| Citation: | SHAO Z Z，ZHENG K，DONG S，et al. Design of double bending rotary ultrasonic elliptical vibration machining system[J]. Journal of Beijing University of Aeronautics and Astronautics，2024，50（9）：2912-2918 （in Chinese） doi: 10.13700/j.bh.1001-5965.2022.0712
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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.
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