Development of a novel piezoelectric-driven non-resonant elliptical vibrator with adjustable characteristics

Abstract

Aiming at the fabrication of a micro-textured surface, a novel piezoelectric-driven non-resonant elliptical vibrator is proposed in this paper; the output characteristics could be adjusted by the length change of the tool holder. The flexible mechanism is the primary structure of the vibrator, which includes a lever type mechanism, an enhanced Scott–Russell mechanism, and a T-shaped mechanism. The former two mechanisms are used to enlarge the output of the piezoelectric actuator, and the T-shaped mechanism is applied to transfer the parallel movements to the elliptical trajectory. The theoretical models including the elliptical trajectory, output stiffness, and resonant frequencies are established to investigate the impacts of the tool holder and controlling signals on the output characteristics of the vibrator, which are further validated using the finite element analysis method. A prototype is developed by integrating the non-resonant elliptical vibrator assembly and controlling system. Some experiments are carried out to verify the basic performance and the adjustable properties of the vibrator.

Simulation and Experimental Study of Non-Resonant Vibration-Assisted Lapping of SiCp/Al

“…The ultrasonic vibration device usually works near the resonance point, and its high-frequency vibration will produce much heat, affecting the processing effect of SiCp/Al composite materials [ 19 , 20 ]. In addition, resonant ultrasonic vibration suffers from many limitations in vibration frequency and amplitude adjustment, which makes it difficult to achieve a wide range of free adjustments, and the selection of processing parameters will be limited [ 21 , 22 ].…”