한국생산제조학회 학술지 영문 홈페이지
[ Article ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 27, No. 2, pp.132-139
ISSN: 2508-5107 (Online)
Print publication date 15 Apr 2018
Received 04 Mar 2018 Accepted 10 Apr 2018
DOI: https://doi.org/10.7735/ksmte.2018.27.2.132

주축 선회형 5축 가공기에서 가속도 센서를 이용한 채터 감지

신재훈a ; 윤재웅b, *
Chatter Monitoring in Head-Tilting 5-axis Machining Centers using an Accelerometer Signal
Jae-Hoon Shina ; Jae-Woong Younb, *
aDepartment of Mechanical Engineering, Graduate School of Daegu University, 201, Daegudae-ro, Gyeongsan, Gyeongbuk-do, 38453, Korea
bDivision of Mechanical Engineering, Daegu University, 201, Daegudae-ro, Gyeongsan, Gyeongbuk-do, 38453, Korea

Correspondence to: *Tel.: +82-53-850-6684, Fax: +82-53-850-6689, E-mail address: jwyoun@daegu.ac.kr (Jae-Woong Youn).

Abstract

Chatter is caused by the dynamic instability of a machining system. Chatter causes a variety of economic damages, including reduction of tool life, and damage to the machine tools and workpieces. In this study, we propose a method for detecting chatter in head-tilting 5 - axis machine tools. A sensor attached to a fixed part is considered, located at a remote place from the spindle. This study aimed to detect chatter without any prior knowledge of the involved dynamic system, such as tools, machine tools and workpieces. First, the acceleration signal under various machining conditions was analyzed: no change was observed to interfere with the chatter detection. However, with chatter occurring, beating of the acceleration signal was confirmed by two or more adjacent frequency components, which could be the basis of a very good chatter detection approach. Finally, using this concept, a mode diagram was proposed for chatter detection.

Keywords:

Chatter, Monitoring, Accelerometer, 5-Axis milling, Head-tilting

Acknowledgments

이 논문은 2015학년도 대구대학교 학술연구비 지원에 의한 논문임.

References

  • Zhang, X., Yu, T., Wang, W., 2016, Chatter Stability of Micro end Milling by Considering Process, Nonlinearities and Process Damping, Int. J. Adv. Manuf. Technol., 87 2785-2796. [https://doi.org/10.1007/s00170-016-8658-5]
  • Kim, Y. K., Yoon, M. C., Ha, M. K., Sim, S. B., 2002, A Study on the Behaviors of Chatter in Milling Operation, Journal of the Korean Society of Manufacturing Technology, 1:1 123-132.
  • Jo, M. H., Kim, J. Y., Lee, J. H., Kim, J. S., 2014, Signal Acquisition for Effective Prediction of Chatter Vibration in, Milling processes, Journal of the Korean Society of Manufacturing Technology Engineers 23:4 325-329.
  • Jeong, N. S,. Yang, M. Y., 2009 Analytical Prediction of Chatter Vibration in Milling Process, Journal of the Korean Society of Mechanical Engineers, 33:3 210-217.
  • Yoon, M. C., Chin, D. H., 2006, Time Series Modeling and Spectrum Analysis for Chatter Mode in Endmilling Dynamics, Int. J. Adv. Manuf. Technol., 29 1125-1133. [https://doi.org/10.1007/s00170-005-0018-9]
  • Shi, Y., Mahr, F., Wagner, U., Uhlmann, E., 2012, Chatter Frequencies of Micromilling Processes: Influencing Factors and Online Detection Via Piezoactuators, International Jornal of Machine Tools & Manufacture, 56 10-16. [https://doi.org/10.1016/j.ijmachtools.2011.12.001]
  • Youn, J. W., 2000, A Study on the Detection Chatter Vibration Using Cutting Force Measurement, Journal of the Korean Society of Machine Tool Engineers, 9:3 150-159.
  • Kim, M. K., 2001, Diagnosis of Chatter Vibration Using Frequency Domain in a Milling Process, Transactions of the Korean Society of Machine Tool Engineers, 10:3 12-18.
  • Seo, J. W., Park, H. W., 2015, Prediction of the Chatter During the Milling Process of the Machine Tool, J. Korean Soc. Precis. Eng., 32:5 441-446.
  • Park, J. H., 1999, A study on the Prediction of Chatter Stability in Milling Process Using Frequency Response Function, Master’s Dissertation, Kum-oh National Institute of Technology, Republic of Korea.