双弯曲旋转超声椭圆振动加工系统设计

Design of double bending rotary ultrasonic elliptical vibration machining system

由于旋转超声单一振动模式加工效率提升有限,因此采用超声振动激励源耦合法设计了一种双弯曲旋转超声椭圆振动加工系统。推导弯曲波动方程,计算的弯曲超声振动系统参数与仿真结果的理论分析误差仅为5%。耦合双弯曲旋转超声椭圆振动加工系统2个不同方向的振动,控制弯振频率偏差低于1%。对超声刀柄的法兰位置与形状进行有限元分析发现,开设减振槽有利于增大弯振振幅,并确定了法兰的最佳位置。对双弯曲旋转超声椭圆振动加工系统的振动频率和振幅进行测试,结果表明:所设计系统在工作频率和2个方向的振幅均满足设计预期。

The processing efficiency of the rotary ultrasonic single vibration mode is limited.Therefore,an elliptical vibration processing system with double-bending ultrasonic vibrations was designed using the ultrasonic vibration excitation source coupling method.The bending wave equation was derived,and the calculated parameters of the bending ultrasonic vibration system showed only a 5%error compared to the simulation results in theoretical analysis.The coupled double-bending rotary ultrasonic elliptical vibration processing system combines vibrations in two different directions,controlling the bending vibration frequency deviation to be less than 1%.Finite element analysis was performed on the flange position and shape of the ultrasonic tool holder,revealing that the inclusion of damping grooves helps increase the bending vibration amplitude and determines the optimal position of the flange.Finally,the vibration frequency and amplitude of the double-bending rotary ultrasonic elliptical vibration processing system were tested,and the results indicated that the operating frequency and amplitudes in both directions met the design expectations.