Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
NUMERICAL ANALYSIS OF THE INFLUENCE OF COATINGS IN A CUTTING TOOL USING COMSOL
Submission Author:
Sandro Metrevelle Marcondes de Lima e Silva , MG , Brazil
Co-Authors:
Diego Ferreira, Sandro Metrevelle Marcondes de Lima e Silva, Luís Felipe dos Santos Carollo
Presenter: Diego Ferreira
doi://10.26678/ABCM.ENCIT2018.CIT18-0445
Abstract
The determination of the thermal field in a turning process is fundamental to improve the process quality. Recently, the carbide tools have been coated with ceramic materials that present insulating characteristics. This work presents the thermal effects of coating in a carbide tool during a turning process using the COMSOL® software and a non-linear inverse problem. The thermal model consists of a coated carbide tool, a tool holder and a shim described by the transient three-dimensional heat diffusion equation with heat loss by convection and radiation. The unknown heat source was obtained through the Function Specification Method. In order to validate the methodology, the heat input was compared with previous work. Titanium nitride (TiN) and aluminium oxide (Al2O3) are utilized as the coating materials. Both coatings presented the expected behavior when less heat is dissipated to the cutting tool substrate. The coated carbide tools presented higher maximum temperatures in the contact area than the uncoated carbide tool. The study also found that as the coating thickness increases the maximum temperature in the contact area also increases. The results presented in this work may help the development of new coated carbide tools with a longer lifespan
Keywords
Inverse problems, Coatings, Heat flux estimation, Cutting process, COMSOL
