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In this study, we performed experimental and statistical analysis on the cutting of AISI 304 stainless steel using a commonly utilized laser cutting machine. Three different gas pressures (5.1, 6.4 and 8 bar), three different cutting speeds (2048, 2560 and 3200 mm/min), fixed focal point (-4 mm), fixed frequency (5000 Hz) and fixed gas (Nitrogen) were used as cutting parameters. As a result of the study, it was observed that the surface roughness decreased as the cutting speed increased at all pressure values, and the surface roughness increased as the pressure increased at all cutting speed values. It was determined that the top and bottom kerf width decreased with increasing cutting speed and decreasing gas pressure, and the top and bottom kerf width increased with increasing gas pressure and decreasing cutting speed. When the signal/noise ratios were analyzed as a result of Taguchi analysis, the optimum cutting parameter was calculated as Level 1 (5.1 bar) for pressure and Level 3 (3200 mm/min) for cutting speed. When the variance results were analyzed, it was determined that the important parameter affecting the surface roughness from the pressure and cutting speed factors was determined as cutting speed with 70.74%. [ABSTRACT FROM AUTHOR]

In this study, the effects of cutting tool height adjustment on cutting force components in turning were investigated. The experiments were carried out on a CNC lathe using AISI304 stainless steel material, which is a reference material. In the experiments, carbide inserts with a SNMG form were used. The cutting tools were tested for three different levels: at the part axis (0 mm), above of the part axis (+0.5 mm), and at below of the part axis (-0.5 mm). Moreover, three different cutting speeds (100, 150 and 225 m/min), three different feeds (0.15, 0.25 and 0.35 mm/rev), three different depths of cut (0.8, 1.3 and 2 mm) and two different insert radius (0.4 and 0.8 mm) were considered into experiments. Cutting force components (Fc, Ff, Fr) were measured instantaneously with a standard dynamometer. Taguchi and ANOVA analysis were done to figure out the effect of the setting of the cutting tool height on the cutting forces. As a result of the evaluation, it is seen that the cutting forces were obtained lower when the cutting tool is adjustment at the part axis and above of the part axis. Otherwise, the cutting forces were measured higher, while the setting the height of cutting tool is at below of the part axis. As the depth of cut and feed rate increased in the experiments, the effect of cutting tool height adjustment on cutting forces also increased. The parameters that are the depth of cut and the feed rate were identified the major effect on the cutting forces. [ABSTRACT FROM AUTHOR]