分层式颗粒阻尼镗刀减振试验研究
2019-11-15
作者：张恒明
单位：陕西国防工业职业技术学院
摘要：构建了内置多段分层式颗粒阻尼器，改进了颗粒阻尼镗刀结构。在试验条件恒定的情况下，通过锤击试验对比分层式与整体式颗粒阻尼镗刀的阻尼效应，并利用切削试验比较相应加工工件的表面粗糙度。结果表明：在试验范围内，随着颗粒阻尼器层数的增大，镗刀的减振性先增强后减弱；三层式颗粒阻尼镗刀的抑振性最佳，其阻尼比达到了5.28%，较整体式提高了20.83%，且加工工件表面粗糙度Ra值为1.392μm，较整体式减小2297%。
关键词：颗粒阻尼；镗刀；阻尼比；表面粗糙度
中图分类号：TG713；TH161.6文献标志码：ADOI：10.3969/j.issn.1000-7008.2019.11.006
Experimental Research on Vibration Resistance of Layered
Particle Damping Boring Tool
Zhang Hengming
Abstract:A multistage layered particle damper is built，and the structure of the particle damper boring tool is improved.Under constant experimental conditions，the damping effects of the layered and integral particle damper boring tools are compared by hammering experiment，and the surface roughness of the machined workpieces are compared by boring experiment.The results show that with the increase of the layer number of particle dampers，the vibration damping effect of the boring tool first increases and then weakens.The threelayer particle damper boring tool has the best vibration resistance，with its damping ratio reaching 5.28%，20.83% higher than that of the integral type，and with the surface roughness Ra of the machined workpiece being 1.392μm，22.97% lower than that of the integral type.
Keywords:particle damping；boring tool；damping ratio；surface roughness