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Modeling and performance analysis of rock drill drifters for rock stiffness

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International Journal of Precision Engineering and Manufacturing Aims and scope Submit manuscript

Abstract

Rock drill operations are classified as top hammer drilling (THD), down-the-hole drilling, or rotary drilling. The rock drill in the THD method consists of a percussion drill rig module and a drill bit. The percussion drill rig module consists of a drifter, feed drive, and auto rod changer. In particular, the drifter generates the impact and rotational force for drilling. The purpose of this study was to analyze the hydraulic circuits of the drifter and to develop an analysis tool for analyzing the impact capability. This study also analyzed the capability of the drifter with regard to the penetration rate and varying kinetic energy, which is dependent on rock stiffness, using the developed analysis tool.

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Abbreviations

A PS :

area of impact piston in supply port

A P4 :

area of impact piston in forth chamber

A V3 :

area of shuttle valve in third chamber

A VSb :

area of shuttle valve in chamber (V Sb )

A Da :

area of damping piston in first damping chamber

A Db :

area of damping piston in second damping chamber

β :

bulk Modulus of the fluid

c :

manufacturing error

c P :

friction coefficient of impact piston

c V :

friction coefficient of shuttle valve

c D :

friction coefficient of damping piston

e :

eccentricity of spool

F load :

load force

F r :

recoiling force

m P :

mass of impact piston

m V :

mass of shuttle valve

m D :

mass of damping piston

P P4 :

pressure of impact piston in forth chamber

P PS :

pressure of impact piston in supply port

P V3 :

pressure of shuttle valve in third chamber

P VS :

pressure of shuttle valve in supply port

Q PS :

flow rate from supply port to impact piston

Q VSa :

flow rate from supply port to shuttle valve

Q Da :

flow rate from supply port to damping piston

x D :

displacement of damping piston

x P :

displacement of impact piston

x V :

displacement of shuttle valve

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Author information

Authors and Affiliations

  1. Department of Mechanical Design & Mechatronics Engineering, Hanyang University, 17, Haengdang-dong, Seongdong-gu, Seoul, South Korea, 133-791

    Joo-Young Oh

  2. System Engineering Research Division, Korea Institute of Machinery and Materials, 104, Singseongno, Yuseong-gu, Daejeon, South Korea, 305-343

    Geun-Ho Lee

  3. R&D Institute, Junjin CSM, San3-1, Ssangyoug-Ri, Eumbong-Myeon, Asan-Si, Chungnam, 336-865, South Korea

    Hak-Soon Kang

  4. Department of Mechanical Engineering, Hanyang University, 17, Haengdang-dong, Seongdong-gu, Seoul, South Korea, 133-791

    Chang-Seop Song

Authors
  1. Joo-Young Oh
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  2. Geun-Ho Lee
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  3. Hak-Soon Kang
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  4. Chang-Seop Song
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Correspondence to Joo-Young Oh.

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Oh, JY., Lee, GH., Kang, HS. et al. Modeling and performance analysis of rock drill drifters for rock stiffness. Int. J. Precis. Eng. Manuf. 13, 2187–2193 (2012). https://doi.org/10.1007/s12541-012-0290-1

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  • DOI: https://doi.org/10.1007/s12541-012-0290-1

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