KEKASARAN PERMUKAAN NYLON PA6 HASIL TURNING MESIN CNC DENGAN VARIASI DEPT OF CUT DAN FEED RATE

Surface roughenss is a widely used product quality index and is one of the technical requirements for a mechanical product and achieving the desired surface quality is very important for the functional behavior of a part. The choice of cutting parameters in the turning process is predicted to affect the surface roughness of the machining results. This study aims to determine whether there is an effect of choosing a variety of cutting parameters on the surface roughness of turning results on CNC machines. Variation in cutting in the form of variatons in depth of cut ( DOC ) and feed rare ( Feed rate ). The research method was carried out by testing using a TU-2A CNC machine and for surface roughness testing was carried out using a JD 360 surface roughness tester on nylon PA6 material. Data analysis using line and bar graphs. The result of the analysis of variations in the selection of cutting parameters show that the depth of cut and the feed speed have an influence on the surface roughness of the PA6 nylon material. It was found that higher the depth of cut used, the higher or rougher Ra or surface roughness was used, whereas the higher the feed rate used, the smaller or smoother Ra or surface roughness was obtained