CFRP 마이크로 드릴가공에서 다중신호를 이용한 드릴 상태감시

The machinability of carbon fiber reinforced plastic (CFRP) is very poor because of its properties that make it difficult-to-machine, and machining trouble is often observed during microdrilling owing to easy drill wear and fracture. Therefore, it is important to effectively monitor the drill tool s...

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Bibliographic Details
Published in한국생산제조학회지 Vol. 27; no. 5; pp. 401 - 408
Main Authors 이두희(Doo-Hee Lee), 윤지찬(Ji-Chan Yoon), 이종환(Jong-Hwan Lee), 김정석(Jeong-Suk Kim)
Format Journal Article
LanguageKorean
Published 한국생산제조학회 01.10.2018
Subjects
기계공학
Carbon fiber reinforced plastic
Micro drilling
Tool wear propagation
Threshold level
Cutting force
Acoustic emission (AE)
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Summary:The machinability of carbon fiber reinforced plastic (CFRP) is very poor because of its properties that make it difficult-to-machine, and machining trouble is often observed during microdrilling owing to easy drill wear and fracture. Therefore, it is important to effectively monitor the drill tool state in microdrilling operations. Cutting force and acoustic emission (AE) signals are often used to monitor tool states during limited cutting conditions. Using the cutting force and AE signals simultaneously is suggested in this investigation to increase the effectiveness of monitoring tool states in microdrilling. The relationship between tool wear propagation and these signal characteristics are verified for various feed rates, and a good correlation is obtained from the signal processing results in the frequency domain. The power threshold level of simultaneous cutting force and AE signals in the frequency domain can be adopted to monitor microdrilling states of CFRP drilling. KCI Citation Count: 0
ISSN:2508-5093
2508-5107
DOI:10.7735/ksmte.2018.27.5.401