Affiliations: [a] State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, China | [b] School of Mechanical Engineering, Hangzhou Dianzi University, Xiasha Higher Education Zone, Hangzhou, Zhejiang, China | [c] The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, Zhejiang, China
Correspondence:
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Corresponding author: Kun Jia, State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi'an Jiaotong University, No. 28 West Xianning Road, 710049 Xi'an, Shaanxi, China. E-mail:kunjia@mail.xjtu.edu.cn
Abstract: Additive rapid prototyping categorized into fused
deposition modeling (FDM) and micro-stereolithography has received increasing
interest in the past decade. Recent advance in FDM enables multiple
materials to be printed in the same layers of a component. However, for
micro-stereolithography, it is still a challenge to fabricate complex
structure embedded with another material. In this work, a noncontact
ultrasonic clamping stage is proposed for micro-stereolithography to hold
the material or structure encapsulated by photo-curable polymer which will
be solidified after exposure to UV light. In order to achieve this,
ultrasound field is generated by three 2 MHz PZT transducers in millimeter
sized region of a chamber filled with photosensitive fluid. Theoretical
analysis illustrates that acoustic radiation force and torque will drive
micro-particles in the sound field to force potential minimum and maintain
their own equilibrium posture. Finally, rectangular silica particle with
100 μ m characteristic length is used to perform the controllability of
our device.
Keywords: Micro-stereolithography, embedded material, non-contact trapping, acoustic radiation force
