摘要：The following study concentrates on nonlinear stiffness of milling machine tool spindle angle contact ball bearings in static mode. As a primarily theoretical study, it allowed us to build an analytical model to define nonlinear stiffness of angle contact ball bearings based on geometrical and physical parameters. Ball bearing deformation is also considered. Modifications were made to literature models resulting in better conformity of models to experimental results. An FEM model using ANSYS was constructed to analyze the different parameters’ effects on nonlinear stiffness of ball bearings. Among those parameters are physical ones, including the geometry, friction coefficient and boundary conditions, and numerical parameters such as mesh density and penetration. Experimental tests were done on the spindle ball bearing 7014 to measure the rigidity. A universal tensile testing machine was used to achieve the load-displacement curve. Experimental results were compared to the theoretical model. The developed theoretical model, constructed finite-element model, and experimental results showed good conformity.
关键词：Modeling, Ball bearing, Stiffness, FEM modeling
