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한국생산제조학회 학술지 영문 홈페이지
[ Technical Papers ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 27, No. 6, pp.591-599
ISSN: 2508-5093 (Print) 2508-5107 (Online)
Print publication date 15 Dec 2018
Received 17 Aug 2018 Revised 15 Oct 2018 Accepted 22 Oct 2018
DOI: https://doi.org/10.7735/ksmte.2018.27.6.591

대형 공작기계용 스핀들-베어링 시스템의 동적 특성 및 피로수명에 관한 연구

오현일a ; 권선웅a ; 박우상b ; 홍성욱a, *
Study on the Dynamic Characteristics and Fatigue Life of a Spindle-Bearing System for Large Machine Tools
Hyeon-Il Oha ; Sun-Woong Kwona ; Woo-Sang Parkb ; Seong-Wook Honga, *
aDepartment of Mechanical System Engineering, Kumoh National Institute of Technology, 61 Daehak-ro (Yangho-dong), Gumi, Gyeongbuk-do, 39177, Korea
bKiheung Machinery Co., Ltd., 11 Munpyeongseo-ro 17beon-gil, Daedeok-gu, Daejeon 34303, Korea

Correspondence to: *Tel.: +82-54-478-7344 Fax: +82-54-478-7319 E-mail address: swhong@kumoh.ac.kr (Seong-Wook Hong).

Abstract

The spindle-bearing system is one of the main components that determine the overall performance of machine tools. It is important to accurately predict the characteristics of a spindle-bearing system because the dynamic characteristics of the spindle-bearing system has a significant effect on the performance of the machine tool. In this paper, the dynamic characteristics of a large spindle system supported by angular contact ball bearing (ACBB) considering rotational speed and cutting load were studied. To this end, the equilibrium equations of the spindle system were derived and repeatedly solved to overcome the statistically indeterminate characteristics. Important characteristics of spindle-bearing system such as bearing stiffnesses, bearing fatigue life and spindle natural frequency were estimated with varying the rotating speed and the radial cutting load. The characteristics with regard to several parameters affecting bearing fatigue life were investigated.

Keywords:

Spindle-bearing system, Angular contact ball bearing, Bearing stiffness, Natural frequency, Fatigue life

Acknowledgments

본 논문은 한국산업기술진흥원이 지원하는 경제협력권 산업육성 사업 중 기흥기계㈜ 총괄로 수행한 ‘주축헤드 자동교환장치를 부착한 150톤 이상의 대형 복합가공기 개발’ 과제 연구결과의 일부입니다.

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