旋转变刚度阻尼器抑制薄壁零件铣削颤振

杨毅青,谢日成,徐东东

振动与冲击 ›› 2018, Vol. 37 ›› Issue (2) : 72-75.

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PDF(1070 KB)
振动与冲击 ›› 2018, Vol. 37 ›› Issue (2) : 72-75.
论文

旋转变刚度阻尼器抑制薄壁零件铣削颤振

  • 杨毅青,谢日成,徐东东
作者信息 +

Milling chatter suppression for thin-walled part processing using rotary passive damper with variable stiffness

  • YANG Yiqing, XIE Richeng, XU Dongdong
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文章历史 +

摘要

薄壁零件刚性差,在铣削加工过程经常出现颤振,难以保证加工质量和效率。设计结构新颖的旋转变刚度阻尼器,通过旋转阻尼器的角度可改变其固有频率,并依据减振理论及有限元仿真确定设计尺寸。开展薄壁零件模态测试,确定阻尼器抑制薄壁零件切削颤振的最佳安装角度,最后通过切削实验验证抑振效果。结果表明,旋转变刚度阻尼器角度为80°时,频响函数幅值下降为无阻尼器时的9.8%;调整其角度为20°时达到最优抑振效果,频响函数幅值进一步下降为80°时的13.6%,薄壁零件无颤振临界稳定切深可提高1.8倍。

Abstract

Chatter is caused due to the poor rigidity of thin-walled parts during their milling process, so it is difficult to ensure their machining quality and efficiency. Here, a novel rotary passive damper possessing variable stiffness was designed with its natural frequency changed through rotating the damper orientation. The design sizes were determined based on the vibration reduction theory and the finite element (FE) simulation. The modal tests for thin-walled parts were performed, then the damper’s optimal installation angle for chatter suppression of thin-walled parts milling was determined for milling processing frequency to avoid parts’ modal frequencies. Finally, the chatter suppression effect was verified with milling tests. It was shown that when the damper orientation is 80°, the amplitude of the system’s FRF drops to 9.8% of that without the damper; the optimal chatter suppression reaches when the damper orientation is 20°, the amplitude of the system’s FRF reduces to 13.6% of that when the damper orientation is 80°, the critical stable cutting depth of thin walled parts with no chatter increases by 1.8 times.
 
 

关键词

阻尼器 / 薄壁件 / 铣削 / 颤振

Key words

passive damper / thin-walled part / milling / chatter

引用本文

导出引用
杨毅青,谢日成,徐东东. 旋转变刚度阻尼器抑制薄壁零件铣削颤振[J]. 振动与冲击, 2018, 37(2): 72-75
YANG Yiqing, XIE Richeng, XU Dongdong . Milling chatter suppression for thin-walled part processing using rotary passive damper with variable stiffness[J]. Journal of Vibration and Shock, 2018, 37(2): 72-75

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