Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Characteristics of Delamination Factor and Surface Roughness by Drilling Condition for Glass Fiber Reinforced Plastic Composites

유리섬유복합재의 드릴가공조건에 대한 박리지수와 표면조도 특성

  • 이옥규 (한국폴리텍대학 달성캠퍼스 자동화시스템학과) ;
  • 안대건 (경상대학교 항공기부품기술연구소) ;
  • 최진호 (경상대학교 기계공학부 항공기부품기술연구소) ;
  • 권진회 (경상대학교 항공우주시스템공학과 항공기부품기술연구소)
  • Received : 2013.10.31
  • Accepted : 2013.12.02
  • Published : 2013.12.31
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Abstract

Characteristics of delamination factor and surface roughness by drilling condition for glass fiber reinforced plastic (GFRP) composites were investigated in this paper. An expression to quantify the delamination factor was induced by using image pixels of the entry and the experimental drilling was accomplished by fabricating several GFRP specimens in condition of minimizing the effect of vibration and heat. A method for measuring 6 points average surface roughness was applied to acquire the more reliable roughness values. The experimental results showed that the delamination factor was decreased as the feed rate was increased and it was also slightly decreased as the cutting speed was increased. Also, it was investigated that the surface roughness at inner surface of drilled holes was increased as the feed rate was increased, whereas the roughness values were not affected by the cutting speed variation.

본 논문에서는 유리섬유복합재(glass fiber reinforced plastic composites)의 드릴가공조건변화에 따른 박리지수와 표면조도 특성이 분석되었다. 드릴 가공된 홀의 입출구에서 이미지 픽셀을 이용하여 박리지수를 산출할 수 있는 관계식이 유도되었으며, 복합재 시편을 제작하여 진동 및 열 영향을 최소화할 수 있는 가공조건에서 드릴가공을 수행하여 보다 신뢰성 있게 표면조도값을 얻기 위하여 6점평균표면조도측정 방식이 적용되었다. 실험 결과로부터 GFRP 드릴가공에서 박리지수는 이송속도 증가에 감소하고, 절삭속도 증가에도 미세하게 감소함을 볼 수 있었다. 또한 드릴가공된 홀 내부에서 표면조도는 이송속도가 증가할수록 증가하고, 절삭속도 변화에는 영향을 받지 않음이 파악되었다.

Keywords

References

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