Experimental Investigation Of RelativeCoefficients Of Vibration Energy DissipationIn Slideway Joint Contacts Of Machine Tools

Abstract

The paper presents a methodology for experimental identification of relative coefficients of vibration energy dissipation in contacts of machine tool slideway joints. The coefficients are determined based on hysteresis loops recorded during experimental investigations. With the use of a special procedure for processing static test results the values of these coefficients, related to individual surfaces constituting the joint, are determined. Coefficients of vibration energy dissipation can be directly used for modelling viscous or structural damping in the machine tool mass-spring structure in models built of finite elements. Presented are results of experimental verification of the proposed methodology. The experiments were carried out on a milling machine. It has been proved that the identification algorithm, developed by the authors, is effective and can be successfully used in practice. The values of relative coefficients of vibration energy dissipation in the tested milling machine slideway joints, obtained as a result of the identification, are generally lower than those recommended by the literature for slideway model calculations.