Comparison of novel tin coated and uncoated carbide tool in CNC wet turning of EN31 to maximize material removal rate.

This research is about the comparison of novel TiN coated and uncoated carbide tools in CNC wet turning of EN31 to maximize material removal rate. Materials and methods: Work material used was EN31 tool steel and cutting tools used was novel TiN coated and uncoated carbide tools with the tool designation of CNMG120408 (Make: Widia). The three input parameters selected for present experimental study are cutting speed (m/min), feed (mm/rev) and depth of cut (mm), each parameter varied at 3 different levels and L9 experimental runs are conducted. Two groups of experimental study are selected (novel TiN coated and uncoated) with 27 samples per group. On the whole 54 samples were collected and measured for 2 groups. Result: Material removal rate obtained on the novel TiN coated carbide tool is maximized when compared with the uncoated carbide tool by 3.8% during machining of EN31 tool steel. The obtained mean value for coated carbide tool was 83.75789, and for uncoated carbide tool was 943.68333, The results are statistically analysed with the use of a SPSS software and graphs were plotted and its level of significance was found to be 0.041 (p<0.05). Conclusion: By the limitations of the study we can conclude that for the machining process of the selected hard material like EN31 steel tool, by using a novel TiN coated carbide tool, material removal removal rate has been maximized when compared to the uncoated tool during CNC turning operation. [ABSTRACT FROM AUTHOR]