Morphology Analysis and Process Optimization of Micro-cylinder Structure in Micro-nano Additive Manufacturing

doi:10.3901/JME.2023.01.286

Abstract

Abstract: In view of the typical printing defects existing in the micro-nano structure additive manufacturing of sub-pixel microscanning LCD photocuring 3D printing technology, it is devoted to optimize the printing process and analyzed the printing structure to improve the printing quality and production efficiency. Firstly, the post-treatment time is determined by designing the single factor test and printing model, and the influence of post-curing time on the hardness, roughness and morphology of parts is analyzed. Secondly, combined with the printing process parameters, the orthogonal test and printing cylinder array model are designed to analyze the influence of printing layer thickness, exposure time and vibration times on the forming of micro-cylinder. The results show that the best curing effect is obtained when the curing time is 5~10 min, and the surface roughness Ra is about 29 nm and shore hardness is about 88 HD. The influence order of printing process parameters on the diameter of micro-cylinder is exposure time, print layer thickness and number of vibrations. Under the premise of balanced printing quality and printing efficiency with optimized printing parameters, the micro cylinder with diameter of 50 μm and height of 210 μm can be well printed under the print layer thickness of 10 μm, the exposure time of 2 500 s and the number of vibrations is 64 x.

Key words: photocuring 3D printing, micro-nano additive manufacturing, post-curing, process parameter

CLC Number:

TG156

CHEN Yutian, WU Chongjun, WEI Xinyi, MENG Xiankai, LIU Jie, WANG Qibing. Morphology Analysis and Process Optimization of Micro-cylinder Structure in Micro-nano Additive Manufacturing[J]. Journal of Mechanical Engineering, 2023, 59(1): 286-297.

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