超声焊接压电换能器的研制
Development of piezoelectric transducer for ultrasonic welding
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摘要: 基于变截面杆作一维纵向振动运动方程,在理论分析的基础上,根据四端网络传递方程和端面运动状态推导出了常用截面形状细杆在各种运动状态下边界条件和四端网络传递矩阵参数以及频率方程.研究了适用于超声焊接的压电换能器的设计方法.为说明设计方法,利用四端网络法对压电换能器和变幅杆进行了设计.利用阻抗分析仪测量和分析了超声换能系统的谐振特性,并进行了系统的振动测试.分析和测试结果验证了设计的正确性。Abstract: In the basis of theoretical analysis,some fundamental four-terminal network matrices and frequency equations of variable cross-sectional bar on various motion state are given in order to investigate convenient and precise designing method,and a new design method of piezoelectric transducer used in ultrasonic welding is studied.The piezoelectric transducer and the variable amplitude bar are designed by four-terminal network method.The resonant characteristics are analyzed and the vibration performance is measured for the vibration apparatus with an impedance analyzer.The results show that the analysis and the design are correct.
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