摘要
在原有的金属微喷熔滴沉积成型的基础上,根据成型工艺原有的成型精度低、热变形大、成型质量一致性差等缺陷,结合电磁铸造工艺,提出一种新型的金属微喷熔滴电磁约束沉积成型3D增材制造方法。新方法通过改变金属熔滴的形貌,使熔滴搭接空隙减小。研究了金属微喷熔滴在小空间、大场强、大时间温度梯度环境下的电磁场约束流体流动行为。采用水平集方法追踪金属熔滴与空气的自由界面,分析了在外加电磁场作用下,金属熔滴的内部流动和外部形变的影响因素。
In order to overcome the shortcomings of original MDDM（Metal Droplet Deposition Molding） process （e.g. low precision, large thermal deformation, low forming quality consistency,etc.）, a novel method with electromagnetic confinement was proposed based on electromagnetic casting process. The advantage of the new method is to narrowthe gap between droplets by changing the morphology of the metal droplet. The electromagnetic field-constrained fluid flow behavior of metal micro-spray droplets was studied in conditions of small space, large field intensity, and large temperature gradient.By tracking the free surface of metal droplet exposed to atmosphere using level set method, the influencing factors of internal flow and external deformation of metal droplet were analyzed in external magnetic field.
作者
姚云飞
魏正英
杜军
赵光喜
YAO Yun-fei;WEI Zheng-ying;DU Jun;ZHAO Guang-xi(School of Mechanical Engineering,Xi＇an Jiaotong University,Shaanxi Xi＇an 710049,China)
出处
《机械设计与制造》
北大核心
2018年第12期109-112,共4页
Machinery Design & Manufacture
基金
国家重点研发计划专项(2016YFB1100400)
关键词
电磁约束
增材制造
熔滴形变
微孔隙
Electromagnetic Constraint
Additive Manufacturing
Droplet Deformation
Microporosity
