Vibration analysis and surface quality in turning of Ti-6Al-4V ELI alloys

One of the main limitations to increasing productivity in machining processes is the emergence of self-excited vibrations. In the turning of titanium alloys, due to its mechanical properties, the material presents low machinability and is prone to the appearance of chatter during processing. Therefore, for this purpose, the material is machined using moderate machining parameters, aiming for parts with a better surface finish and avoiding the appearance of chatter. Therefore, this work seeks to evaluate the influence of machining parameters, cutting speed, feed rate, and cutting depth on vibration during the process and on the roughness of the parts. For this, experiments were carried out varying these parameters, and then the influence of each of them was analyzed using the Taguchi method for planning experiments and signal-to-noise for analyzing the variability of the collected data. It was found that the cutting depth and feed have an influence on the vibration during, where the greater the parameter, the greater the RMS of the signal. And the roughness of the parts is influenced by the cutting speed, in which the higher the speed, the lower the roughness of the parts.