Experimental Investigation Of Turning Operation Using Other Edges Of Carbide Turning Insert

This paper represents an investigation on optimization of effect of cutting parameters on work piece surface roughness by using other edge turning boring bar & other edge of CNMG 120408 insert. This size is mainly used in industry for turning operations. CNMG is a negative insert having angle 80 & its four edges are used .But other edges are not used which are available in insert. Therefor we use other edge boring bar, which is prepared according to size of CNMG insert for this experiment. In this work we optimize the effect of this other edge tool & insert on the surface of work piece .This is the economical machining process , because mostly in industry the inserts are dispose off after usage of four edges , but we can use other four edges . Therefore we are able to use the eight edges of insert ,which is beneficial .By using other edges of inserts we can able to reduce the tooling cost as well as per piece cost . In this experimental work we use the other edges of PVD coated carbide turning insert due to its properties &characteristics .The design of experiment is prepared by using taguchimethodlogy .In this experiment EN8 steel material is used. In this, we analyses the effect of Surface Roughness and Material Removal Rate (MRR) due to cutting parameters by using Taguchi method. The optimization is done using twenty seven experimental runs based on L'27 orthogonal array of the Taguchi method, and are performed to derive objective functions to be optimized within the experimental domain.