The aeronautic industry requires high speed and high power spindles to obtain high material removal rates during long rough milling operations. The weakness of HSM spindle is the bearings, although high precision hybrid ball bearings have been developed to achieve this critical application. Inadequate use of spindles inevitably leads to shortened lifetimes. Choosing the operating conditions is a required step before machining applications. It can be achieved through either experimental tests or numerical modeling that leads to stability lobe diagrams. Stability of cuts relies on the dynamic behavior of the spindle, which is particularly due to the eigenfrequencies of the tool-shaft assembly. The frequencies depend on bearing stiffness that can change under operating conditions. That is why the impact of cutting conditions and bearing parameters on its stiffness are studied in the paper. A five degrees of freedom model of angular ball bearing is briefly presented. A complete bearing model is introduced. The originality of the approach is the complete technological modeling, notably of the radial expansions of inner and outer rings of bearing. A non-linear expression is established from continuum mechanics model. The influence of geometry of bearing, operating conditions and design parameters of spindle on the bearing stiffness are established and analysed. Then, modal analyses of the tool-spindle assembly are carried out in relation to the varying bearing stiffness. Finally, significance of the approach is demonstrated through the analyses of Frequency Response Function.
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ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis
July 2–4, 2012
Nantes, France
Conference Sponsors:
- International
ISBN:
978-0-7918-4487-8
PROCEEDINGS PAPER
Bearings Influence on the Dynamic Behavior of HSM Spindle Available to Purchase
David Noel,
David Noel
Institut de Recherche en Communications et en Cybernetique de Nantes, Nantes, France
Universite de Nantes, Nantes, France
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Mathieu Ritou,
Mathieu Ritou
Institut de Recherche en Communications et en Cybernetique de Nantes, Nantes, France
Universite de Nantes, Nantes, France
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Sebastien Le Loch,
Sebastien Le Loch
Universite de Nantes, Nantes, France
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Benoit Furet
Benoit Furet
Institut de Recherche en Communications et en Cybernetique de Nantes, Nantes, France
Universite de Nantes, Nantes, France
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David Noel
Institut de Recherche en Communications et en Cybernetique de Nantes, Nantes, France
Universite de Nantes, Nantes, France
Mathieu Ritou
Institut de Recherche en Communications et en Cybernetique de Nantes, Nantes, France
Universite de Nantes, Nantes, France
Sebastien Le Loch
Universite de Nantes, Nantes, France
Benoit Furet
Institut de Recherche en Communications et en Cybernetique de Nantes, Nantes, France
Universite de Nantes, Nantes, France
Paper No:
ESDA2012-82563, pp. 107-114; 8 pages
Published Online:
August 12, 2013
Citation
Noel, D, Ritou, M, Le Loch, S, & Furet, B. "Bearings Influence on the Dynamic Behavior of HSM Spindle." Proceedings of the ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. Volume 4: Advanced Manufacturing Processes; Biomedical Engineering; Multiscale Mechanics of Biological Tissues; Sciences, Engineering and Education; Multiphysics; Emerging Technologies for Inspection and Reverse Engineering; Advanced Materials and Tribology. Nantes, France. July 2–4, 2012. pp. 107-114. ASME. https://doi.org/10.1115/ESDA2012-82563
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