Vibration Analysis of Ultrasonic Longitudinal-torsional Composite Hollow Horn

doi:10.3901/JME.2019.05.121

Abstract

Abstract: Longitudinal-torsional composite ultrasonic vibration machining has the advantages of the high machining efficiency, the low cutting force and cutting heat and the reducing of tool wear, while the longitudinal-torsional composite hollow horn can provide better cooling and chip removal effect. The four-terminal network method is used to design a conical composite hollow horn, the helical slots are formed on the composite horn's conical surface as "the modal converter" to realize the output the longitudinal-torsional composite vibration successfully. The effects and sensitivity of number of helical slots n, the helical slots angle θ and slots width w slots on the resonance frequency f are analyzed by the finite element simulation. Combined with the influence of the center hole diameter d on the node location, the resonant frequency f, the magnification m and the torsional longitudinal component ratio i of the horn, aiming at the problem of post-slots frequency offset, a method of resonant frequency correction is proposed, and the experiment was conducted to verifie the method.

Key words: finite element analysis, frequency correction, hollow horn, longitudinal-torsional composite

CLC Number:

TB559

ZHAO Bo, YIN Sen, WANG Xiaobo, ZHAO Chongyang. Vibration Analysis of Ultrasonic Longitudinal-torsional Composite Hollow Horn[J]. Journal of Mechanical Engineering, 2019, 55(5): 121-129.

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