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Engineering, Energy, Transport AIC

space SCIENTIFIC JOURNALS OF VINNITSA NATIONAL AGRARIAN UNIVERSITY

Issue №: 1(108)

Published: 2020.08.27
DOI: 10.37128/2520-6168-2020-1


Description:
В журналі вирішуються проблеми створення та удосконалення техніки та технологій для сільського господарства, харчових та переробних виробництв, машинобудування, енергетики та транспорту.

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RESEARCH DEVELOPMENT OF CONTACT DEFORMATION STRESSES WHILE ROLLING

DOI: 10.37128/2520-6168-2020-1-12
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Muzychuk Vasyl – PhD, Associate Professor of the Department of “Technological Processes and Equipment of Processing and Food Productions” of the Vinnytsia National Agrarian University (3 Solnechnaya St, Vinnytsia, 21008, Ukraine, e-mail: wasil@vsau.vin.ua).

Tokarchuk Oleksii – PhD, Associate Professor of the Department of “Technological Processes and Equipment of Processing and Food Productions” of the Vinnytsia National Agrarian University (3, Solnyshchaya St., Vinnytsia, 21008, Ukraine, e-mail: tokarchuk@vsau.vin.ua ).

 

Annotation

The method of determination of contact normal and tangential stresses during rolling is considered, taking into account the development of deformation over time.

There are many methods for determining the contact normal and tangential stresses, but they all consider the distribution along the strain boundary. This approach to solving problems does not allow to take into account the uneven deformation in the transverse direction and the influence of lateral non-contact zones adjacent to the actual deformation center. These factors should be taken into account when determining the tangent and normal stresses when rolling in calibers with different ratios of geometric shapes and rolling billet. Also, existing methods of determining contact normal and tangential stresses do not take into account the development of deformation over time.

Deriving the equations that determine the deformation force of the friction force and pressure, it was assumed that the normal to the plane would not coincide with any of the axes of the coordinate system, and the inclined platform was considered as an inclined section in the parallelepiped voltage across the edges of the volume, which is distributed uniformly.

The obtained formulas for determining the normal and tangent contact stresses in the deformation zone take into account rolling in calibers with different ratio of geometric shapes and rolling billet, characterize the dynamics of change of the deformation cell in time.

The paper deals with rolling of AK6 alloy workpieces having Ø25x150 mm dimensions in oval caliber, with a height of 13 mm and a width of 29 mm and calculated normal and contact stresses. The plots of normal and tangent stresses show a change in the value of stress with increasing contact area and deformation time.

The results of studies of normal and tangent stresses show a change in their values with increasing contact area and deformation time.

When checking the proposed method, the discrepancy between the results of the theoretical calculation and the experimental data is not more than 4%, which confirms the possibility of using the method to determine the contact normal and tangential stresses during rolling.

 

Keywords: rolling, contact normal and tangential stresses, deformation.

List of references

[1] Gunko, I. V., Muzychuk, V. I., Nakhaichuk, O. V. (2015). Talking tne development of deformation into determining normal and tangential contact stresses at the forge. Vseukrayinskij naukovo-tekhnichnij zhurnal «Tekhnika, energetika, transport APK». Vinniczya, 2(85), 102–107. [in English].

[2] Muzychuk, V. I., Nakhaichuk, O. V., Sivak, R. I. (2012). Plastichnist alyuminiyevikh splaviv pri izotermichnomu valczyuvanni zagotovok [Plasticity of aluminum alloys during isothermal rolling of billets]. Vibracziyi v tekhniczi i tekhnologiyakh, 2(66), 82–86. [in Ukrainian].

[3] Ogorodnikov, V. A., Muzychuk, V. I., Nakhaychuk, O. V. (2007). Mekhanika protsessov kholodnogo formoizmeneniya s odnotipnymi skhemami mekhanizma deformatsii [Mechanics of cold forming processes with the same type of deformation mechanism]. Monografiya. V.: Universum. Vinnitsa. [in Ukrainian].

[4] Grudyev, A. P. (1988). Teoriya prokatki [Rolling theory]. M.: Metalurgiya. [in Russian].

[5] Matvijchuk, V. A., Mikhalevich, V. M. (2016). Rozvitok proczesiv lokalnogo deformuvannya [Development of local deformation processes]. Monografiya: Teoriya i praktika obrobki materialiv tiskom. AT «Motor Sich». [in Ukrainian].

[6] Sivak, R. I., Koczyubivska, K. I., Sukhorukov, S. I. (2016). Vpliv protitisku, shho stvoryuyetsya tverdim seredovishhem, na deformivnyast zagotovok pri radialnomu vidavlyuvanni [The influence of the pressure created by the solid medium on the deformability of the workpieces during radial extrusion]. Visnik mashinobuduvannya ta transportu, 2(4), 101–108. [in Ukrainian].

[7] Lyubin, M. V., Tokarchuk, O. A. (2019). Vpliv sposobu kriplennya bezstruzhkovikh mitchikiv na proczes vitiskuvannya rizbi [The influence of the method of fastening the stringless taps on the process of squeezing the thread]. Vibracziyi v tekhniczi ta tekhnologiyakh. Vi`nniczya VNAU, 2(93), 56–61. [in Ukrainian].

[8] Veselovska, N. R., Turich, V. V., Rutkevich, V. S. (2017). Kontaktna vzayemodi`ya i`nstrumenta z detallyu u proczesakh poverkhnevogo plastichnogo deformuvannya z ultrazvukom [Contact of the tool with the part in the processes of surface plastic deformation with ultrasound]. Vibracziyi v tekhniczi ta tekhnologiyakh. 2(85). 51–58. [in Ukrainian].

 

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About journal

Topics of the journal:

131 - Applied Mechanics

132 - Materials Science

133 - Industry engineering

141 - Power engineering, electrical engineering and electromechanics

208 - Agricultural engineering

The magazine "Engineering, Energy, Transport AIC" is included in the list of scientific professional editions of Ukraine on technical sciences

(Category "Б", Order of the Ministry of Education and Science of Ukraine dated 02.07.2020 №886)

 

Key information:
ISSN (print): 2520-6168
DOI: 10.37128/2520-6168

Certificate of state registration of mass media: No. 21906-11806 P dated 03/12/2016.

Founder of the journal: Vinnytsia National Agrarian University

Editor-in-chief: Tokarchuk Olexiy A.

Ph.D., Assoc., VNAU (Vinnytsia)

Deputy Editor-in-Chief: Veselovska Nataliia R.

Doctor of Technical Sciences, Full Prof., VNAU (Vinnytsia)

Executive Secretary: Polevoda Yuri A.

Ph.D., Assoc., VNAU (Vinnytsia)

Members of the Editorial Board:

Tokarchuk O.A. - Ph.D., Associate Professor, Vinnytsia National Agrarian University

Veselovska N.R. - Doctor of Technical Sciences, Full Professor, Vinnytsia National Agrarian University

Bulgakov V.M. - Doctor of Technical Sciences, Full Professor, Acad. NAAS, National University of Life and Environmental Sciences of Ukraine

Iskovich-Lototsky R.D. - Doctor of Technical Sciences, Full Professor, Vinnytsia National Technical University

Bandura V. N. - Ph.D., Full professor, Vinnytsia National Agrarian University

Polevoda Yu.A. - Ph.D., Associate Professor, Vinnytsia National Agrarian University

Tsurkan A.V. - Ph.D., Associate Professor, Vinnytsia National Agrarian University

Ivanchuk Y.V. - Ph.D., Associate Professor, Vinnytsia National Technical University

Jordan Todorov Maximov - Doctor of Technical Sciences, Full Professor, Technical University of Gabrovo (Bulgaria)

Type of publication: journal

Kind of publication: scientific

Publication status: domestic

Year of foundation: 1997

Periodicity: 4 times per year

Volume: 18-20 conv. print. sheet (А4)

ISSN: 2520-6168 (print version), (online version)

Language of publication: (mixed languages) Ukrainian, Russian, English

The sphere of distribution and category of readers: national, foreign, faculty, scientists, entrepreneurs.

The periodical edition is included to the List of scientific professional publications of Ukraine on technical sciences, approved by order of the Ministry of Education and Science of Ukraine in 05.16.2016, No. 515.

The journal "Engineering, Energy, Transport AIC" is included in the "Catalog of Ukrainian Publications".

Subscription to the journal can be issued in each post office. The subscription index is 99720.

History of journal:

It was founded in 1997 under the title "Bulletin of the Vinnitsa State Agricultural Institute." According to the Decree of the Presidium of the Higher Attestation Commission of Ukraine of September 11, 1997, this publication received the status of a professional in which it is allowed to publish the main results of dissertation researches.

In 2001-2014 the journal published under the title “Collection of scientific works of Vinnytsia National Agrarian University. Series: Technical Sciences "(Certificate of State Registration of Mass Media KV No. 16644-5116 PR of 04/30/2010).

Since 2015 journal has title "Engineering, Energy, Transport AIC" (Certificate of State Registration of Mass Media No. 21906-11806 P dated 03/12/2016).