室温液态金属直写成型工艺研究  

Research on Liquid Metal Direct Writing Printing Process

作　　者：杨勇[1] 焦志伟[1] 杨卫民[1] 于源[1] 党开放[1] 马昊鹏 刘俊丰 YANG Yong;JIAO Zhiwei;YANG Weimin;YU Yuan;DANG Kaifang;MA Haopeng;LIU Junfeng(Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学,北京100029

出　　处：《有色金属工程》2020年第11期20-26,共7页Nonferrous Metals Engineering

基　　金：广东省省级科技计划项目(2016B090915001);2018年度珠海市产业核心和关键技术攻关方向项目(ZH01084702180085HJL)。

摘　　要：以液态镓金属为原料,采用直写打印方法,探究挤出速度、喷嘴高度、打印速度、打印温度等工艺参数对液态金属成型质量的影响,得到了各参数对成丝宽度尺寸及打印稳定性的影响规律。结果表明,喷嘴直径D=0.6 mm时:挤出速度Q=2 mm^3/s,喷头高度h=0.13 mm,打印速度v=40 mm/s,打印温度T∈(30℃,60℃)的最佳参数组合,可以打印出高精度的液态金属制品。提出液态金属直写成丝截面形态理论模型,对实验涉及参数归一化处理后得到归一化高度h*在(0.15,0.28)区间内与成丝尺寸成正线性相关,归一化速度V*在(0.109,0.202)区间内与成丝尺寸成正线性相关,并确定液态金属直写打印的稳定成型区间。The article use Gallium liquid metal as raw material,explore the direct writing process of gallium liquid metal,including the effects of extrusion speed,nozzle height,printing speed and printing temperature on the printing quality,obtained the influence of various parameters on the width of the wire and the stability of printing.The experimental results show that when nozzle diameter D=0.6 mm,high-quality liquid metal products can be printed under the optimal process parameters:extrusion speed Q=2 mm^3/s,nozzle height h=0.13 mm,printing speed v=40 mm/s,printing temperature T∈(30℃,60℃).Proposed the cross-sectional morphology theoretical model of the liquid metal wire and normalize the parameters.The results show that normalized height h*is positively linear related to the wire size in the interval(0.15,0.28),normalized speed v*is positively linear related to the wire size in the interval(0.109,0.202),and determined the stable forming interval of liquid metal direct writing.

关 键 词：液态金属 直写成型 工艺参数 成型质量 

分 类 号：TG146[一般工业技术—材料科学与工程]