Abstract
Vibration is a concern in the boring process due to the low dynamic stiffness of long cantilever boring bars. Vibration has a negative impact on the processing quality and processing performance. Dynamic vibration absorbers (DVAs) are used to consume vibration energy to improve the performance of boring operations. In this study, a nonlinear model is established to study the dynamic characteristics of a boring bar. Due to the consideration of nonlinear factors, the amplitude-frequency characteristics of the boring bar appear as an interesting phenomenon. As the damping of the DVA has an important influence on the vibration amplitude of the boring bar, the engineering implementation of this damping is conducted. Since the damping oil fills a hollow cylinder within the DVA, the length, inner diameter, and outer diameter of the hollow cylinder, along with the oil pressure and excitation frequency, are selected as parameters to study their influences on the damping value.
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