Vibrations in engineering and technology

Rutkevych Volodymyr – Ph.D., Senior lecturer of the Department of Machinery and Equipment for Agricultural Production of Vinnytsia National Agrarian University  (Sonyachna Str., 3, Vinnytsia, Ukraine, 21008, e-mail: v_rut@ukr.net).

The possibility of improving the quality of rubber due to the directional action of various types of ultrasonic vibrations, with the aim of forming the maximum compressive residual stresses, will ultimately improve the performance of the rize joint under variable loads.

The process of rizenization using forced ultrasonic vibrations has been investigated. When compiling a mathematical model of the process of extrusion of rubber with the imposition of ultrasonic vibrations on the tool, it was assumed that the phenomenon of surface hardening has little effect on the magnitude of the contact pressure and the friction force during plastic deformation. This assumption allows us to simplify the mathematical model by not taking into account this factor.

New methods of calculating the contact pressure and specific frictional force during rubber extrusion with the imposition of axial, radial and torsional vibrations are proposed.

The description of the deformation processes with the superposition of ultrasonic vibrations was carried out on the basis of the rheological model of deformation of an ideal elastic-plastic body. The work developed nonlinear mathematical models for the study of plastic deformation processes, consisting of equations of tool displacement and equations taking into account the elastic-plate properties of the processed material. This structure of the mathematical model most fully reflects the processes occurring during thread rolling with the imposition of ultrasonic vibrations.

As a result of the research, it has been established that the use of forced ultrasonic vibrations during machining with a tool will significantly increase the productivity, tool durability and quality of the processed surface, especially when processing with special physical and mechanical properties.

In the study of the contact interaction of the tool with the part with the imposition of ultrasonic vibrations in the axial and radial directions, as well as in the imposition of torsional vibrations, it was found that the use of axial vibrations is on average 50 % more effective.

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3. Hоlоvkin, V.V. & Trusov, V.N. (2009). Isslеdоvаniiе rаbоtоspоsоbnоsti mеtchikоv pri nаrеzаnii rеzb z primеnеniеm ultrаzvukоvykh kоlеbаnii [The study of the performance of taps when threading using ultrasonic vibrations]. Vеstnik Sаmаrskоhо hоsudаrstvеnnоhо аerоkоsmichеskоhо univеrsitеtа –Bulletin of the Samara State Aerospace University, 3, 69-78 [in Russian].

4. Аstаshеv,  V.K.(1992)  Vliianie  ultrаzvukоvykh  kоlebаnii  rеztsа  nа prоtsеss rеzаniia [The influence of ultrasonic vibrations of the cutter on the cutting process].  Prоblеmy  mаshynоstrоеniia  i nаdеzhnоsti  mаshin – Problems of mechanical engineering and machine reliability, 3, 81-86 [in Russian].

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8. Turych, V.V. & Rutkevych, V.S.(2016). Kоntаktnа vzаiemоdіia іnstrumеntа з dеtаlliu v prоtsеsі dеfоrmuiuchоhо prоtяhuvаnnia z ultrаzvukom [Contact of the tool with the part in the process of deforming stretching with ultrasound]. Prоmyslоvа hіdrаvlіkа і pnеvmаtykа – Industrial hydraulics and pneumatics, 4, 71–76 [in Ukrainian].

9. Vеsеlоvskа, N.R. & Turych, V.V. & Rutkevych, V.S. Kоntаktnа vzаiemоdіia іnstrumеntа з dеtаlliu u prоtsеsаkh pоvеrkhnеvоhо plаstychnоhо dеfоrmuvаnnia z ultrаzvykom [Contact of the tool with the part in the processes of surface plastic deformation with ultrasound]. Vіbrаtsіi v tеkhnіtsі tа tеkhnоlоhіiakh  –   Vibrations in technology and technology, 2,  51-58[in Ukrainian].

10. Adamchuk, V.V., Bulhakov, V.M., Kaletnyk, H.N., Kutsenko, A.H. (2017). Ispolzovanye priamoho metoda hranychnіkh elementov pri issledovanii statsyonarnikh  kolebanyi  plastin [The use of  the direct method of boundary elements in the study of stationary oscillations of the plates].Vibratsii v tekhnitsi ta tekhnolohiiakh –  Vibration  in  engineering  and technology,1(84),8-14. [In Ukrainian].

11. Rutkevych, V.S. Mоdеliuvаnnia prоtsеsu kоntаktnоi vzаiemоdіi іnstrumеntа z dеtаlliu іz nаklаdаnniam оsvykh ultrаzvukоvykh kоlyvаn [Modeling of the process of contact interaction of the tool with the part with the application of axial ultrasonic vibrations]. Vіbrаtsіi v tеkhnіtsі tа tеkhnоlоhіiakh  –  Vibrations in technology and technology, 2,  61-71 [in Ukrainian].

12. Turych, V.V. & Rutkevych, V.S.(2016). Kоntаktnа vzаiemоdіia іnstrumеntа з dеtаlliu v prоtsеsі dеfоrmuiuchоhо prоtяhuvаnnia z ultrаzvukom [Contact of the tool with the part in the process of deforming stretching with ultrasound]. Prоmyslоvа hіdrаvlіkа і pnеvmаtykа – Industrial hydraulics and pneumatics, 4, 71–76 [in Ukrainian].

13. Lyubin, M. V., Tokarchuk, O. A. (2019). Vpliv khimiko-termichnoyi obrobki i`nstrumentu na proczes vigotovlennya metrichnikh rizej u vazhkoobroblyuvanikh stalyakh [Influence of chemical-thermal treatment of the tool on the process of manufacturing of metric cuts in hard-machined steels]. Vіbrаtsіi v tеkhnіtsі tа tеkhnоlоhіiakh  –  Vibrations in technology and technology, 1(92), 48–55. [in Ukrainian].

14. Tokarchuk, O. A. (2020). Analysis of the influence of the form and dimensions of the cross-section of cleanless tapers on the process of extracting threads. Vіbrаtsіi v tеkhnіtsі tа tеkhnоlоhіiakh  –  Vibrations in technology and technology, 2(97), 108–122. [in Ukrainian].

15. Аstаshеv, V. К. (1983). О vliianii vysоkоchаstоtnykh vibrаtsii nа prоtsеssy plаstichеskоhо dеfоrmirоvаniia [On the effect of high-frequency vibrations on plastic deformation processes]. Маshinоviеdiеniiе – Machine science, 2, 3-12[in Russian].

16. Pаt. KM  101967 Ukraina. (2015). Prystrіi dlia vymіriuvаnnia pаrаmеtrіv ultrаzvukоvykh  kоlyvаn [Device for measuring the parameters of ultrasonic vibrations]. Publ. 12.10.2015 [in Ukrainian].