Abstract
Today’s machine tools are highly complex mechatronic systems capable to exertlarge translational and rotatory movements. In most cases rolling bearings areused to connect the moving parts to each other. As full FE models of rollingbearings can consume a large amount of degrees of freedom (DOF) efficientmethods for reducing the DOF consuming rolling elements to more simpleequivalent models are needed. As an example a linear guide system is used. Aspecial feature of the considered linear guide is that the runner blockconsists of three separate parts, which are hold together only by pretensionand friction. FE simulations of such linear guide system were not reportedbefore in the literature. Beside the full FE model three equivalent contactmodels are presented. The first two equivalent contact models feature novelcharacteristics. Advantages and disadvantages of the equivalent models arediscussed using as reference a slice of the full model and simulation resultsof static stiffness. The validation of the numerical models is also done usingthe general analytical solution of Hertz.
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