微纳增材制造微圆柱结构的形貌分析与工艺优化研究  

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

作　　者：陈玉田 吴重军 魏馨怡 孟宪凯[3] 刘杰 王琪冰 CHEN Yutian;WU Chongjun;WEI Xinyi;MENG Xiankai;LIU Jie;WANG Qibing(College of Mechanical Engineering,Donghua University,Shanghai 201620;Sicher Elevator Co.,Ltd.,Huzhou 313009;College of Mechanical Engineering,Jiangsu University,Zhenjiang 212013;Shanghai Prismlab Electromechanical Technology Co.,Ltd.,Shanghai 201600)

机构地区：[1]东华大学机械工程学院,上海201620 [2]森赫电梯股份有限公司,湖州313009 [3]江苏大学机械工程学院,镇江212013 [4]普利生机电科技有限公司,上海201600

出　　处：《机械工程学报》2023年第1期286-297,共12页Journal of Mechanical Engineering

基　　金：上海市自然科学基金资助项目(22ZR1402400)。

摘　　要：针对目前亚像素微扫描的LCD式光固化3D打印技术在微纳结构增材制造中存在的典型打印瑕疵,通过优化打印工艺和分析打印结构,以提高打印成型质量和生产效率。首先,通过对打印材料后处理工艺研究,设计单因素试验并打印平板模型,分析后固化时长对零件硬度、粗糙度及形貌影响规律。其次,结合打印工艺参数,设计正交试验并打印圆柱阵列模型,分析打印层厚、曝光时间、振动次数对微圆柱成型的影响规律。结果表明:后固化时间在5~10 min时,后固化效果最优,此时表面粗糙度Ra值约为29 nm,邵氏硬度在88 HD左右。打印工艺参数对微圆柱直径尺寸影响大小排序为:曝光时间>打印层厚>振动次数。在均衡打印质量和打印效率的前提下,打印参数优化后,打印直径50μm,高度210μm的微圆柱结构应采用打印层厚10μm,曝光时间2500 ms,振动次数64 x的打印工艺参数。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 50μm and height of 210μm can be well printed under the print layer thickness of 10μm,the exposure time of 2500 s and the number of vibrations is 64 x.

关 键 词：光固化3D打印 微纳增材 后固化 工艺参数 

分 类 号：TG156[金属学及工艺—热处理]