Research on Ultrasonic Cutting Acoustic System of Machining Nomex Honeycomb Material

Abstract

Abstract:

According to the principles of ultrasonic machining, a new type of CNC ultrasonic cutting spindle of cutting Nomex honeycomb materials was designed. The acoustic horn was designed by the four-end network method, and the acoustic horn was also analyzed and corrected by FEM. The finite element model of ultrasonic acoustic system was established and analyzed. According to the diagram, the displacement of horn flange changes little, the output amplitude is larger. The amplitude of the cutter was measured by laser detector, and was worked out a=22.37μm that meets the processing requirements. A large of experiments of cutting Nomex honeycomb materials using the ultrasonic cutting spindle was carried out, and the results are significant: smooth processing surface, high processing precision, no dust in machining process.

Key words: ultrasonic cutting;composite horn;acoustic system, modal analysis

摘要：

根据超声波加工原理，设计了一种新型Nomex蜂窝材料数控超声波切割主轴。采用四端网格法对变幅杆进行了有限元分析和位移节点修正。建立了超声波切割声学系统有限元模型，并进行了模态分析。从振型图可以看出变幅杆法兰盘处位移变化较小，输出端振幅较大。利用激光位移传感器测量了刀具的振动位移，圆形刀振幅a=22.37μm，满足加工要求。利用超声波切割主轴对Nomex蜂窝材料进行了大量切割实验，取得了加工表面平整光滑、加工精度高、切削过程中没有粉尘污染等显著效果。

关键词: 超声波切割, 复合变幅杆, 声学系统, 模态分析

CLC Number:

TH122

Zhang Yundian, Xiao Jianxiong, Fang Liang, Lu Zhiping. Research on Ultrasonic Cutting Acoustic System of Machining Nomex Honeycomb Material[J]. China Mechanical Engineering, 2014, 25(23): 3132-3136,3146.

张云电, 肖健雄, 方亮, 陆志平. 蜂窝材料超声波切割声学系统研究[J]. 中国机械工程, 2014, 25(23): 3132-3136,3146.

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