Effects of Focus Geometry on the Hard Rock-Cutting Performance of an Abrasive Waterjet

Table 1

Experimental study cases and details.

Water pressure (MPa)	320
Standoff distance (mm)	10
Traverse speed (mm/s)	8.4
	Effects of water and abrasive flow rates
Orifice diameter (mm)	0.15	0.254	0.33
Water flow rate (mL/s)	10.67	29.50	50.00
Abrasive flow rate (g/s)	3.3–14.2	4.0–24.0	4.4–29.0
	Effect of focus diameter (focus length 76.2 mm)
Focus diameter (mm)	0.76	0.76	0.76
	—	0.91	0.91
	1.02	1.02	1.02
	Effect of focus length (focus diameter 1.02 mm)
Focus length (mm)	76.2	76.2	76.2
	101.6	101.6	101.6
	152.4	152.4	152.4