Issue №: 1(116)
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.
CUTTER-OSCILLATOR FOR THE STUDY OF SELF- OSCILLATIONS IN TURNING THAT EXCLUDES THE REGENERATIVE EFFECT
Tryshyn Pavlo – Ph. D., Associate Professor of the Department of Mechanical Engineering Technology, National University “Zaporizhzhia Polytechnic”, Zaporizhzhia (69000, 64 Zhukovsky St., Zaporizhia, Ukraine, e-mail: trishin@zp.edu.ua), ORCID 0000-0002-3301-5124
Kozlova Olena – Ph. D., Associate Professor of the Department of Mechanical Engineering Technology, National University “Zaporizhzhia Polytechnic”, (69000, 64 Zhukovsky St., Zaporizhia, Ukraine, e-mail: kozlova@zp.edu.ua), ORCID 0000-0002-3478-5913.
To study vibrations during turning, dynamometers are used, which are important tools for measuring cutting force - one of the main parameters characterizing the state of the cutting process. Cutting force demonstrates high sensitivity to vibrations and is an important indicator for assessing system behavior compared to other methods, such as acoustic emission. However, force sensors have some limitations: they are often bulky and have a limited operating range. Dynamometers operate on the principle of static equilibrium between cutting force and the elastic force of the device itself, which allows for accurate measurement of forces during the cutting process. However, this also means that elastic, frictional and inertial forces arising in the dynamometer itself can affect the accuracy of measurements. The aim of the work was to conduct a theoretical analysis and propose a design for a cutter-oscillator with one degree of freedom. The direction of the resulting movement of the cutting edge of this oscillator coincides with the direction of the cutting speed (Z axis), which allows us to study the conditions of excitation, development and suppression of self-oscillations in conditions where there is no regenerative effect and coordinate connection. The cutter-oscillator allows us to study in more detail the mechanisms of excitation of oscillations in the cutting process and their interaction with other parameters. For the experiments, a special design of a device for mounting the cutter-oscillator on a machine tool was developed, which allows us to attach an additional mass and change the length of the flight. This made it possible to adjust the rigidity of the system, inertia and natural frequency of oscillation, which is important for fine-tuning the turning process. In addition, an experimental and measuring stand was created that allows us to record oscillograms of the oscillatory motion of the cutting edge of the cutter-oscillator. This made it possible to study different types of oscillations, such as free, free accompanying, forced and self-oscillations, which arise when cutting conditions change - from continuous to intermittent and non-stationary.
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About the journal
The journal "Vibrations in Engineering and Technologies" is included in the list of technical scientific publications of Ukraine
(Category "B", Order of the Ministry of Education and Science of Ukraine dated July 2, 2020 No. 886)
Old version of the site: http://vibrojournal.vsau.edu.ua/
The journal "Vibrations in Engineering and Technology" is indexed by the following databases and catalogs:
The certificateof massmedia State registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University
The journal is devoted to highlighting current issues in engineering, mechanical engineering, and technological processes, including the study of dynamic and oscillatory phenomena in technical systems, the application of mathematical methods for process modeling and analysis, as well as the presentation of results of design-engineering and technological developments. Particular attention is given to the study of vibration processes and their application in modern technologies.
The purpose of the scientific journal “Vibrations in Engineering and Technologies” is to disseminate the results of fundamental and applied research in the field of engineering sciences aimed at developing theoretical foundations and practical approaches to the design, analysis, and improvement of machines, materials, and technological processes, including the use of vibration and oscillatory effects in various sectors of production.
The publication is focused on the formation of a modern scientific and informational environment for the effective exchange of research results, support of innovative development, and implementation of advanced technical solutions in industry, agro-industrial production, and related fields.
The journal promotes the development of interdisciplinary research, the integration of modern engineering approaches, and the enhancement of the efficiency of technological processes and technical systems, including through the rational use of vibration phenomena.
Objectives of the Scientific Journal
To achieve its stated purpose, the journal addresses the following key objectives:
dissemination of results of fundamental and applied scientific research in the fields of mechanics, mechanical engineering, technological processes, machine dynamics, and equipment, as well as in areas related to the application of vibration phenomena in engineering and technologies;
promotion of research aimed at the creation and improvement of machines, mechanisms, and technological equipment based on oscillatory and vibration processes;
support for the implementation of modern technological solutions focused on improving productivity, energy efficiency, and reliability of technical systems;
обеспечение scientific exchange of research results among research institutions, higher education establishments, and industrial enterprises;
development of interdisciplinary cooperation among researchers in the fields of mechanics, materials science, material processing technologies, and automation of technological processes;
dissemination of modern scientific achievements and advanced technologies related to the application of vibration processes in production and technical systems.
Publisher Vinnytsia National Agrarian University
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 119 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Ihor Kupchuk, Candidate of Technical Sciences, Associate professor, Associate Professor of the Department of Engineering Mechanics and Technological Processes in the Agricultural Industry Faculty of Engineering and Technology Vinnytsia National Agrarian University 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.
