超声旋压变幅器的设计与分析

Design and Analyses of Ultrasonic Spinning Amplitude Transformer

在超声旋压系统中,变幅器由变幅杆与旋轮耦合而成,其谐振振型为变幅杆纵向振动与圆盘弯曲振动。该振型计算复杂,很难直接获得较为精确的尺寸,设计过程中需要不断修正尺寸以达到所要求的频率和振型。借助MSC.Marc有限元分析软件对变幅杆与旋轮耦合后的变幅器进行数值模拟分析,研究旋轮各个尺寸对变幅器谐振频率的影响,得到了旋轮各个尺寸对变幅器谐振频率的影响规律,设计出了符合要求的变幅器,试验表明其振动效果理想。

Abstract： In an ultrasonic spinning system, amplitude transformer was made from luffing rod and rotary wheel, the resonance vibration modes were： luffing rod longitudinal vibration, disc bending vibration. Since it was very complex to compute for this type of oscillator, it was difficult to obtain accurate size directly. In order to achieve design requirements of the frequency and vibration mode, it was necessary to constantly change the size during design process. This paper gave a lot of numerical simulation analyses for the amplitude transformer by means of the MSC. Marc finite element analysis software, the influences of each size of the spinning wheel on the resonance frequency of amplitude transformer were studied, the influence law of each size of the spinning wheel on the resonance frequency of amplitude transformer was obtained. An amplitude transformer which can meet the requirements is designed, and the desired effect of vibration was obtained in the tests.