功率超声铆焊变幅杆的设计与分析OA北大核心CSTPCD

In the design of power ultrasonic plastic riveted horn,the resonant frequency and amplitude of longitudinal wave are the key parameters to the design.In an engineering practice,the stepped riveted horn is taken as the design object.In the finite element modal analysis,the natural frequency of longitudinal wave is 19 982 Hz.The resonance frequency of its harmonic sweep response is 20 082 Hz.In impedance analysis,the resonance frequency of the stepped riveted horn vibration is 19 813 Hz.In general,the error change rate between three frequencies is small.Under the condition that the material damping rate is 0.004,the maximum amplitude displacement at the end of horn with harmonic response is 59.16 μm.Using laser vibrometer,the amplitude of the end of horn is about 49.8 μm.The error between them is also very small.Practical processing verification,the riveting effect is better.The results show that the natural mode,harmonic response,impedance analysis and amplitude test analysis can provide efficient analysis and test methods for the engineering design of ultrasonic horn.