Design and Effect Analysis of Variable Stiffness Magnetic Shock Absorber for Drilling and Milling
It is feasible to adopt semi-active shock absorber to control vibration in drilling and milling process,which can fully overcome the situation of reducing production efficiency caused by cutting vibration by adjusting machining parameters.A dy-namic shock absorber structure is designed.Based on the analysis of the principle,the vibration model and motion equation of the system are given.The damping performance of machine tool spindle in drilling and milling was evaluated by numerical simula-tion.The results show that compared with the case without the dynamic shock absorber,the maximum amplitude of the tool tip corresponding to different spindle speeds decreases before steady state,and when it enters the steady state,the time to complete steady state transition is also shortened after the dynamic shock absorber is added.By comparing the vibration results of tool tip in frequency domain at different spindle speeds,it is obvious that the dynamic shock absorber can effectively suppress vibration.When the spindle speed reaches 800/min,the optimal vibration suppression performance is obtained.The research is helpful to im-prove the damping performance and machining accuracy of drilling and milling equipment.
Peripheral MillingDynamic Vibration AbsorberThe Suppression of Broadband Vibration
NETL
NSTL
万方数据
维普
