한국공작기계학회논문집 (Transactions of the Korean Society of Machine Tool Engineers)

한국생산제조학회 (The Korean Society of Manufacturing Technology Engineers)
권호 표지

$Si^3 N_4$ 구조용세라믹재의 연삭가공시 숫돌마멸에 따른 가공특성

Machining Characteristics According to the Wheel Wear in Surface Grinding for Structural Ceramics of $Si^3 N_4$

  • 왕덕현 (경남대학교 기계자동화공학부) ;
  • 김원일 (경남대학교 기계자동화공학부) ;
  • 신경오 (경남대학교 대학원 기계공학과)
  • 발행 : 2003.08.01
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초록

In this study, the decision of dressing time for diamond wheel was analyzed by observing with acoustic emission signals and surface roughness, and also obtained the machining characteristics by weibull distribution plot for the values of bending strength. From the experimental study, it was possible to predict the time of re-dressing for the diamond grinding wheel with the analysis of acoustic emission signals and surface roughness values, and following conclusions were obtained. The root-mem-square values of acoustic emission signals were obtained low as the increased of table speed for different abrasive grain size. This is caused by the lack of grinding power which is not able to get rid of all real grinding mass of depth as the table speed is increased. The values of bending strength for ground $Si_3 N_4$ specimens were decreased for gain size of #400 than that of #60, but it was found that the surface roughness values for gain size of #60 were better than that of #400. As compared the shape parameter of weibull distribution plot for the values of bending strength, it was found that the reliability of bending strength for grain size of #60 increased than that of #400.

키워드

참고문헌

  1. Trans. of ASME v.116 On the Possibility of Process Monitring in Grinding by Spark Intensity Measurements Rajmohan,B.;Radhakarishan,V.
  2. Trans. of ASME v.106 An Investigation of Grinding and Wheel Loading Using Acoustic Emission Dormfeld,D.;Cai,H.G.
  3. Annals of CIRP v.34 no.1 Monitoring of Dressing and Grinding Processing with Acoustic Emission Signals Inasaki,I.
  4. Annals of CIRP v.22 no.1 Exploratory Investigation of Laser Methods for Grinding Research Murray,M.
  5. Annals of CIRP v.42 no.1 In-Process Mesurements of Progressive Variation of Grinding Characteristecs in Constant-Load Heavy Grinding Matsuo,T.;Tonge,M.;Iwasaki,K.
  6. Trans. of KSMTE v.11 no.3 A Study on the Grinding Characteristics of Ceramics Kim,S.C.;Jeong,E.S.;Kim,T.B.;K.Lee,S.E.;So,Y.