| Citation: | JIN Tao, HU Xiaoping, YU Baohuaet al. Design and application of compound conical horn with cylinder at big end[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(8): 1630-1638. doi: 10.13700/j.bh.1001-5965.2018.0699(in Chinese)
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Aimed at the problem of poor durability of the domestic ultrasonic horn, a new type of compound horn is designed to meet the amplitude and make the horn have a small working stress.The new composite horn parameter equation is established by the wave equation, and the parameters such as magnification, shape factor and stress maximum point are calculated.Frist, the finite element analysis software was used to analyze the kinetics of the horn. The obtained results were compared with the theoretical results to verify the correctness of the theoretical formula. Second, on the basis of this, compared with the conical horn, the exponential deformation horn and compound conical horn with cylinder at big end, the results show that the new composite horn has better comprehensive performance and smaller maximum stress. Finally, based on ANSYS Workbench optimization design function, the horn is optimized and trimmed, and the optimized horn is subjected to impedance analysis and vibration performance test. The test results show that the theoretical performance parameters of the new composite horn are basically consistent with the experimental test results. The resonant frequency of the rod is 20 013 Hz. When the transducer peak-to-peak value of the output amplitude is 13 μm, the peak-to-peak value of the output amplitude of the horn can reach 40 μm, and the amplitude amplification factor of the horn is 3.08, which satisfies the requirements of the cutting experiment amplitude.
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