Development of 3D Resonant Elliptical Vibration Transducer for Dual-Frequency Micro-Dimple Surface Texturing

This paper proposes a dual-frequency surface texturing method that generates small, round, drop-shaped micro dimples on a cylindrical surface. To achieve this, two devices were developed: a 3D resonant elliptical vibration transducer and a non-resonant displacement amplifier. The 3D resonant elliptical vibration transducer operates at high frequency (approximate to 18 kHz) and has three vibration modes: one longitudinal vibration mode and two bending vibration modes. The one-dimensional displacement amplifier operates at low frequency (approximate to 155 Hz). Finite element analysis was used to develop 3D resonant elliptical vibration transducer. One dimensional displacement amplifier was designed on the basis of single parallel flexure hinge mechanism and its working principle was based on non-resonant transducer. The feasibility of the proposed method was examined by performing a surface texturing experiment on Al6061-T6 material specimen. The wettability of the micro-dimple structured surface was also examined by measuring the water contact angle.

Automated summary

This paper presents a dual-frequency surface texturing method for generating micro dimples on a cylindrical surface. Two devices, a 3D resonant elliptical vibration transducer and a non-resonant displacement amplifier, were developed to operate at high and low frequencies respectively. The feasibility of the proposed method was demonstrated through surface texturing experiments and water contact angle measurements on Al6061-T6 material specimens.