Vibration Analysis And Experimental Research On Particle Damping Boring Bar

The vibration of machining process will reduce the surface quality of machined parts.Because the size of the tool is limited, especially in the deep part of the process, as it willcause insufficient rigidity of the cutting tool are more prone vibration, Therefore, the toolvibration technology is an important research topic. Particle damping technology is a passivevibration control technology, First, it does not need to increase the overall mass of thestructure, during the design of vibration of the boring bar, without changing the overall designof the shape of the structural member can reduce the overall quality of the boring bar;Secondly, its special damping mechanism, so as to increase the damping effect is verysignificant. Compared with other damping, particle damping technology has not only changedthe structure of small, broad band vibration and can act in harsh environments such as hightemperature and pressure, it has a very broad application prospect.This paper describes the method of generating and vibration boring bar cutting processvibration, Compare ordinary boring bar and damped boring bar for dynamic analysis,comparing the impact the different damping ratio of the amplitude of the boring bar. Throughthe solid and hollow boring bar boring bar modal analysis and harmonic response analysis,conclusions dynamic performance parameters damped boring bar. Second, it introduces amethod to select particle damping technology and damping particles. Briefly discusses thecurrent popular computing discrete particle damping element method. Then make analysis ofenergy particle collision damping. Introduce particle material properties which includingstatic and dynamic properties. Again through the ABAQUS finite element analysis software tosimulate the collision of the ball, the analysis of two small ball collision and two small ballattack small particle collision energy, the conclusions drawn in the middle of two small ballsof metal powder added to plastic is better when the ball better than just the effect of the collision energy. Finally, arrange the boring bar cutting test particle to observe damping effect.Comparative tests only filler particles obtained according to the power spectral densityanalysis, only the metal powder filler, the damping effect of the metal particles and a metalpowder mixture filled in the three cases. Conclusions in machining metal powder filling onlythe best damping boring bar. Description friction between the metal powder predominant formof energy. It illustrates that the friction between the metal powder energy plays a major role.