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Modelling of Temperature Field and Stress–Strain State of the Workpiece with Plasma Coatings during Surface Grinding

1
Odessa National Polytechnic University (ONPU), Schevchenko av. 1, 65044 Odessa, Ukraine
2
SaTCIP Publisher Ltd., 36210 Vrnjačka Banja, Serbia
*
Author to whom correspondence should be addressed.
Machines 2019, 7(1), 20; https://doi.org/10.3390/machines7010020
Received: 29 December 2018 / Revised: 14 March 2019 / Accepted: 17 March 2019 / Published: 22 March 2019
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Abstract

Plasma coatings play a key role in surface tailoring through providing important advantages for tools during their further application. However, grinding these coatings may cause different defects such as grinding burns and cracks, structural changes to the coating material, and the destruction of adhesive contacts between the coating layer and the substrate. The reason for that is the high heat flux generated in the process of abrasive material removal due to the high friction and stresses. In order to define the optimal conditions for grinding plasma coatings, the mathematical model of the temperature thermal field and the stress–strain state during the grinding process is developed. Based on the temperature, strength, and fracture criteria, this mathematical model makes it possible to define the functional relationship between the technological characteristics of the grinding process and the conditions that provide the required quality of surface processing. The role of the structural defects that are generated while coatings are being sprayed, as well as during coating adhesion, is also considered. An algorithm developed to present the results of the modelling process enables checking if the input parameters meet the condition of zero-defect grinding of a workpiece, and determining an expected surface roughness. Input parameters include the grinding wheel geometry, its abrasive properties, the wheel speed, longitudinal and transverse motion, grinding depth, and the use of the cutting fluid. Experimental testing of this study shows the way in which the regime of the grinding process and different grinding wheel parameters influence the physical and mechanical properties of the surface layer. View Full-Text
Keywords: surface grinding; plasma coatings; mathematical model; surface quality; temperature field; stress–strain state surface grinding; plasma coatings; mathematical model; surface quality; temperature field; stress–strain state
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Usov, A.V.; Tonkonogyi, V.M.; Dašić, P.V.; Rybak, O.V. Modelling of Temperature Field and Stress–Strain State of the Workpiece with Plasma Coatings during Surface Grinding. Machines 2019, 7, 20.

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