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Theoretical and Experimental Study of Spindle Ball Bearing Nonlinear Stiffness

Published online by Cambridge University Press:  07 August 2013

R. Madoliat  and
M. F. Ghanati
R. Madoliat*
Affiliation:
Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran
M. F. Ghanati
Affiliation:
Department of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran
*
*[email protected]
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Abstract

This paper concentrates on theoretical and experimental nonlinear stiffness study of milling machine tool spindle angle contact ball bearing. The theoretical study allows us to build an analytical model to define nonlinear stiffness of angle contact ball bearings based on geometrical and physical parameters. Modifications were done on literature's models (e.g. Balls deformations) having positives impacts on conformity of models to experimental results.

FEM model using ANSYS is constructed to analyze the different parameters affecting the nonlinear stiffness of ball bearing. Among those parameters are physical including the geometry, friction coefficient and the boundary conditions of the model and Numerical parameters such as mesh density and penetration.

Experimental tests were done on the spindle ball bearing 7014, to measure the rigidity. Universal tensile testing machine is used to achieve load displacement curves. The developed theoretical model, constructed finite element model and experimental results showed good conformity.

Keywords

ModelingBall bearingStiffnessFEM modeling
Type
Research Article
Information
Journal of Mechanics , Volume 29 , Issue 4 , December 2013 , pp. 633 - 642
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2013 

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