Optimization of turning process variables for surface integrity using taguchi technique

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The selection of proper machining parameters is crucial for the production of a product of desired quality. The Taguchi method will accomplish this. For this work, using tin coated tungsten carbide method, SS-321 work parts are placed onto CNC lathe machine. Stainless steel machining (SS-321) has issues such as worn-out tool and high roughness to the surface. The key reasons for choosing SS-321 grade as workpiece material is the issue of the machining process related with super finishing of Stainless Steel. For this work twenty-seven experiments were carried out on stainless steel (SS-321), as per Taguchi’s L27 orthogonal array. Data analysis was carried out using Taguchi response table method and ANOVA. Following this method, a confirmation experiment was performed to assess the surface integrity change. Turning machining parameter levels to reduce surface roughness were A1B3C1 i.e., depth of cut 0.5 mm, cutting speed of 120 m / min and feed of 0.2 mm / rev. ANOVA table represented the parameters which mostly affected the surface roughness with 76.27% contribution of depth of cut which is maximum followed by feed (7.72%), and effect of speed (3.48%) is insignificant. The research also shows that this approach can efficiently boost the surface finish of the turning process.