Table 9 Confirmation test results.
Composite | Responses | Initial value | Experimental value | Improvement (%) |
|---|---|---|---|---|
Al6061 composite | Drilling time (s) | 3.58 | 3.47 | − 3 |
Entry burr height (mm) | 0.19 | 0.22 | 15.78 | |
Exit burr height (mm) | 1.56 | 1.62 | 3.84 | |
Entry burr thickness (mm) | 0.17 | 0.174 | 2.35 | |
Exit burr thickness (mm) | 0.22 | 0.24 | 9.09 | |
Surface roughness (µm) | 3.289 | 3.388 | 3.01 | |
Al6063 composite | Drilling time (s) | 3.36 | 3.14 | 6.54 |
Entry burr height (mm) | 0.2 | 0.21 | − 5 | |
Exit burr height (mm) | 0.5 | 0.5 | 0 | |
Entry burr thickness (mm) | 0.3 | 0.24 | 20 | |
Exit burr thickness (mm) | 0.34 | 0.35 | − 2.94 | |
Surface roughness (µm) | 5.437 | 5.521 | − 1.54 |
