Study on stable delivery of charged uniform droplets for freeform fabrication of metal parts  

作　　者：LUO Jun QI LeHua ZHOU JiMing XIAO Yuan YANG Fang 

机构地区：[1]School of Mechatronics, Northwestern Polytechnical University, Xi'an 710072, China [2]Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Xi'an 710072, China

出　　处：《Science China(Technological Sciences)》2011年第7期1833-1840,共8页中国科学（技术科学英文版）

基　　金：supported by the National High Technology Research and Development Program of China ("863"Program) (Grant No. 2008AA03A238);the National Natural Science Foundation of China (Grant No. 51005186);Foundation for the Author of National Excellent Doctoral Dissertation of China (Grant No. 2007B3)

摘　　要：Electrostatic delivery of charged uniform metal droplets is a novel method to deposit metal parts with short process period and low cost. But the delivery process is unstable and delivery accuracy of charged droplets deteriorates because of actions of mutual interactions of closely charged droplets. A droplet generator with droplet charging and deflecting system has been established to find out the way for stably and accurately deflecting droplets. The parameters for generating uniform droplets were first studied. Then the droplet deflections and metal parts depositions with different charge methods were discussed. The results show that the unbalanced electrostatic repelling forces are the main factor to cause the unstable deflection of droplets. The droplets deflection distance can be predicted and controlled by balancing the repelling forces of charged droplets. The metal parts are stably deposited after combining the board charged pulse and substrate motion, indicating that the work can provide useful theoretical and experimental guide for droplet-based freeform fabrication.

关 键 词：electrostatic delivery uniform metal droplets metal parts freeform fabrication 

分 类 号：TN141.32[电子电信—物理电子学] TG714.06[金属学及工艺—刀具与模具]