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Vibrations in engineering and technology

space SCIENTIFIC JOURNALS OF VINNITSA NATIONAL AGRARIAN UNIVERSITY

Issue №: 1(100)

Published: 2021.03.23
DOI: 10.37128/2306-8744-2021-1


Description:
The journal deals with the problems of vibration technologies and machines, mathematical methods of vibration process studies, information on design and technological development, presents teaching and methodological aspects of teaching in the Higher School of Applied Sciences, where vibration machines and technologies are studied.

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DEVELOPMENT OF THE COMBINED TECHNOLOGICAL PROCESS OF BLANK STACKS FLANGES FORMATION BY THE METHOD OF STAMPING BY ROLLING AND ROTARY DRAWING

DOI: 10.37128/2306-8744-2021-1-11
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Matviychuk Viktor – Doctor of Technical Sciences, Full Professor, Head of the Department of Electric Power Stations and Systems of the Vinnytsia National Agrarian University (3 Soniachna St., Vinnytsia, 21008, Ukraine, email: vamatv50@gmail.com)

Kolisnyk Mykola – Postgraduate Student of Vinnytsia National Agrarian University (3 Soniachna St., Vinnytsia, 21008, Ukraine, email: kolisnik30@gmail.com)

 

Annotation

The article presents the results of the development and research of the combined technological process of forming the outer and inner flanges of the lids of fractional and distillation columns on sheet blanks by the method of stamping by rolling and rotary drawing. For this purpose, equipment has been developed that allows to form both outer and inner flanges of the blank in one run of the conical roll.

Studies have shown that technological capabilities of the process are limited by the risk of destruction of the top layers of the outer flange bending center and its corrugation, as well as by the neck formation or destruction of the peripheral areas of the inner flange. To assess the deformability of the outer flange, the stress-strain state of its bending center was investigated. According to the set stress values, the stress state of the material is determined, the maximum value of which on the surface of the bending zone is   Formula for determining the minimum radius of the mandrel, which when using the values of the critical ductility of the material allows to prevent destruction. As well, an expression for determining the maximum width of the flange, provided that the destruction of peripheral areas is prevented, is obtained.

As corrugations formation is the main danger in forming the external flanges by the stamping by rolling method (SR), the expression for determining the maximum width of the flange under the condition of a stable process is obtained. If it is necessary to get more developed flanges, it is proposed to provide thinning of their walls by rotary extraction at the second stage.

When forming the inner flanges of the blank stacks radial compressive stresses and tangential tensile stresses in the material are brought about. The action of tangential stresses causes loss of stability of the flange by way of neck formation. The value of the critical strains increases with the approach to the state of plain-strain deformation. Therefore, it is recommended to develop process parameters based on construction of the critical strains diagrams.

 

Keywords: rolling stamping, rotary drawing, outer and inner flanges, blank stacks, strain, fructure, loss of stability.

List of references

1. Mogilny N.I. (1983). Rotational drawing of shell parts on machine tools. Mashinostroenie. [in Russia].

2. Matviichuk, V. A., Aliyev, I. S. (2009). Sovershenstvovanie processov lokal'noj rotacionnoj obrabotki davleniem na osnove analiza deformiruemosti metallov: Monografija [Improvement of processes of local rotary pressure treatment on the basis of the analysis of metal deformability: Monograph]. Kramatorsk: DGMA [in Ukrainian].

3. Popov E.A. (1977). Foundations of the theory of sheet stamping. Mechanical. [in Russia].

4. Barkaya V. F. (1976). Forming sheet metal. Metallurgy. [in Ukrainian].

5. Barkaya V.F., Ruzanov F.I. (1973). Determination of the critical width of the flange during rotary rolling of cylindrical shells. Forging and stamping production. [in Russia].

6. Del G.D., Osipov S.S. (1987). Limiting deformations in the formation of parts from a sheet. Izvestiya vuzov. Aviation technology. [in Russia].

7. Kaletnik, G. (2013) Osnovy inzhenernykh metodiv rozrakhunkiv na mitsnist i zhorstkist [Basic engineering methods of rosrahunkiv on the city and the market] Kiev: “High-Tech Press” [in Ukrainian].

8. Sivak, R. (2017). Evaluation of metal plasticity and research on the mechanics of pressure treatment processes under complex loading. Eastern-European journal of enterprise technologies. [in English].

 

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About journal

Topics of the journal:

The journal "Vibrations   in engineering  and technology" presents materials on the following issues

• Theory of processes and machines
• Mechanical Engineering and materialprocessing
• Processing and food production

Key information:
ISSN (print): 2306-8744
DOI: 10.37128/2306-8744

The certificateof massmediaState registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University

Kind of publication: journal
Type of publication : Scientific
Publication status: Domestic
Year of founding:
Periodicity: 4 times a year
Extent: 18.75 nominal printed pages
ISSN: 2306-8744 (printed version), (online)
Language of edition  : (mixed languages) Ukrainian, Russian, English
The scope of the distribution and the category of readers: national, foreign, teaching staff, scientists, businessmen.
Periodical is included in the list of scientific professional editions of Ukraine approved by the Order of Ministry of Education and Sciences of Ukraine from 21.12.2015 No. 1328.
The journal "Vibrations in engineering and technology" is included in the "Catalogue of periodicals of Ukraine".
Journal subscription can be executed in each post office department.
 Subscription Index is  99720.

 

Old version of site: http://vibrojournal.vsau.edu.ua/

History of journal:

In June 1994 the 2nd International Scientific and Technical Conference "Application of vibrations for technological purposes" was organized on the basis of Vinnytsia State Agricultural Institute. Leading experts in this field, noting the significant contribution to the school of Vibration Engineering under the leadership of P. S. Bernyk, proposed to create a professional all-Ukrainian scientific and technical journal "Vibration in engineering and technology..The journal was foundedat Vinnytsia State Agricultural Institute and P.S. Bernyk was elected to be the chief editor .
For all these years (since 1994) theJournal "vibration in engineering and technology" published  94 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Kaletnik H.M  PhD , professor, academician NAAS is the chief editor of the "Vibrations in engineering  and Technology"
The journal "Vibration in Engineering and technology", which has no analogues on the territory of Ukraine, is well known abroad.