정밀가공용 고속 자동선반 베드의 정하중 및 공진주파수 해석

Analysis on Static Load and Resonance Frequency of Bed in High-speed Automatic Lathe for Precision Machining

  • 하주환 (한국기술교육대학교 메카트로닉스공학부) ;
  • 이윤철 (한국기술교육대학교 메카트로닉스공학부) ;
  • 주강우 (한국기술교육대학교 메카트로닉스공학부) ;
  • 조은정 (한국기술교육대학교 메카트로닉스공학부) ;
  • 이영식 ((주)대성하이텍) ;
  • 이재권 ((주)대성하이텍) ;
  • 김광선 (한국기술교육대학교 메카트로닉스공학부)
  • 투고 : 2017.05.16
  • 심사 : 2017.06.23
  • 발행 : 2017.06.30

초록

This paper is about the analysis on the vibration characteristic of tooling units on the precision bed in high-speed automatic lathe for precision machining. An automatic lathe operating at about 25,000 RPM is a critical factor in the self-weight stress and deformation of the bed. Especially, the resonance frequency should be grasped in advance to prevent abnormal vibration that may occur during processing. If the wrong bed is used, the resonant frequency can have a fatal influence on the precision machining and increase the defective rate of precision machined parts such as semiconductor parts. In this paper, vibration characteristics were evaluated through static load and resonance frequency analysis of automatic lathe bed. As a result, the maximum stress was 0.14MPa, the maximum deformation amount was $17.9{\mu}m$, and the natural frequency was 364.72Hz. The resonance frequency was calculated as 718Hz, and the stability was confirmed by being in the range of 400Hz or more, which is the processing condition.

키워드

참고문헌

  1. Park. C. H., Kim. J. U., Wang. D. H., and Kim. W. I., 2005, "Development of Electrode Guide of Super-drill EDM and Electrical Discharge Machining of Small Hole for High Precision Semiconductor Die", Journal of the KSMPE, Vol. 4, No. 3, pp. 32-38.
  2. Choi. S. G., Kim. S. H., Choi. W. K., Shin. H. J., Lee. E. S., and Kim. K. D., "A Study in the Modal Analysis of Hybrid Vertical Grinding System Bed", Journal of the KSMTE, Vol. 12, No. 5, pp. 50-56, 2013.
  3. 2015, Star-CCM User Guide ver.10.02, CD-adapco.
  4. Ferdinand P. Beer, E. Russell Johnston, Jr., and John T. DeWolf, 2004, "Mechanics of Materials" 3rd Edition, Mcgraw-Hill, pp. 47-56.
  5. J. Douglas Faires and Richard Burden, 2003, "Numerical Methods", 3rd Edition, INTER VISION.
  6. Kang-Woo Joo, Jun-Young Kim, Hee-Rak Beom, and Kwang-Sun Kim, 2011, "Numerical Analysis on Thermal Deformation of Linear Motor in Chip Mounter", Proceedings of the ASME 2011 International Mechanical Engineering Congress & Exposition.