Experimental Investigation and Process Parameter Optimization on En353 with PCBN Inserts

Abstract

Machining of materials by super hard tool like PCBN is to reduce tool wear to obtain dimensional accuracy, smooth surface and more number of parts per cutting edge. Wear of tools inevitable due to rubbing action between work material and tool edge. However, the tool wear can be minimized by using super hard tools by enhancing the strength of the cutting inserts. Extensive study has been conducted in the past to optimize the process parameters in any machining process to have the best product. Current investigation on turning process is a Taguchi optimization technique applied on the most effective process parameters i.e. feed, cutting speed and depth of cut while machining the work piece with tool. The experiments were carried out by a CNC lathe, using PCBN tool for the machining of EN 353 steel. The Taguchi technique and ANOVA were used to obtain optimal Turning parameters in the Turning of SS420 under wet conditions. The optimal factor for Surface Roughness-A1(Speed-1500)B2(Feed-0.04)C3(DOC-0.75), Machining Timing-A1(Speed-1500)B2(Feed 0.04)C3(DOC 0.75), Material Removal Rate-A2(Speed-1750)B1(Feed 0.02)C3(DOC 0.75). The Percentage of contribution for each Process parameter is Surface Roughness-Speed 38.59%, Machining Timing-Speed 35.98%, Material Removal Rate-Feed 29.83%.