中文摘要：

超薄壁圆筒的旋压生产过程中极易出现旋压失稳情况。旋压载荷过大是导致失稳的主要原因,而超声可以有效降低塑性变形载荷。在超声旋压系统中,变幅杆是关键的部件之一,其设计关系到系统的谐振,输出振幅大小及阻抗匹配等。就应用于超声旋压系统的变幅杆进行理论上的设计计算,并利用MSC.Marc有限元分析软件进行模态分析,验证理论计算的正确性,设计出能够应用于超声旋压系统的复合变幅杆,实验检测表明实际固有频率符合设计要求。

英文摘要：

In ultrasonic spinning system, to achieve ultrasound spinning smoothly, the output amplitude through the ultrasonic transformer transducer must be enlarged, and the ideal resonance frequency and vibration model must be carefully designed to get the right processing amplitude, thus the amplitude transformer design in ultrasonic spinning system is very important. This study conducted structural design calculation of ultrasonic compound amplitude transformer （or compound horn）, and conducted modal analysis with the use of Marc finite element analysis software, obtained the resonant frequencies under the designed modes, demonstrated the accuracy of theoretical design calculation. Simulation and vibration trial results proved that the designed compound horn can satisfy the requirements of general ultrasound spinning.