摘要
螺纹旋风铣削的多刀具断续切削方式将加剧刀盘与工件间的交互冲击,引起刀盘系统的扭振,影响加工质量。以旋风铣削刀盘系统为研究对象,针对其在周期性切削力矩下发生扭振的特点,提出在铣削刀盘上安装硅油式减振器的抑振方案,进而建立基于硅油式减振器的旋风铣削刀盘系统动力学模型,对模型进行幅频特性分析,并对有无减振器两种方案下旋风铣削刀盘系统的动力学响应特性进行分析,以研究硅油式减振器对旋风铣削刀盘系统的减振效果。结果表明:硅油式减振器可有效地减小旋铣刀盘系统在不同切削频率下的振幅。当系统发生共振时,基于硅油式减振器的旋铣刀盘系统的响应幅值可降至7.10×10-4rad,降低了刀盘系统的扭振对螺纹工件加工质量和刀具寿命等的影响。
Abstract
Multi-tool intermittent cutting way of thread whirling will increase interactive impact between the whirling cutter head and the workpiece, arouse the torsional vibration of the whirling cutter head system and reduce the processing quality. Aiming at the characteristic that the whirling head system has tensional vibration under periodical cutting moment, the silicone oil damper was applied to suppress vibration of whirling head. The dynamic model of the whirling head system based on the silicone oil damper was set up, and then the dynamic response of the system with and without silicon oil damper was investigated based on the amplitude-frequency characteristic of the model, so as to analyze the vibration suppressed effect of the damper for the whirling head system. The result shows that the silicon oil damper can effectively reduce the vibration amplitude of the whirling head system under different cutting frequency. When the system resonance occurs, the tensional vibration response amplitude of the whirling head system is decreased to 7.10×10-4rad, which is helpful to improve the workpiece quality and tool life.
关键词
旋铣刀盘 /
硅油减振器 /
最佳阻尼比 /
抑振
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Key words
whirling head system /
silicon oil damper /
best damp ratio /
vibration suppression
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王禹林 张春建 李隆 冯虎田.
基于硅油减振器的螺纹旋风铣削刀盘系统抑振研究[J]. 振动与冲击, 2013, 32(12): 17-21
WANG Yu-lin;Zhang chun-jian;Li Long;FENG Hu-tian.
The Vibration Suppression Study of Thread Whirling Head SystemBased on the Silicon Oil Damper[J]. Journal of Vibration and Shock, 2013, 32(12): 17-21
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脚注
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