[ 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

신재훈^a ; 윤재웅^b^{, *}

Chatter Monitoring in Head-Tilting 5-axis Machining Centers using an Accelerometer Signal

Jae-Hoon Shin^a ; Jae-Woong Youn^b^{, *}

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.

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