Design of ultrasonic-assisted micro extrusion forming system
PEN Zhuo 1, HAN Guangchao 1,2,3 , LI Kai 1, CHEN Hao1
1 School of Electronic Information & Mechanics, China University of Geosiences, Wuhan 430074, China
2 State Key Laboratory of Advanced Welding and Joining (Harbin Institute of Technology), Harbin 150001, China
3 State Key Laboratory of Materials Processing and Die & Mould Technology (Huazhong University of Science and Technology), Wuhan 430081, China
For the ultrasonic-assisted micro extrusion process of micro parts, the ultrasonic micro extrusion forming system was developed to realize the ultrasonic-assisted vibration of workpiece. And the numerical simulation analysis method was used to optimize the vibration characteristics of rectangular hexahedron sonotrode. Basing on the ultrasonic vibration mode of rectangular hexahedron which could implement vertical vibration modal, the resonant surface of sonotrode was made to realize uniform vertical output of ultrasonic amplitude after having been made structure optimization and set up with a certain number of cylindrical holes inside. Double transducers and double stepped horns were designed to support the whole ultrasonic vibration system and apply input of ultrasonic vibration energy. Experimental results show that the micro ultrasonic assisted extrusion forming system can load micro forming workpiece and die with vertical ultrasonic resonant vibration. It can also satisfy the requirement of micro extrusion forming process with ultrasonic vibration of workpiece.
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