Design and testing of coring bits on drilling lunar rock simulant

Coring bits are widely utilized in the sampling of celestial bodies, and their drilling behaviors directly affect the sampling results and drilling security. This paper introduces a lunar regolith coring bit (LRCB), which is a key component of sampling tools for lunar rock breaking during the lunar soil sampling process. We establish the interaction model between the drill bit and rock at a small cutting depth, and the two main influential parameters (forward and outward rake angles) of LRCB on drilling loads are determined. We perform the parameter screening task of LRCB with the aim to minimize the weight on bit (WOB). We verify the drilling load performances of LRCB after optimization, and the higher penetrations per revolution (PPR) are, the larger drilling loads we gained. Besides, we perform lunar soil drilling simulations to estimate the efficiency on chip conveying and sample coring of LRCB. The results of the simulation and test are basically consistent on coring efficiency, and the chip removal efficiency of LRCB is slightly lower than HIT-H bit from simulation. This work proposes a method for the design of coring bits in subsequent extraterrestrial explorations.

[1]  Ye Tian.  Structure Parameters Optimization and Simulation Experiment of Auger in Lunar Soil Drill-sampling Device , 2012 .

[2]  Zongquan Deng,et al.  Development of a drilling and coring test-bed for lunar subsurface exploration and preliminary experiments , 2014 .

[3]  Yang Gao,et al.  Analysis of drill head designs for dual-reciprocating drilling technique in planetary regoliths , 2015 .

[4]  Hirokazu Karasawa,et al.  Experimental results on the effect of Bit wear on torque response , 2016 .

[5]  Eric Kulczycki,et al.  Results from Testing of Two Rotary Percussive Drilling Systems , 2010 .

[6]  Zongquan Deng,et al.  Vibratory compaction method for preparing lunar regolith drilling simulant , 2016 .

[7]  Aiguo Song,et al.  A novel rigid–flexible link combined lunar sampler and its basic dynamics and control , 2014 .

[8]  K. Ehmann,et al.  Issues in polycrystalline diamond compact cutter-rock interaction from a metal machining point of view-part I: Temperature, stresses, and forces , 2012 .

[9]  Hanmin Shi.  Chip-ejection interference in cutting processes of modern cutting tools , 1999 .

[10]  Zongquan Deng,et al.  Drilling power consumption and soil conveying volume performances of lunar sampling auger , 2015 .

[11]  Demeng Che,et al.  Issues in Polycrystalline Diamond Compact Cutter–Rock Interaction From a Metal Machining Point of View—Part II: Bit Performance and Rock Cutting Mechanics , 2012 .

[12]  Judith Haley Allton,et al.  Catalog of Apollo lunar surface geological sampling tools and containers , 1989 .

[13]  Zongquan Deng,et al.  Development of a drilling and coring test-bed for lunar subsurface exploration and preliminary experiments , 2013, Chinese Journal of Mechanical Engineering.

[14]  Murat Karakus,et al.  Acoustic emission analysis for rock–bit interactions in impregnated diamond core drilling , 2014 .

[15]  M. Badescu,et al.  Development and testing of a rotary percussive Sample Acquisition Tool , 2012, 2012 IEEE Aerospace Conference.

[16]  Discrete particle simulations of solids compaction and conveying in a single‐screw extruder , 2008 .

[17]  Kris Zacny,et al.  Prototype rotary percussive drill for the Mars Sample Return mission , 2011, 2011 Aerospace Conference.

[18]  Paul Backes,et al.  Estimation and control for autonomous coring from a rover manipulator , 2010, 2010 IEEE Aerospace Conference.

[19]  Duan Longchen,et al.  Study on Auger Drilling Technology for Sampling Drilling in the Lunar Stimulants , 2014 .

[20]  Yoseph Bar-Cohen,et al.  Drilling in Extreme Environments , 2009 .

[21]  Aiguo Song,et al.  A novel rigid–flexible combined sampler for lunar exploration , 2014 .

[22]  George L. Siscoe,et al.  Lunar Science: A Post‐Apollo View , 1976 .

[23]  Zongquan Deng,et al.  Soil chip convey of lunar subsurface auger drill , 2016 .

[24]  Emmanuel M Detournay,et al.  Drilling response of drag bits: Theory and experiment , 2008 .

[25]  A. El-Khayatt,et al.  Analysis of some lunar soil and rocks samples in terms of photon interaction and photon energy absorption , 2015 .

[26]  Deng Zong-qua.  Research on New Structure Coring Bit for Extraterrestrial Bodies Exploration , 2013 .

[27]  Emmanuel M Detournay,et al.  Bit/rock interface laws in directional drilling , 2012 .

[28]  Jeoung Seok Yoon,et al.  Application of experimental design and optimization to PFC model calibration in uniaxial compression simulation , 2007 .

[29]  J. Flahaut,et al.  A multiple-rendezvous, sample-return mission to two near-Earth asteroids , 2011 .

[30]  Tao Lu,et al.  Non-Free Cutting and Its Degree of Freedom Confinement , 1999 .

[31]  Richard Mattingly,et al.  Mars Sample Return as a campaign , 2011, 2011 Aerospace Conference.

[32]  V. L. Barsukov.  Preliminary data for the regolith core brought to earth by the automatic lunar station Luna 24. , 1977 .