Journal
PRODUCTION ENGINEERING-RESEARCH AND DEVELOPMENT
Volume 6, Issue 1, Pages 39-46Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11740-011-0349-3
Keywords
FEM; Linear guide; Rolling contact; Hertz; Plasticity
Categories
Funding
- Institute of Control of Manufacturing Units Stuttgart (ISW)
- excellence cluster SimTech Stuttgart
- GSaME Stuttgart
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Today's machine tools are highly complex mechatronic systems capable to exert large translational and rotatory movements. In most cases rolling bearings are used to connect the moving parts to each other. As full FE models of rolling bearings can consume a large amount of degrees of freedom (DOF) efficient methods for reducing the DOF consuming rolling elements to more simple equivalent models are needed. As an example a linear guide system is used. A special feature of the considered linear guide is that the runner block consists of three separate parts, which are hold together only by pretension and friction. FE simulations of such linear guide system were not reported before in the literature. Beside the full FE model three equivalent contact models are presented. The first two equivalent contact models feature novel characteristics. Advantages and disadvantages of the equivalent models are discussed using as reference a slice of the full model and simulation results of static stiffness. The validation of the numerical models is also done using the general analytical solution of Hertz.
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