Experimental Examination and Optimization on Quality and Productivity in Turning Operation

Mechanical Engineering

The objective was to find the optimum machining parameters so as to minimize the input of the resources and to maximize the output of the process.The present work concerned an experimental study of turning on nickel-chromium – molybdenum case hardening alloy steel of AISI 4320 grade. The purpose of this thesis is to study the effect of speed, feed, and depth of cut on material removal rate, metal surface and tool wear in machining AISI 4320 alloy steel using tungsten carbide tipped cutting tool. Experiment were conducted on CNC lathe and the influence of cutting parameter was studied via analysis of variance (ANOVA) base on familiar approach. Based on the main effects plots obtain through Taguchi Analysis, a total of 18 tests were carried out, optimum level for MRR, Surface roughness and depth of cut were chosen from the three levels of cutting parameters considered. The choice of each parameter is place at three different levels, namely low, medium and high. Mathematical models were deduce by software design specialist in order to express the influence degree of the main cutting variables such as cutting speed, feed rate and depth of cut on MRR, SR and Flank wear. The results indicate that the cutting speed is the dominant factor affecting all three investigating parameters.

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