Penelitian ini bertujuan untuk menganalisis pengaruh Nose radius, cutting speed, danrnFeed rate terhadap material removal rate (MRR), kekasaran permukaan, dan kesilindrisanrnporos baja S45C pada proses CNC turning, serta menentukan kombinasi parameterrnpemesinan yang optimal menggunakan metode Taguchi dan Grey Relational Analysisrn(GRA). Variabel bebas yang digunakan meliputi Nose radius sebesar 0,4 mm, 0,8 mm, danrn1,2 mm; cutting speed sebesar 50 m/menit, 60 m/menit, dan 70 m/menit; serta Feed raternsebesar 0,10 mm/rev, 0,15 mm/rev, dan 0,20 mm/rev. Rancangan percobaan disusunrnmenggunakan metode Taguchi dengan orthogonal array L9, sedangkan analisis datarndilakukan menggunakan rasio Signal-to-Noise (S/N), Analysis of Variance (ANOVA), danrnGrey Relational Analysis (GRA).rnHasil penelitian menunjukkan bahwa variasi Nose radius, cutting speed, dan Feed raternmemberikan pengaruh terhadap nilai MRR, kekasaran permukaan, dan kesilindrisan poros.rnParameter optimum untuk menghasilkan MRR tertinggi diperoleh pada Nose radius 0,8 mm,rncutting speed 70 m/menit, dan Feed rate 0,20 mm/rev. Sedangkan parameter optimum untukrnmenghasilkan kekasaran permukaan terendah serta penyimpangan kesilindrisan paling kecilrndiperoleh pada Nose radius 1.2 mm, cutting speed 70 m/menit, dan Feed rate 0,10 mm/rev.rnHasil optimasi multirespons menggunakan metode GRA menunjukkan bahwa kombinasirnparameter terbaik diperoleh pada Nose radius 0.8 mm, cutting speed 70 m/menit, dan Feedrnrate 0,10 mm/rev. Hasil penelitian ini membuktikan bahwa metode Taguchi dan GRA efektifrndigunakan dalam menentukan parameter pemesinan yang mampu menghasilkanrnkeseimbangan antara produktivitas dan kualitas hasil pemesinan pada proses CNC turningrnbaja S45C.


Deskripsi Lain

This study aims to analyze the effect of Nose radius, cutting speed, and Feed rate onrnmaterial removal rate (MRR), surface roughness, and cylindricity of S45C steel shafts in thernCNC turning process, well to determine the optimal combination of machiningrnparameters using the Taguchi method and Grey Relational Analysis (GRA). The independentrnvariables used were Nose radius of 0.4 mm, 0.8 mm, and 1.2 mm; cutting speed of 50 m/min,rn60 m/min, and 70 m/min; and Feed rate of 0.10 mm/rev, 0.15 mm/rev, and 0.20 mm/rev. Thernexperimental design was arranged using the Taguchi method with an L9 orthogonal array,rnwhile data analysis was performed using the Signal-to-Noise (S/N) ratio, Analysis ofrnVariance (ANOVA), and Grey Relational Analysis (GRA).rnThe results showed that variations in Nose radius, cutting speed, and Feed raterninfluenced the values of MRR, surface roughness, and shaft cylindricity. The optimumrnparameters for producing the highest MRR were obtained at a Nose radius of 0.8 mm, cuttingrnspeed of 70 m/min, and Feed rate of 0.20 mm/rev. Meanwhile, the optimum parameters forrnproducing the lowest surface roughness and the smallest cylindricity deviation werernobtained at a Nose radius of 1.2 mm, cutting speed of 70 m/min, and Feed rate of 0.10rnmm/rev. The multi-response optimization results using the GRA method showed that the bestrnparameter combination was obtained at a Nose radius of 0.8 mm, cutting speed of 70 m/min,rnand Feed rate of 0.10 mm/rev. These findings demonstrate that the Taguchi method and GRArnare effective in determining machining parameters that achieve a balance betweenrnproductivity and machining quality in the CNC turning process of S45C steel.