Analysis Of Non-linear Vibration Characteristics Of Parallel Double Vibration Damping Boring Bar

In order to improve the working accuracy and surface roughness of deep-hole machining in the boring process, it is necessary to carry out the deeply analysis and research of the vibration characteristics of the too and the measure of vibration reduction. With the increasingly sophisticated development of Magneto-rheological Fluid Technology and Dynamic damping technology, this paper has proposed parallel hybrid double mass magneto-rheological damping boring bar. To make the results of analysis and calculation are in agreement with the vibration characteristics in the actual situation, and to accommodate the nonlinear factors in the boring bar system,the author would investigate the non-linear vibration characteristics of boring bar system.According to the development trend of the domestic manufacturing industry of the boring bar, the author determines the dynamic damping boring bar as the object of study, and focuses on the comparative analysis of non-linear vibrations of parallel double mass magneto-rheological damping boring bar and single mass damping boring bar. Firstly, the non-linear dynamic model of ordinary boring bar has been built, and done non-qualified treatment, which was going to eliminate influence of dimension. Secondly, using the nonlinear oscillation theory--multiple scales method,the author conducted first approximate solution on oscillatory differential equation,and gave a numerical solution with the help of Matlab software. The results were compared to verify the correctness of the calculation. In the analysis of nonlinear vibration characteristics of damping boring bar, single mass damping boring bar and non-linear vibrations of parallel double mass magneto-rheological damping boring bar were established respectively, nonlinear differential equations of 2-DOF and3-DOF were build up, and a numerical solution was given. Thirdly, the nonlinear vibration characteristics of the two systems were studied under different parameters.Finally, the simulation is performed with dynamic model of two kinds of boring bar by the software ADAMS. Through analyzing and contrast, which has drawn aconclusion that parallel double mass damping boring bar than single mass damping boring bar has better damping performance.In this paper, the author combined knowledge of nonlinear dynamic with actual manufacturing problems, which has provided useful materials for the design and manufacture of built-in parallel dual mass dynamic damping boring bar, and played a guiding and supporting role for further study.