Research Article
Analysis and Optimization of Cutting Tool Coating Effects on Surface Roughness and Cutting Forces on Turning of AA 6061 Alloy
Table 6
Results of ANOVA for Ra and Fc.
| | Variance | Degree of freedom (DoF) | Sum of squares (SS) | Mean square (MS) | F ratio | P ratio | Contribution rate (%) |
| | Ra | | Ct | 1 | 6.5679 | 6.56790 | 41.00 | 0.000 | 27.18 | | Vc | 2 | 0.0035 | 0.00174 | 0.01 | 0.989 | 0.014 | | f | 2 | 15.5312 | 7.76562 | 48.48 | 0.000 | 64.28 | | a | 2 | 0.4570 | 0.22849 | 1.43 | 0.285 | 1.89 | | Error | 10 | 1.6019 | 0.16019 | — | — | 6.62 | | Total | 17 | 24.1615 | | | | 100 |
| | Fc | | Ct | 1 | 5532.5 | 5532.5 | 42.18 | 0.000 | 15.62 | | Vc | 2 | 247.9 | 123.9 | 0.95 | 0.421 | 0.7 | | f | 2 | 19439.3 | 9719.7 | 74.11 | 0.000 | 54.9 | | a | 2 | 8876.2 | 4438.1 | 33.84 | 0.000 | 25.06 | | Error | 10 | 1311.5 | 131.2 | — | — | 3.7 | | Total | 17 | 35407.4 | | | | 100 |
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The bold numbers in the table indicate the most effective parameters.
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