EFFECT OF MACHINING PARAMETERS ON SURFACE ROUGHNESS IN CNC TURNING

Abstract

Surface roughness is one of the important criteria for product quality in manufacturing processes. It depends on many factors according to different manufacturing processes. In relation to the operation of the lathes, which is the focus of our study, it was found that the controllable factors affecting surface smoothness are (cutting speed, feeding rate and depth of cut). Samples of mild steel are used for the experiment; with different settings. Readings of the surface roughness are measured using sensitive digital devices, and then analyzed using octave programs. The experimental results and graphs showed that the surface roughness is greatly affected by the cutting parameters, and using of cooling liquid. The results obtained from this work showed that the surface roughness decreases with increasing spindle speed, decreasing cutting depth and feed.