Selection of Appropriate Cutting Parameters to Achive Optimum Surface Roughness with Taguchi

Abstract

In this study, AISI 1040 steel, which has a hardness of 41 HRc which is frequently used in the field of automotive industry, has been turned with a CNC lathe. The test list was made by creating L9 orthogonal array in the cutting speed, cutting depth and feed parameters with Taguchi method. The work pieces are machined on CNC lathes using Ti+Al2O3+TiN coated carbide inserts. The experiments were done with dry conditions without any coolant. According to the results of the experiments, the surface roughness values (Ra) were examined. With this method signal/noise (S/N) ratio is determined and the results of the experiments in the three parameters of the surface roughness of the most significant effect is reached from the results of feed. Finally, Taguchi control experiments were applied. The obtained results show that the Taguchi estimate is about 90% accurate. In the analysis of variance, the confidence level of progress was 95%.

Keywords: AISI 1040, Surface roughness, Turning, Taguchi method

DOI: 10.7176/JSTR/5-3-06