Experimental measurements of temperatures in ultrasonically assisted drilling of cortical bone

Figures & data

Figure 1. Experimental setup for temperature measurements in bone drilling: (a) UAD system, (b) thermocouple measurements.

Table 1. Parameters used in temperature measurements in drilling.

Parameters	Values
Drilling speed (rpm)	1000–3000
Drill diameter (mm)	4
Angle of drill's cutting edge (deg)	65
Feed rate (mm/min)	10–50
Vibration amplitude (µm)	5–25
Vibration frequency (kHz)	5–30

Figure 2. Temperature evolution in bone during the drilling operation.

Note: Drill speed = 2000 rpm, feed rate = 30 mm/min, frequency = 15 kHz, amplitude = 10 µm.

Figure 3. Evolution of force in CD and UAD measured with a dynamometer.[7]

Note: Drilling speed = 1800 rpm, frequency = 30 kHz (I – drill engagement stage, II – drilling, III – drill exit).

Figure 4. Effect of drilling speed on maximum bone temperature in UAD.

Note: Feed rate = 30 mm/min, frequency = 15 kHz, amplitude = 10 µm.

Figure 5. Effect of feed rate on maximum bone temperature in UAD.

Note: Drill speed = 2000 rpm, frequency = 15 kHz, amplitude = 10 µm.

Figure 6. Variation of maximum bone temperatures with vibration frequency in UAD.

Note: Drill speed = 2000 rpm, feed rate = 30 mm/min, amplitude = 10 µm.

Figure 7. Variation of maximum bone temperatures with vibration amplitude in UAD.

Note: Drill speed = 2000, feed rate = 30 mm/min, frequency = 15 kHz.

Alam K, Mitrofanov AV, Silberschmidt VV. Experimental investigations of forces and torque in conventional and ultrasonically assisted drilling of cortical bone. Med Eng Phys. 2011;33:234–239.

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