한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제26권5호
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  • Pages.48-56
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  • 2009
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

질화규소의 Laser-Assisted Machining 공정에 관한 연구

A Study on Laser-Assisted Machining Process of Silicon Nitride

  • 임세환 (한국기계연구원 지능형생산시스템연구본부) ;
  • 이제훈 (한국기계연구원 지능형생산시스템연구본부) ;
  • 신동식 (한국기계연구원 지능형생산시스템연구본부) ;
  • 김종도 (한국해양대학교 기관시스템공학부) ;
  • 김주현 (국민대학교 기계자동차공학부)
  • Lim, Se-Hwan (Intelligent Manufacturing Systems Research Division, KIMM) ;
  • Lee, Jae-Hoon (Intelligent Manufacturing Systems Research Division, KIMM) ;
  • Shin, Dong-Sig (Intelligent Manufacturing Systems Research Division, KIMM) ;
  • Kim, Jong-Do (Division of Marine System Engineering, Korea Maritime University) ;
  • Kim, Joo-Hyun (School of Mechanical and Automotive Engineering, Kookmin University)
  • 발행 : 2009.05.01
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초록

In this paper, laser-assisted machining(LAM) has been employed to machine hot isostatically pressed (HIPed) Si3N4 work pieces. Due to little residual flaws and porosity, HIPed $Si_3N_4$ work pieces are more difficult to machine compared to normally sintered $Si_3N_4$ workpieces. In LAM, the intense energy of laser was used to enhance machinability by locally heating the workpiece and thus reducing yield strength. In experiments, the laser power ranges from 200W to 800W and the diameter of work pieces is 16mm. While machining, the surface temperature was kept nearly constant by laser heating except for a short period of rise time of max. 58 seconds. Results showed as feed rate increases the surface temperature of $Si_3N_4$ workpieces decreases slightly, whereas the effect of depth of cut is disregardable. With a laser power of 800W, achievable maximal depth of cut as 0.7mm and feed rate was 0.03mm/rev.

키워드

참고문헌

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