TO INVESTIGATE THE EFFECTS OF MACHINING PARAMETERS ON SURFACE ROUGHNESS AND MRR FOR AISI 304 STAINLESS STEEL ON CNC LATHE by Amritpal Singh
Abstract
Turning is the basic operation in machining process which is used in manufacturing industries and is very essential to optimize the various input cutting parameters affecting turning process for the optimal results. The turning process is influenced by many factors such as spindle speed, feed, depth of cut, insert radius etc. In order to control the output parameters that are MRR and Surface roughness, it is very necessary to control these input parameters. Taguchi design of method is very efficient for the optimization of these output parameters in turning process. The main objective of our work is to obtain an optimal setting of input parameters in turning to reduce the surface roughness and increase the material removal rate. The cutting speed, Feed rate, depth of cut and insert radius are considered as input parameters which are directly affects the surface roughness and material removal rate of the work material. Stainless steel AISI 304 is used as a work piece which is machined by TiCN-Al2O3 mixed ceramic insert. The results concluded that cutting speed has a most influence factor which affects the Surface roughness. Surface roughness is reduced with high cutting speed, low feed, low depth of cut and high nose radius. The high cutting speed 1000 RPM, larger nose radius 1.2 mm with low feed rate 0.10 mm /rev and low depth of cut 0.50 mm would reduce the surface roughness, Ra. The material removal rate is influenced by all input parameters i.e. MRR is increases with increasing insert radius, cutting speed, feed and depth of cut.
