Open Access
Table 1
Factor levels of process parameters.
Parameters | Lower axial point (−α) | Lower cubic point (−1) | Centre point (0) | Upper centre point (+1) | Upper axial point (α) |
---|---|---|---|---|---|
Rotational speed | 900 | 1150 | 1500 | 1850 | 2100 |
Transverse speed | 30 | 45 | 60 | 75 | 90 |
Tool tilt angle | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 |
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