. The result is the increased material’s consumption while the internal fiber is cut during machining, which also leads to a decrease in mechanical properties. A new forging technique necessitated a study into the shape change of the billet and the distribution of deformations in the process of rolling. A finite-element method was used to investigate the process of rolling out the step hollow billets. Based on the study results, the forging’s taper was established, obtained during the forging process. A research procedure involving the finite-element method was devised to study the operation of conical shells’ rolling, which made it possible to determine a change in the shape and size of a hollow forging when rolled out by a step tool. A parameter has been proposed to quantify the formation of taper in the process of rolling a billet with a flange. Based on the study results, a step-wise distribution of the intensity of logarithmic deformities in the body of a forging was established when conical shells were rolled out. It was found that the step deformation leads to an increase in the uneven distribution of deformations on the part of the protrusion and ledge. Maximum deformations of 1.0...1.2 occur at the inner and outer surfaces of the step billet’s protrusion. Dependences of the shape change in a step billet for the investigated ratios of sizes and rolling modes have been established. It was found that the maximum taper is obtained at a deformation degree of 15 %. It was determined that the degree of compression in the ledge and protrusion is leveled after 3 deformation runs of the step billet

Author Biographies

Oleg Markov, Donbass State Engineering Academy Akademichna str., 72, Kramatorsk, Ukraine, 84313

Doctor of Technical Sciences, Professor, Head of Department

Department of Computerized Design and Modeling Processes and Machines

Volodymyr Panov, PJSC Energomashspetsstal Oleksy Tykhoho str., 1, Kramatorsk, Ukraine, 84306

Head of Forging Shop

Sergii Karnaukh, Donbass State Engineering Academy Akademichna str., 72, Kramatorsk, Ukraine, 84313

PhD, Associate Professor, Head of Department

Department of Basics of Designing a Machine

Anton Khvashchynskyi, PJSC Energomashspetsstal Oleksy Tykhoho str., 1, Kramatorsk, Ukraine, 84306

Deputy Head of Forging Shop

Roman Zhytnikov, Donbass State Engineering Academy Akademichna str., 72, Kramatorsk, Ukraine, 84313

Postgraduate Student

Department of Computerized Design and Modeling Processes and Machines

Volodymyr Kukhar, Pryazovskyi State Technical University Universytetska str., 7, Mariupol, Ukraine, 87555

Doctor of Technical Sciences, Professor, Head of Department

Department of Metal Forming

Maksym Kosilov, Donetsk Regional State Administration Akademichna str., 75/55, Kramatorsk, Ukraine, 84313

Head Specialist

Department of Economics

Pavlo Rizak, PJSC "Novokramatorsky Mashinostroitelny Zavod" Oleksy Tykhoho str., 1, Kramatorsk, Ukraine, 84305

Head Master

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Published

2020-12-31

How to Cite

Markov, O., Panov, V., Karnaukh, S., Khvashchynskyi, A., Zhytnikov, R., Kukhar, V., Kosilov, M., & Rizak, P. (2020). Determining the deformed state in the process of rolling conical shells with a flange. Eastern-European Journal of Enterprise Technologies, 6(1 (108), 34–41. https://doi.org/10.15587/1729-4061.2020.216523

Issue

Vol. 6 No. 1 (108) (2020): Engineering technological systems

Section

Engineering technological systems

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Copyright (c) 2020 Oleg Markov, Volodymyr Panov, Sergii Karnaukh, Anton Khvashchynskyi, Roman Zhytnikov, Volodymyr Kukhar, Maksym Kosilov, Pavlo Rizak

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