การประชุมวิชาการระดับชาติ ครั้งที่ 16
มหาวิทยาลัยราชภัฏนครปฐม

This research studies the design of a sonotrode for the ultrasonic assist vibration surface polishing. The objective is to study the effects of changing of the shoulder-length, Shoulder placement combined with clamping equipment, Shoulder radius and vibration amplitude when completed stack also. The ultrasonic frequency is generated by a 20±1 kHz ultrasonic generator connected to a piezoelectric to convert electrical waves into vibrations. The experiment will use the finite element method to simulate the natural frequency to select the mode of longitudinal direction and resonance of the entire system corresponds to the frequency from the generator. Frequency response and internal stress to choose and present a design that is suitable for use. Compare with the actual experimental results in AL 7075 sonotrode. The experiment, it was found that the resonance frequency can be adjusted by modified the length of the shoulder distance and radius to making the resonance adjustable. And the clamping location should be same length to the designed center of gravity to force the single node of the vibration wave to occur at half the length of the sound wave in the tools. The finite element method is used to simulate the sonotrode shape to reduce material preparation losses and tuning time to determine the properly desired frequency of ultrasonic stack. This research used Computer-aided engineering simulation to predict the frequency response of the dimensional variables of the design by selecting an uncomplicated sonotrode