STUDY ON FREQUENCY EQUATION OF ONE-THICK ELECTRODE TRANSDUCER FOR

ULTRASONIC MACHINING

Dai Xiangguo

(Mechanical Engineering Department, Tsinghua University, Beijing 100084)

Fu Shuigen 

(Industrial Training Center, Tsinghua University, Beijing 100084)

Gu Zhengwei

(Mechanical Engineering Department, Tsinghua University, Beijing 100084)

Wang  Xiankui

(Precision Instrumental Department, Tsinghua University, Beijing 100084)

Abstract: Rotary ultrasonic machining is an effective way for machining hard and fragile materials. In order to keep the machining reliable longer, thick electrode ultrasonic transducer should be used. Now relevant study is fewer. If needed, thick ultrasonic transducer is designed by both approximate calculation and test adjustment. In order to design the precise transducer, frequency equation of one-thick electrode ultrasonic transducer is induced .In order to verify the equation, both modal experiments and FEM are used, and the results show that: within the given thickness range of electrode, resonance frequency error is less than 5%, and the frequency can meet the engineering requirement.  

Key words: Ultrasonic transducer   Thick electrode  Frequency equation  Ultrasonic machining

CLC No: TB552

清华大学985资助项目. Received 20030418, received in revised form 20031030