Abstract
A new test method has been developed to evaluate the temperature rise of machine-tool structures. In this method, which uses short period data obtained during a warm-up run, the machine-tool structure is modelled by the finite element method (FEM) and is analysed in terms of the eigenvalues of the thermal equation. Characteristic temperature rise curves for the structure are obtained, which have variable parameters. The values of these depend upon the strength of heat sources. Then, by determining the parameters such that the characteristic temperature rise curves fit those obtained during a warm-up run, it is possible to identify the strength of the heat sources, and thus the values of temperature rise for any point in the structure. Experiments have been carried out which verify the effectiveness of the method.
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