Influence of Equivalence Dynamic Parameters Variation About Behavior Structure of Milling Machine Tools

This paper has presented a study about behavior structure at universal precision milling machine for tool-shop by the variation of machine’s Equivalence Dynamic Parameters (EDP). These parameters of milling machine: equivalent mass – m [kg], equivalent damping constant – c [N/ms−1 ], equivalent stiffness – k [N/m], have been determined by experimental tests and from calculations, obtaining a exactly range values for each parts. All these had been calculated in function of eigenvalues of milling machine-ωn , which had been determined by experimental tests and mathematical model of dynamic milling process. For that, has been created an original program “Study mck”, which is used by SIMULINK program from MATLAB R14.v7.01 system. Then were executed 11 simulation tests, which were done by certain combinations of m, c, k values and cutting forces parameters, recorded approximately 300 diagrams. The results were significant has determined the chatter frequency very close to eigenvalues of machine by an original method, which had confirmed the experimental measures and analytical calculus and certain solution for improving the dynamic structure of milling machine by its equivalent dynamic parameters.© 2007 ASME