logo

Engineering, Energy, Transport AIC

space SCIENTIFIC JOURNALS OF VINNITSA NATIONAL AGRARIAN UNIVERSITY

Issue №: 1(112)

Published: 2021.03.23
DOI: 10.37128/2520-6168-2021-1


Description:
The journal solves the problems of creation and improvement of machinery and technologies for agriculture: 131 - Applied Mechanics, 132 - Materials Science, 133 - Industrial Engineering, 141 - Power Engineering, Electrical Engineering and Electromechanics, 208 - Agricultural Engineering.

Read about journal

COLD PLASTIC DEFORMATION OF PROCESSES IN CONDITIONS OF BORDER FORMATION

DOI: 10.37128/2520-6168-2021-1-2
PDF Повернутись

Vasyl Muzychuk – 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, https://orcid.org/0000-0002-0848-2943 ).

Annotation

The article considers the process of forming the inner slot profile on a pipe billet by the method of cold plastic deformation, by compressing them with a matrix on a profile slotted mandrel (by the method of "covering" drawing). A comprehensive study of the mechanics of shaping products to assess their quality and study the possibility of improving the process itself.
In the case of three-dimensional molding, the surface of plasticity depends on the history of deformation, which is determined by the change in the stress state with increasing accumulated intensity of deformation. The surface of plasticity in this case is not fixed and can be constructed using the criterion of deformability, which provides the position of the point of the fracture surface, taking into account the history of deformation.  
The planes of deformation and boundary surfaces of plasticity are constructed, which showed a sufficient margin of plasticity for the process of forming the inner splined profile.
It is substantiated that when constructing the load trajectory in the space of dimensionless indicators   and   its type is unambiguously determined by the conditions of formation characteristic of the studied process and practically does not depend on the mechanical properties of the deformed metal.
The areas of deformation closest to the failure are determined by indicators that take into account the influence of the first and third invariants of the stress tensor (lateral region and area of depressions of the profile relative to the process of forming the internal splined profile), in which the used plasticity reaches values   = 0,34 ... 0,4.
From the point of view of providing a margin of safety, such calculations must be performed taking into account the indicator that takes into account the influence of the third invariant of the stress tensor.

Keywords: forming, workpiece, plastic deformation, splined mandrel, plasticity reserve, load trajectory, stress tensor invariants, plasticity resource.

List of references

[1]    Kolmogorov, V. L. (1970). Napryazheniye. Deformatsii. Razrusheniye [Voltage. Deformations. Destruction]. M: Metallurgy. [in Rassian].
[2]    Ogorodnikov, V. A., Sivak I. O. (1982). Issledovaniye protsessov slozhnogo deformirovaniya v malootkhodnoy tekhnologii ob"yomnoy shtampovki [Research of complex deformation processes in low-waste technology of forging]. Tr. Republic of NTK "Modern methods of low-waste and waste-free technology in mechanical engineering". Kishinev. 122–123. [in Belarus].
[3]    Ogorodnikov, V. A. (1983). Otsenka deformiruyemosti metallov pri obrabotke davleniyem [Assessment of the deformability of metals during pressure treatment]. K: Vyshcha shkola. [in Ukrainian].
[4]    Ogorodnikov, V. A. (1989).  Deformiruyemost' i razrusheniye metallov pri plasticheskom formoizmenenii. [Deformability and fracture of metals during plastic deformation]. К: UMK 130. [in Ukrainian].
[5]    Ohorodnikov, V. A., Muzychuk, V. I., Nakhaychuk, O. V. (2007). Mekhanika protsesiv kholodnoho formozminyuvannya z odnotypnymy skhemamy mekhanizmu deformatsiyi. Monohrafiya [Mechanics of cold forming processes with the same type of deformation mechanism schemes. Monograph]. V: UNIVERSUM-Vinnytsya [in Ukrainian].
[6]    Nakhaychuk, O. V., Rosenberg, O. O., Ogorodnikov, V. A., Kritsky, A. D., Melnichenko, V. V., Studenets, S. F. (2008). Novi tekhnolohichni protsesy z vykorystannyam prohresyvnykh metodiv plastychnoho deformuvannya. Monohrafiya [New technological processes using advanced methods of plastic deformation. Monograph]. V: UNIVERSUM-Vinnytsya [in Ukrainian].
[7]    Rosenberg, O. A, Trachenko, B. P. (1991). Formoobrazovaniya shlitsevikh otverstiy v trubnykh zagotovkakh metodom kholodnogo plasticheskogo deformirovaniya [Forming of spline holes in pipe blanks by cold plastic deformation]. Technology and organization of production, 2. 20–30  [in Ukrainian].
[8]    Ogorodnikov, V. A., Savchinsky, I. G., Nakhaichuk, O. V. (2004). Napryazhonno-deformirovannoye sostoyaniye pri formirovanii vnutrennego shlitsevogo profilya metodom obzhatiya na opravke [Stress-strain state during the formation of an internal spline profile by the method of compression on a mandrel]. Heavy engineering, 12. 31–33. [in Rassian].
[9]    Ohorodnikov, V. A., Nakhaychuk, O. V., Muzychuk, V. I. (2005). Prilozheniye teorii deformiruyemosti k resheniyu zadach mekhaniki formirovaniya vnutrennego shlitsevogo profilya obzhatiyem na opravke [Application of the theory of deformability to solving the problems of mechanics of forming an internal spline profile by compression on a mandrel]. Progressive technologies and equipment for forging and stamping production. Moscow: MSTU "MAMI". 66–75. [in Rassian].
[10]    Syvak, R. I. (2015). Plastychnistʹ metaliv pry nemonotonnomu navantazhenni [Plasticity of metals at nonmonotonic loading]. Tekhnika, enerhetyka, transport APC. Vinnytsya, 1(91). 108–111 [in Ukrainian].
[11]    Sivak, R. I. (2017). Evaluation of metal plasticity and research on the mechanics of pressure treatment processes under complex loading. Eastern-European journal of enterprise technologies, 6/7(90). 34–41. [in English].

All journal issues

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

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).