Análise da influência dos parâmetros de corte na qualidade superficial no torneamento cilíndrico do alumínio 6351-T6 no corte a seco e com fluido lubrificante

Abstract

The increase of pruduct quality, delivery time and productivity of machined parts are the main challenges of machining. Thereby, there was an increasing in studying and optimizing machining conditions that meet the requirements of a good manufacture. Surface quality is considered one of the most important features in the analysis of manufacturing criteria. Surface roughness assumes an essential effect on wear resistance, ductility, fatigue strength among others. Seeing the importance of roughness, This work aims to study the influence of depth of cut, feed and rotation on surface roughness in the cylindrical turning of aluminum, which is a widely used material in the industry. The analysis was done for dry turning and one for turning using a lubricant. In both cases, two cutting tools were used, one with radius 0.4 mm and one with 0.8 mm. The parameters were evaluated jointly using the methodology called DOE (Design of Experiments). The results showed that the feed and the tool radius were the ones that most influenced the roughness and the use or not of cutting fluid is negligible. Regarding optimization, the levels of the factors that ensured the best results were 460 rpm rotation, 0.156 mm / rev feed, 0.15 mm cutting depth, 0.8 mm nose radius and environment with cutting fluid. Futhermore, the regression model found for roughness Ra and Rz had an accuracy of 96,76 and 91,21%, respectively.