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논문 기본 정보

자료유형
학술대회자료
저자정보
박상일 (중앙대학교) 조민행 (중앙대학교)
저널정보
대한기계학회 대한기계학회 춘추학술대회 대한기계학회 2010년도 추계학술대회 강연 및 논문 초록집
발행연도
2010.11
수록면
199 - 204 (6page)

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Surface texturing has been a well known approach for the reduction of friction and wear of mechanical component in contact under lubricated sliding. Recently, laser surface texturing has become a promising technology used for fabricating micro-holes and channels on metallic material surfaces. During laser texturing process, however, thermal damages are observed, and they should be minimized, especially when machining polymeric materials. In this paper, a newly introduced CNC machining was used to make an array of microholes on polyoxymethylene(POM) surface. To investigate the effect of the ratio of diameter and depth of a hole on friction under lubricated environment, samples with the diameter of 100㎛ and the ratio varying from 0.2 to 2 were prepared by CNC machining. Friction tests were performed using pin-on-disk apparatus against 100Cr6 steel disks for about 3 hrs. The nominal pressure was 1.35 ㎫ and the sliding speed was 0.1 ㎧. The test results indicated that the lower coefficient of friction was obtained from the ratio of 0.5. Compared to the non-textured surface, the coefficient of friction was about a half of one from the non-textured sample. In the case of ratio 2, however, the effect of surface texturing disappeared, and it is attributed to the hindrance of lubricant supply. Examination of wear track showed that deep holes are not effective in lowering friction of the sample because no lubricant was observed both in and around the holes. The morphological features of sliding surface were examined by scanning electron microscopy and optical microscopy in order to correlate friction characteristics and the deformation of POM sliding surface.

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Abstract
1. 서론
2. 실험
3. 실험 결과 및 고찰
4. 결론
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UCI(KEPA) : I410-ECN-0101-2012-550-003936481