한국기계가공학회지 (Journal of the Korean Society of Manufacturing Process Engineers)

  • 제9권5호
  • /
  • Pages.1-6
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  • 2010
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  • 1598-6721(pISSN)
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  • 2288-0771(eISSN)
한국기계가공학회 (The Korean Society of Manufacturing Process Engineers)
권호 표지

초경합금의 미세방전 드릴링에 관한 연구

A Study on Micro ED-Drilling of cemented carbide

  • 투고 : 2009.12.23
  • 심사 : 2010.04.08
  • 발행 : 2010.10.30
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초록

The wavelet transform is a popular tool for studying intermittent and localized phenomena in signals. In this study the wavelet transform of cutting force signals was conducted for the detection of a tool failure in turning process. We used the Daubechies wavelet analyzing function to detect a sudden change in cutting signal level. A preliminary stepped workpiece which had intentionally a hard condition was cut by the inserted cermet tool and a tool dynamometer obtained cutting force signals. From the results of the wavelet transform, the obtained signals were divided into approximation terms and detailed terms. At tool failure, the approximation signals were suddenly increased and the detailed signals were extremely oscillated just before tool failure.

키워드

참고문헌

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