Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지

Effects of a drawbar and a rotor in dynamic characteristics of a high-speed spindle

드로우바와 로터가 고속주축계의 동적 특성에 미치는 영향

  • 정원지 (창원대학교 메카트로닉스공학부) ;
  • 이춘만 (창원대학교 메카트로닉스공학부) ;
  • 이정환 (한국기계연구원 소재성형연구센터) ;
  • 임정숙 (한국기계연구원 소재성형연구센터)
  • Published : 2006.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

The spindle system with a built-in motor can be used to simplify the structure of machine tools, to improve the machining flexibility of machine tools, and to perform the high speed machining. For more quantitative analysis of a built-in motor's dynamic characteristics, that of tile mass and stillness effects are considered. And the drawbar in the spindle can be in various condition according to supporting stiffness between drawbar and shaft. Therefore, in this paper following items are performed and analyzed : 1. Modal characteristics of the spindle. 2. Analysis of rotor's mass and stiffness effects. 3. Modal characteristics of the spindle including drawbar, rotor and tool. The results show enough stiff supports must be provided between shaft and drawbar to prevent occurring drawbar vibration lower than the natural frequency of 1st bending mode of the spindle, and considering the mass and stiffness of built-in motor's rotor is important thing to derive more accurate results.

Keywords

References

  1. Ro, S. K., Park, J. K. and Kyung, J. G., 'Analysis of Dynamic Characteristics of A High-speed Milling Spindle Due to Support Stiffness of Drawbar,' KSMTE, Spring Conference, pp. 484-487, 2003
  2. Choi, D. B., Jo, J. J. and Kim, S. I., 'Dynamic Characteristics of Spindle with a Built-in Motor,' J. KSPE, Vol. 11, No.3, pp. 184-190, Jun., 1994
  3. Jo, J. J., Kim, S. I. and Choi, D. B., 'Dynamic Analysis of a High Speed Spindle syster for Lathes,' J. KSPE, Vol. 11, No.4, pp. 5-12, August, 1994
  4. Park, B. Y. and Kim, J. G., 'Development of High Speed Machine Tool Spindle Regarding Vibration Characteristics,' J. KSPE, Vol. 9, No.3, pp. 149-156, Sep., 1992
  5. Kim, S. I., Jo, J. W., Lee, W. J. and Lee, Y. H., 'Static/Dynamic/Thermal Characteristics Analysis of a High-Speed Spindle System with 50,000rpm,' KSMTE, Spring Conference, pp. 494-499, 2003
  6. Ha, J. Y., Song, S. H. and Kwon, O. C., 'Dynamic Analysis of the High-Speed Spindle Structure for Machining Center,' KSMTE, Autumn Conference, pp. 40-45, 1996