| Summary: | 碩士 === 國立交通大學 === 機械工程系所 === 101 === The ultrasonic vibration assisted manufacture can improve the material properties and reduce the forming pressure. When some manufacture processes such as embossing, welding, cutting or grinding process were combined with ultrasonic vibration system at high working temperature, products with both high precision and high quality can be obtained. Presently in the industry, the design process of the ultrasonic vibration system is based on approximate theoretical solutions and empirical formulas to obtain rough design, and then finite element analysis was conducted to refine the design. This numerical design was then modified through iterative trial-and-error experiments. The whole process is time consuming in getting final optimum parameters.
In this study, an ultrasonic vibration system with high working temperature was analyzed by finite element software ANSYS. The simulation results were compared to experimental measurement, to confirm the validity of the numerical analysis. The verified finite element model can be used in the components design of the ultrasonic vibration system with elevated temperature. Finally, this research combines the finite element analysis and the optimum design to provide the uniformity of the output amplitude of the system. Then, the optimal geometry of horn for ultrasonic vibration system with high working temperature was derived and experimentally verified. The optimum design automatic ultrasonic vibration system in this research can apply to the design of hot embossing apparatus.
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