Investigation on laser based positive texturing of single point cutting tool using additive manufacturing route

Abstract

Researches in dry machining have shown that surface texturing has the potential to enhance tribological conditions. Researchers have studied the effects of surface texturing on cutting tool rack surfaces to enhance the machining performance by inducing change in the tribological conditions at the interface of tool and chip. An investigation on the effects of positive texturing on high-speed steel cutting tool for machining of mild steel rod was performed. Positive textures were introduced using continuous laser power & Nickel powder. Dry machining operation is performed on mild steel (EN3B) work-piece in lathe machine with textured and Non textured cutting tool keeping the feed and depth of cut as constant and varying the cutting speeds. Measurement of forces acting on the tool, cutting tool temperature while machining and comparison of chip size was made. The results exhibit reduction in cutting force requirement and cutting tool temperature in case of textured tool. Chips collected at different speed have been compared and the results showed that textured tool exhibits reduction in chip size. Performance of Textured and non-textured tools were investigated and the results of the experimental study are presented in this thesis.