Modeling and Uncertainty Estimation of Ballscrew Nut Stiffness
- Title
- Modeling and Uncertainty Estimation of Ballscrew Nut Stiffness
- Other Titles
- 볼스크류 너트부의 강성 모델링과 불확도 해석
- Author
- 정성종
- Keywords
- Ballscrew; 볼스크류; Contact angle; 접촉각; Hertzian contact; 헤르쯔접촉; Stiffness; 강성; Uncertainty; 불확도
- Issue Date
- 2012-10
- Publisher
- 한국정밀공학회
- Citation
- 한국정밀공학회지, Vo.32, No.5 [2012], p415-422
- Abstract
- Ballscrews are important motion transfer and positioning units of industrial machinery and precision machines. Positioning accuracy of the feed drive system depends upon axial stiffness of ballscrew systems. As the nut stiffness depends upon preload and operating conditions, analytical modeling of the stiffness is performed through the contact and body deformation analysis. For accurate contact analysis, the contact angle variation between balls and grooves is incorporated in the developed model. To verify the developed mathematical stiffness model, experiments are conducted on the test-rig. Through the uncertainty analysis according to GUM (Guide to the expression of Uncertainty in Measurement), it is confirmed that the formulated stiffness model has over 85% estimation accuracy. After constructing the ballscrew DB, a quick turnaround system for the nut stiffness estimation has been developed in this research.
- URI
- http://www.dbpia.co.kr/Journal/ArticleDetail/NODE06282086http://hdl.handle.net/20.500.11754/39920
- ISSN
- 1225-9071
- DOI
- 10.7736/KSPE.2015.32.5.415
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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