摘要
针对传统枪式气钻钻削碳纤维复合材料时容易出现分层、毛刺、撕裂的问题,设计了一种应用于枪式气钻的超声辅助钻孔装置。通过传统解析法设计了一种阶梯型纵振超声换能器;利用PzFlex软件对超声换能器和装配了枪式气钻的换能器进行了有限元分析,结果表明两种状态下的换能器都能实现超声振动,换能器的谐振频率为33.904kHz,装配了枪式气钻的换能器的谐振频率为30.123kHz,仿真结构符合设计要求;最后对换能器进行谐振频率分析和振幅测试,结果表明换能器实际谐振频率与仿真值误差率为2.680%,纵向振幅为3μm;装配了枪式气钻的换能器实际谐振频率与仿真值误差率为7.619%,纵向振幅1.5μm;该振幅能够适用于大部分的超声加工。
To solve the problems of delamination,burring and spalling during the drilling process of carbon fiber reinforced plas⁃tics by traditional pneumatic gun drill,an ultrasonic vibration assisted drilling device for pneumatic gun drilling was designed.A ladder-type ultrasonic amplitude transformer was designed by traditional theoretical analysis.Finite element analysis was car⁃ried out on ultrasonic transducer and transducer equipped with pneumatic gun drill by using PzFlex software.The results show that the transducers in both states can achieve ultrasonic vibration,the resonant frequency of the transducer is 33.904kHz,and the resonant frequency of the transducer equipped with the pneumatic gun drill is 30.123kHz,Simulation results meet design re⁃quirements.Finally,the resonant frequency analysis and amplitude test were carried out for the transducers in two states.The re⁃sults show that the error rate of the actual resonant frequency and the simulated value of the transducer is 2.680%,the longitudi⁃nal amplitude is 3μm.The error rate of the actual resonant frequency and simulated value of the transducer equipped with a pneu⁃matic gun drill is 7.619%,the longitudinal amplitude is 1.5μm.This amplitude can be applied to most ultrasonic machining.
作者
杨兴
高延峰
YANG Xing;GAO Yan-feng(School of Aeronautic Manufacturing Engineering,Nan Chang Hang Kong University,Jiangxi Nanchang 330063,China)
出处
《机械设计与制造》
北大核心
2022年第9期267-272,共6页
Machinery Design & Manufacture
基金
航空科学基金项目(2018ZE56013)。
关键词
枪式气钻
超声振动
超声换能器
PzFlex
有限元分析
Pneumatic Gun Drill
Ultrasonic Vibration
Ultrasonic Transducer
PzFlex
Finite Element Analysis
