Hob wear prediction based on simulation of friction, heat fluxes, and cutting temperature

Autor: Ihor Hrytsay, Vadym Stupnytskyy
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Archive of Mechanical Engineering, Vol vol. 70, Iss No 2, Pp 271-286 (2023)
Druh dokumentu: article
ISSN: 2300-1895
DOI: 10.24425/ame.2023.145582
Popis: Based on comprehensive interrelated mathematical and graphical-analytical models, including 3D cut layers and simulation of contact, strain, force, and thermal processes during gear hobbing friction forces, heat fluxes, and temperature on the teeth of the hob surface are investigated. Various physical phenomena are responsible for their wear: friction on contact surfaces and thermal flow. These factors act independently of each other; therefore, the worn areas are localized in different active parts of the hob. Friction causes abrasive wear and heat fluxes result in heat softening of the tool. Intense heat fluxes due to significant friction, acting on areas of limited area, lead to temperatures exceeding the critical temperature on certain edges of the high-speed cutter. Simulation results enable identification of high-temperature areas on the working surface of cutting edges, where wear is caused by various reasons, and make it possible to select different methods of hardening these surfaces. To create protective coatings with maximum heat resistance, it is advisable to use laser technologies, electro spark alloying, or plasma spraying, and for coatings that provide reduction of friction on the surfaces – formation of diamond-containing layers with minimum adhesion properties and low friction coefficient on the corresponding surfaces.
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