Análise experimental da temperatura no torneamento do aço ferramenta VTMPLUS com pastilha cerâmica Al2O3/TiCN empregando câmeras termográficas

Abstract

This study aims to analyze the influence of cutting parameters and the wear of the TNGA 160404T ceramic tool on thermal behavior during the machining process, using thermographic monitoring to examine the relationship between variations in machining parameters and temperature throughout the process and to assess the feasibility of this type of monitoring. Different methods and equipment for temperature monitoring were evaluated, focusing on the analysis of variations in machining parameters and tool wear. The results indicated that the FLIR ONE PRO thermal camera is not suitable for thermal monitoring in machining due to its inability to provide measurements consistent with the dynamics of the process. In contrast, the FLIR T530 camera yielded satisfactory results, allowing identification of cutting speed as the parameter that generates the highest average temperatures, while cutting depth showed consistent results regardless of tool wear. Additionally, it was observed that the chip generated during turning significantly interferes with thermal monitoring, obstructing and overlapping the contact point between the workpiece and the tool, causing fluctuations in the measured temperatures. ANOVA analysis revealed that the parameter with the most significant impact on temperature was feed rate. It was also found that the temperature in turning operations with a worn insert showed greater temperature variations compared to a new insert, suggesting that temperature variation could be an indicator of tool wear.