1 Introduction
2 Experimental Work
2.1 Fatigue Tests
Ø = 6.35 mm | Ø = 9.53 mm | |||
---|---|---|---|---|
Axial drilling | Orbital drilling | Axial drilling | Orbital drilling | |
Nspindle (rpm) | 9 000 | 40 000 | 4 000 | 40 000 |
Norb (rpm) | – | 1 500 | – | 1 500 |
Vfa (mm/min) | 900 | 60 | 400 | 60 |
Vc (m/min) | 180 | 610 | 120 | 1 005 |
fa (mm/rev) | 0.1 | 0.0015 | 0.1 | 0.0015 |
Tool | Tungsten carbide drill | 4-tooth tungsten carbide end mill | Step tungsten carbide diamond coated drill | 4-tooth tungsten carbide end mill |