Static And Dynamic Analysis Of High Speed Horizontal Machining Center

High speed machining center is one of the hot spots of the machine development in recent years. With the tendency towards higher cutting speed, higher feed rate and higher machining accuracy, it requires that machining centers should have better work performances including not only fine static characteristics, but also fine dynamic characteristics. Therefore, the static and dynamic analysis of machining centers has become an important part of the design.In this paper, the structure of high speed horizontal machining center is introduced and taking carriage as an example, the analysis process of high speed horizontal machining center is described explicitly. The main contents include:(1) Static analysis. It includes model simplification, finite element modeling, settle of contact faces, restraint condition and load apply. At last deformation and stress nephograms of all parts are laid out.(2) Modal and harmonic response analysis. Based on static analysis, modal and harmonic response analysis is carried out. First six natural frequency and mode shape are obtained in modal analysis. Through the harmonic response analysis, the harmonic response curves of the all parts which are impacted by a periodic force are illustrated. The results of dynamic analysis can be taken as a basis of plan for dynamic experiments.(3) Dynamic experiments. Base on dynamic analysis, we use hammer excitation in the experiments. After analysis data of experiments, natural frequency and dynamic stiffness are obtained. at last results of experiments and analysis are compared.From the results of comparison, we can conclude that error is in an acceptable limit, but a lot of research work still needed to minimize error.