摘要
在熔融沉积(FDM)成型机的基础上,设计了一种适用于含溶剂的含能材料挤出成型的气压式喷头。利用了正交实验原理及有限元软件ANSYS/FLOTRAN,探讨了喷头的关键尺寸对挤出速度的影响规律,得出了各因素对挤出速度的影响程度,并建立了挤出速度与流道关键尺寸之间的指数预测模型,研究结果表明,最主要的影响参数为喷嘴直径大小,其次为成型段长度,入口收缩角等因素影响较小。所得指数预测模型与CFD计算值结果误差在8%左右,即可根据指数预测模型,通过调节压力大小来获取较为精确的挤出速度。
On the base of Fused Deposition Modeling（FDM）,design an air pressure extrusion system which applicable to solvent method energetic material. By using the Orthogonal Experimental principle and the FEA software named ANSYS/FLOTRAN. Discuss the effect of nozzle＇s key size on the extrusion rate,conclude the influence of each parameter on extrusion rate. Establish an index prediction model about extrusion rate and parameter of nozzle flow. The result show that the main parameter is nozzle diameter and then the length of forming station,entrance shrinking angle and others are less influencing. And its 8% deviation between index prediction model and CFD calculation value.So according to the index prediction model,it can get a precise extrusion rate by adjusting the pressure.
作者
丁骁垚
樊黎霞
陆星宇
DING Xiao-yao;FAN Li-xia;LU Xing-yu(School of Mechanical Engineering, Nanjing University of Science ＆ Technology, Jiangsu Nanjing 210094, China)
出处
《机械设计与制造》
北大核心
2018年第6期74-77,共4页
Machinery Design & Manufacture
