颗粒阻尼铣刀减振分析与试验研究

Vibration analysis and experimental research on particle damping milling cutter

研究了多种阻尼颗粒在不同填充参数下对颗粒阻尼铣刀减振效果的影响。对颗粒阻尼铣刀进行锤击实验以测得刀杆阻尼比,进行铣削实验以测得工件表面粗糙度。比较了颗粒粒径、密度、填充率对减振效果的影响,发现了较优的填充颗粒参数。实验结果表明:填充颗粒直径越小,密度越大、减振效果越好,当填充率为70%时,减振效果最佳;选取合理填充颗粒参数时,刀杆阻尼比最高达到4.35%,铣削后的工件表面粗糙度值最低为1.392μm,相比于实心铣刀降低了50.09%;球粉混合填充模型有待进一步研究。

The impact on damping effect of particle damping milling cutter produced by multiple particles was re- searched with different filling parameters. For particle damping milling cutter the hammering test was performed to measure the damping ratio of milling cutter arbor and the milling experiment was used to test the surface roughness. Compared with the influence of density, dimension and filling ratio of parti- cles on the damping effect, the experiments presented the better parameters of particles. The test results showed that, the smaller diameter and the higher density particles has, the better damping effect milling cutter produces, the best damping effect occurs at the filling ratio of 70% ; the highest damping ratio of milling cutter arbor reaches to 4.35% and the minimum of surface roughness of workpiece is 1. 392um after milling, which has been reduced by 50.09% compared with solid milling cutter, when selecting rea- sonable filling parameter; the hybrid filling model of sphere with powder needs further study.