金属微液滴竖直堆积成形工艺  

Process of metal droplet upright accumulation

作　　者：李素丽 杨来侠[1] 高扬[1] 徐超[1] 张文明[1] 卢秉恒[2] LI Suli;YANG Laixia;GAO Yang;XU Chao;ZHANG Wenming;LU Bingheng(Xi'an University of Science and Technology,Xi'an,710054,China;Xi’an Jiaotong University,Xi’an,710049,China)

机构地区：[1]西安科技大学,西安710054 [2]西安交通大学,西安710049

出　　处：《焊接学报》2020年第2期58-63,I0008,共7页Transactions of The China Welding Institution

基　　金：陕西省教育厅2019年度服务地方科学研究项目(19JC026)。

摘　　要：通过对金属微液滴竖直堆积行为的研究,探索不同成形工艺参数下,金属微液滴竖直搭接堆积、铺展形貌的变化规律,采用有限元模拟与试验验证相结合的方法,揭示金属微液滴在较大的温度梯度及较小的成形空间下竖直搭接堆积成形过程中,熔体喷射、堆积、搭接相互影响机制机理.结果表明,在金属微液滴竖直堆积过程中,熔体加热温度、基板与喷头的距离、扫描速度、扫描路径等工艺参数都会对成形零件的表面精度和内部质量产生很大影响,因此其工艺的匹配性研究对于提高金属微液滴堆积成形的3D打印零件精度和质量有很大的理论和实际指导意义.The vertical stacking behavior of metal micro droplet was studied to explore the vertical stacking and spreading morphology of metal micro droplet under different forming process parameters.The method of finite element simulation and experimental verification was used to reveal the metal droplet vertical under large temperature gradient and small forming space The results showed that heating temperature,distance between substrate and nozzle,scanning speed,scanning path and other technological parameters will have a great impact on the surface accuracy and internal quality of the formed parts in the vertical stacking process of metal micro droplet.Therefore,the research on the matching of the technology is of great theoretical and practical significance for improving the precision and quality of 3D printing parts with metal droplet stacking.

关 键 词：金属微液滴 竖直搭接 成形工艺 搭接率 平整度 

分 类 号：TG441.1[金属学及工艺—焊接]