Design of a new dynamic vibration absorber to reduce the vibration of the boring bar

This paper introduces a new and applicable dynamic vibration absorber to reduce the vibration of long-length of the boring bar. This dynamic vibration absorber reduces the transverse vibration of the tool in the machining process. For this purpose, firstly, the boring bar is modeled in the state equipped with the proposed dynamic vibration absorber. Then, the governing equations of the system are derived by calculating the kinetic energy and potential of the system and using the extended Hamilton's principle. Considering that the main vibration of the boring bar appears in the first mode, therefore, to design and determine the dimensions and technical specifications of the dynamic vibration absorber, the system of the boring bar and the absorber connected to it is approximated as a simple equivalent model of two degrees of freedom. Then, the stiffness equivalent and equivalent mass of the boring bar and the absorber are extracted. At the end, the effect of different system parameters on the amount of technical characteristics of the absorber is investigated and the results are presented in the form of graphs. The results show that according to the usable space for the dynamic vibration absorber, it is necessary to make a compromise to determine the dimensions and technical characteristics of the absorber. The results can help researchers and engineers in the industry to design a dynamic vibration absorber system to increase the quality of the machining process.