深孔钻削刀具系统磁流变制振器设计及其动态性能研究

摘要

依据实际深孔钻削刀具系统的结构布局及其振动特征，设计了一种新型刀具系统制振器的结构布局形式。以制振器理想输出阻尼力和内磁感应强度达到饱和为设计目标，给出了磁流变制振器结构的优化设计方法及其具体结构参数；运用有限元法，分析了新型制振器的磁场分布特征及其输出阻尼特征。以此为基础，通过深孔钻削实验研究，获得了不同励磁电流和切削参数条件下刀具振动的抑制效果，验证了所提出的新型磁流变制振构型的可行性和有效性。%Considering the structure and vibration characteristics of a drilling-tools system in deep-hole drilling,a novel structural layout of the vibration suppression device is proposed.With the goal of obtaining a desired damping force output and controlling the magnetic saturation strength,the structure optimization of a novel magnetorheological vibration suppression device and its specific structure parameters are given.Combining this with the finite element method,the magnetic field distribution of the proposed vibration suppression device and its damping characteristics output are analyzed.Based on the processes mentioned above,the vibration control experiments of the tool system in deep-hole drilling is carried out so as to investigate the relevant experimental results of tool vibration control under the conditions of different excitation currents and cutting parameters.It can be seen from the experimental results that the new model of magnetorheological damping configuration proposed in this paper satisfies the demands of the practical deep-hole machining process.