Investigation of machining parameters that affects surface roughness and cutting forces in milling of CFRPs with TiAlN and TiN coated carbide cutting tools

In this research, carbon fiber reinforced polymer (CRFP) samples were milled at different cutting speeds and feed-rates. Milling of CFRP samples was performed using carbide cutting tools with TiAlN and TiN coatings which were deposited with physical vapor deposition (PVD) method. The effect of milling parameters on the surface roughness of the machined samples and resulting cutting forces was evaluated. The lowest average surface roughness was obtained with TiAlN coated cutting tools at 300 m min(-1) cutting speed and 0.05 mm/tooth feed-rate. The highest average surface roughness was obtained with TiN coated cutting tool at 100 m min(-1) cutting speed and 0.25 mm/tooth feed-rate. The lowest cutting force was obtained with TiAlN coated cutting tools at 300 m min(-1) cutting speed and 0.05 mm/tooth feed-rate. The highest cutting force was obtained with TiN coated cutting tools at 100 m min(-1) cutting speed and 0.25 mm/tooth feed-rate. Throughout the conducted tests, cutting tools with TiAlN coating were found to show superior machining performance over the others at different surface roughness and feed-rate machining parameters.