The effect of atomized soybean oil emulsions on cutting performance

In the thesis, a cutting fluid is produced with in the scope of sustainable production. This cutting fluid is an alternative to cutting fluids consisting of synthetic and semi-synthetic oils which are harmful to nature and human. Water and soybean oil mixture is pulverized by ultrasonic atomization method and used by sprayed with 4 bar pressure compressed air. The aimed of in this study, to investigate the effects of Ç 4140 steel on machinability on CNC turning machine with uncoated carbide cutting tool (SECO WNMG 080404-M1). Three cutting speeds (150, 200, 250 m/min), Three feed rate (0.1, 0.15, 0.2 mm/rev), four coolants (1%, 5%, 10% soybean oil-water mix and commercial coolant) were compared by doing experiments under dry shear conditions. In all experiments, the cutting depth was 1 mm and the cutting length was 100 mm. At the end of the experiments, cutting force, surface roughness and tool wear values were examined. The best results for all parameters were obtained by spraying 10% soybean oil -water mixture using ultrasonic atomizer. A decrease in cutting forces, surface roughness and an increase in tool life were observed. The worst values were obtained in dry shear tests. The results were analyzed by ANOVA method and the results were evaluated with 3B surface graphics. After the analysis results were evaluated, percentage effect rates, regression analysis equations and optimization values were suggested. Keywords: Sustainable production, Vegetable cutting fluid, Ultrasonic atomizer, Tool wear, Cutting force, Surface roughness.