Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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A experimental study on the loads and temperature acting on the shaft of a disc cutter during linear rock cutting test

선형절삭실험 중 디스크커터 축에 작용하는 하중과 온도에 대한 실험적 연구

  • Choi, Soon-Wook (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Chang, Soo-Ho (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Park, Young-Taek (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Lee, Gyu-Phil (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Bae, Gyu-Jin (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
  • 최순욱 (한국건설기술연구원 SOC성능연구소 Geo-인프라연구실) ;
  • 장수호 (한국건설기술연구원 SOC성능연구소 Geo-인프라연구실) ;
  • 박영택 (한국건설기술연구원 SOC성능연구소 Geo-인프라연구실) ;
  • 이규필 (한국건설기술연구원 SOC성능연구소 Geo-인프라연구실) ;
  • 배규진 (한국건설기술연구원 SOC성능연구소 Geo-인프라연구실)
  • Received : 2013.04.16
  • Accepted : 2013.05.08
  • Published : 2013.05.31
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Abstract

This study aimed to estimate the axial stress and torque on a shaft in a disc cutter. The corresponding inner temperature and the surface temperature of a cutter ring were also measured by using strain gauges and thermocouples during the linear cutting tests. The maximum values of the axial stress and torque were recorded to 11.3 MPa, $171kN{\cdot}m$ respectively. They have higher correlations with normal force rather than rolling force. The results of temperature measured by thermocouples during a linear cutting test showed that the rate of increase in temperature was below $0.2^{\circ}C$. When the cutter spacing is set to be 70 mm, the inner temperature and surface temperature of a disc cutter were $0.1^{\circ}C/m$, $0.15{\sim}0.17^{\circ}C/m$ respectively. Similarly, when the cutter spacing is 90 mm, the temperature values were $0.09^{\circ}C/m$, $0.13{\sim}0.23^{\circ}C/m$ respectively.

본 연구는 변형률게이지와 열전대, 적외선 열화상카메라를 사용하여 선형절삭실험 동안 디스크커터의 축에 발생하는 축응력과 토크를 측정하고 디스크커터의 내부와 외부의 온도를 파악하고자 하였다. 실험결과, 축응력과 토크의 최대값은 각각 11.3 MPa, $171kN{\cdot}m$로 측정되었으며, 축응력과 토크는 회전력보다는 디스크커터의 연직력과 상관성이 높은 것으로 나타났다. 선형절삭실험 동안 열전대로 측정한 결과, 디스크커터의 온도변화는 $0.2^{\circ}C$ 이내로 나타났다. 그러나 수행된 각 선형절삭작업이 연속적으로 이루어진다고 가정한 다음, 디스크커터의 내부온도와 커터 링 표면의 온도변화를 추정한 결과, 커터간격이 70 mm인 경우에는 각각 $0.1^{\circ}C/m$, $0.15{\sim}0.17^{\circ}C/m$로 예상되었고 커터간격이 90 mm인 경우에는 각각 $0.09^{\circ}C/m$, $0.13{\sim}0.23^{\circ}C/m$로 추정되었다.

Keywords

References

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