CAJ | 학술논문

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。
근거초성파가공원리,설계료일충신형 Nomex 봉와재료수공초성파절할주축。채용사단망격법대변폭간진행료유한원분석화위이절점수정。건립료초성파절할성학계통유한원모형,병진행료모태분석。종진형도가이간출변폭간법란반처위이변화교소,수출단진폭교대。이용격광위이전감기측량료도구적진동위이,원형도진폭 a =22·37μm,만족가공요구。이용초성파절할주축대 Nomex 봉와재료진행료대량절할실험,취득료가공표면평정광활、가공정도고、절삭과정중몰유분진오염등현저효과。
According to the principles of ultrasonic machining,a new type of CNC ultrasonic cut-ting 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 fi-nite element model of ultrasonic acoustic system was established and analyzed.According to the dia-gram,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 =22·37 μm that meets the process-ing 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 pro-cessing precision,no dust in machining process.