Analysis and Testing of Load Characteristics for Rotary-Percussive Drilling of Lunar Rock Simulant with a Lunar Regolith Coring Bit

Table 1

LRCB configuration parameters.

Parameter		Symbol	Value
Bit matrix parameters	Borehole diameter		32 mm
	Coring diameter		14.5 mm
	Short axial length of spiral ellipsoid		15.8 mm
	Number of bit spirals		3
Cutting blade position parameters	Cutting blade height difference		1 mm
	Cutting blade angle difference		93.08°
Cutting blade configuration parameters	Forward rake angle		Row I: 0°
			Row II: 0°
	Outward rake angle		Row I: 25°
			Row II: 25°
	Sharp-point position coefficient		Row I: 0.5
			Row II: 0.3
	Sharp-point height		Row I: 2 mm
			Row II: 2 mm
	Sharp blade width		Row I: 4 mm
			Row II: 5.33 mm