Table 7 Calculation results of cutting coefficient and drillability index.
P | n = 0.11 rps | n = 0.13 rps | n = 0.15 rps | n = 0.17 rps | n = 0.19 rps | n = 0.21 rps | n = 0.23 rps | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
\(C_{{\text{C}}}\) | DI | \(C_{{\text{C}}}\) | DI | \(C_{{\text{C}}}\) | DI | \(C_{{\text{C}}}\) | DI | \(C_{{\text{C}}}\) | DI | \(C_{{\text{C}}}\) | DI | \(C_{{\text{C}}}\) | DI | |
0.5 | 3.4 | 34.1 | 3.7 | 38.7 | 3.9 | 48.0 | 4.0 | 54.6 | 4.0 | 58.5 | 4.0 | 61.1 | 4.1 | 63.4 |
1.0 | 6.0 | 18.6 | 6.3 | 21.4 | 6.3 | 26.5 | 6.3 | 31.4 | 6.4 | 35.2 | 6.4 | 37.3 | 6.5 | 38.9 |
1.5 | 9.1 | 14.3 | 9.3 | 15.6 | 9.6 | 18.8 | 9.4 | 22.7 | 8.9 | 26.7 | 8.8 | 28.2 | 9.0 | 28.8 |
2.0 | 11.0 | 11.7 | 11.4 | 13.2 | 11.1 | 15.9 | 10.5 | 19.5 | 10.3 | 22.5 | 10.3 | 24.5 | 10.5 | 25.5 |
2.5 | 12.5 | 10.2 | 12.2 | 11.7 | 11.9 | 14.1 | 12.3 | 17.0 | 11.6 | 20.7 | 11.4 | 22.3 | 11.2 | 23.1 |
3.0 | 12.4 | 9.8 | 12.5 | 11.4 | 13.1 | 13.7 | 12.9 | 16.1 | 12.5 | 18.6 | 12.5 | 20.1 | 12.7 | 21.1 |
3.5 | 13.6 | 9.3 | 14.1 | 10.5 | 14.2 | 13.0 | 13.6 | 15.7 | 13.1 | 18.0 | 13.1 | 19.3 | 13.4 | 19.7 |
4.0 | 14.9 | 8.7 | 14.3 | 10.1 | 14.3 | 12.0 | 14.0 | 14.7 | 14.2 | 16.9 | 14.1 | 18.5 | 14.2 | 19.2 |
