DOI: https://doi.org/10.15587/2312-8372.2019.157827

Investigation of the influence of vibration oscillations in the processes of strengthening processing of machine parts

Anatolii Dudnikov, Vladimir Dudnik, Oleksander Kanivets, Oleksandra Bilovod, Oleksii Burlaka

Abstract


The object of research is the technological process of improving the reliability of the recovery of ploughshare disks of grain seeders by vibration hardening. One of the most problematic places is the lack of knowledge of this process in the restoration of agricultural machinery. For the emergence of a deeper understanding of the process of vibration hardening of the material of parts, it is necessary to conduct experimental studies on the effect of processing parameters on the hardening degree.

In the course of research, the process of vibration hardening of the weld surface is carried out on a vibration installation made by the authors of this study. To select processing parameters and determine their optimal values, microstructural studies of the disk material are carried out. The main parameters of hardening are revealed and substantiated: amplitude and frequency of oscillations of the processing tool, hardening time, and their values are determined: A=0.5 mm; n=1400 min-1; t=20 s.

As a result of the research, it is established that during vibration hardening, the structure of the material is more fine-grained. The increase in microhardness on the surface of the deposited layer can be explained by the greater fragmentation of grains and an increase in their number. This, in turn, causes the activation of dislocations in all grains adjacent to the surface. During vibration deformation, the length of the grain boundaries increases and thereby more dislocation slip zones are formed. This can explain the hardening mechanism.

The evaluation of the operational reliability of the disks on the following indicators: the performance per season and the coefficient of technical use. For seeders with discs restored by welding segments with sormite surfacing and vibration strengthening, the coefficient of technical use is 1.053 times higher than for seeders with new discs.

Thanks to the use of the developed restoration technology, it is possible to reduce the blade blunting speed by 1.49–1.70 times. This provides an increase in the operation time. Compared with similar known technologies, the developed technology of vibration hardening of blades provides the greatest wear resistance and an increase of 1.34 times the operating time compared to new discs.


Keywords


technological treatment process; vibration hardening; wear resistance of parts; coefficient of technical readiness

References


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Lou, Y., He, J. S., Chen, H., Long, M. (2017). Effects of vibration amplitude and relative grain size on the rheological behavior of copper during ultrasonic-assisted microextrusion. The International Journal of Advanced Manufacturing Technology, 89 (5-8), 2421–2433. doi: http://doi.org/10.1007/s00170-016-9288-7

Gichan, V. (2011). Active control of the process and results of treatment. Journal of Vibroengineering, 13 (2), 371–375.

Jurcius, A., Valiulis, A., Kumslytis, V. (2008). Vibratory stress relieving – it's advantages as analternative to thermal treatment. Journal of Vibroengineering, 10 (1), 123–127.

Djema, M. A., Hamouda, K., Babichev, A. P., Saidi, D., Halimi, D. (2012). The Impact of Mechanical Vibration on the Hardening of Metallic Surface. Advanced Materials Research, 626, 90–94. doi: http://doi.org/10.4028/www.scientific.net/amr.626.90

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GOST Style Citations


Kaledin B. A., Chepa P. A. Povyshenie dolgovechnosti detaley poverkhnostnym deformirovaniem. Minsk: Nauka i tekhnika, 1984. 230 p.

Oleynik N. V., Kravchuk V. S. Snizhenie materialoemkosti detaley, uprochnennykh poverkhnostnym plasticheskim deformirovaniem. Kyiv: Naukova Dumka, 1982. P. 104–109.

Downham E. Vibration in rotating machinery: Malfunction diagnosis – Art Science // Proceedings of the Institution of Mechanical Engineers – Vibrations in Rotating Machinery. 1986. P. 1–6.

Ramesh K. T. Nanomaterials: Mechanics and Mechanisms. Boston: Springer, 2009. 316 p. doi: http://doi.org/10.1007/978-0-387-09783-1 

Zaika P. M. Teoriia silskohospodarskykh mashyn. Kharkiv: OKO, 2001. 443 p.

Bowden F. P., Tabor D. The friction and lubrication of solids. Oxford University Press, 2001. 424 p.

Cameron T., Yarin A. Handbook of experimental fluid Mechanics. Springer, 2007. 1557 p.

Prokof'ev P. I. O grafoanaliticheskom modelirovanii formoobrazovaniya lezviya pri iznashivanii nozhey sel'skokhozyaystvennykh mashin. Kyiv: Tekhnika, 1982. 284 p.

Chernovol M. I. Povyshenie kachestva vosstanovleniya detaley mashin. Kyiv: Tekhnika, 1989. 168 p.

Dynamics of wear of the cutting elements of tillers / Dudnykov A. et. al. // Annals of Warsaw University of Life Science. 2015. Issue 65. P. 15–19.

Nikolaenko A., Hussein A. T. Modeling of vibrating machine-tool with improved construction // ТЕKA. Commission of motorization and energetics in agriculture. 2014. Vol. 14, Issue 1. P. 174–181. URL: http://www.pan-ol.lublin.pl/wydawnictwa/TMot14_1/Teka_14_1.pdf

Effect of the Velocity of Rotation in the Process of Vibration Grinding on the Surface State / Hamouda K. et. al. // Materials Science. 2016. Vol. 52, Issue 2. P. 216–221. doi: http://doi.org/10.1007/s11003-016-9946-9 

Surface Modification of Products by Plastic Deformation and the Application of Functional Coatings / Belevskii L. S. et. al. // Metallurgist. 2016. Vol. 60, Issue 3-4. P. 434–439. doi: http://doi.org/10.1007/s11015-016-0310-y 

Effects of vibration amplitude and relative grain size on the rheological behavior of copper during ultrasonic-assisted microextrusion / Lou Y. et. al. // The International Journal of Advanced Manufacturing Technology. 2017. Vol. 89, Issue 5-8. P. 2421–2433. doi: http://doi.org/10.1007/s00170-016-9288-7 

Gichan V. Active control of the process and results of treatment // Journal of Vibroengineering. 2011. Vol. 13, Issue 2. Р. 371–375.

Jurcius A., Valiulis A., Kumslytis V. Vibratory stress relieving – it's advantages as analternative to thermal treatment // Journal of Vibroengineering. 2008. Vol. 10, Issue 1. Р. 123–127.

The Impact of Mechanical Vibration on the Hardening of Metallic Surface / Djema M. A. et. al. // Advanced Materials Research. 2012. Vol. 626. P. 90–94. doi: http://doi.org/10.4028/www.scientific.net/amr.626.90 

Kanivets O. V. Obgruntuvannia parametriv protsesu vidnovlennia ta pidvyshchennia nadiinosti dyskiv soshnykiv zernovykh sivalok: PhD theses. Kharkiv, 2012. 22 p.







Copyright (c) 2019 Anatolii Dudnikov, Vladimir Dudnik, Oleksander Kanivets, Oleksandra Bilovod, Oleksii Burlaka

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ISSN (print) 2664-9969, ISSN (on-line) 2706-5448