基于FLUENT的小型激光选区熔化设备气氛保护系统优化设计  

Optimal design of atmosphere protection system for selective laser melting device based on FLUENT

作　　者：付旺琪 李腾飞[1] 钱波[1] 李博 FU Wangqi;LI Tengfei;QIAN Bo;LI Bo(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学机械与动力工程学院

出　　处：《电焊机》2019年第9期78-83,共6页Electric Welding Machine

基　　金：上海市科技创新行动计划政府间国际合作项目(19110712500)

摘　　要：气氛保护系统是激光选区熔化(Selective Laser Melting,SLM)设备的重要功能单元,保证了SLM成型必需的低氧环境,直接影响SLM成型件的性能。针对提出的进气口数量和位置不同的4种方案,借助FLUENT软件模拟分析了保护性气体在成型腔体中的流场状态及其对SLM成型过程的影响,并确定了最优方案。结果表明:采用5个进气口,1个位于右后侧,4个分布在顶部,且分别按照进气量占比3/4、1/4时充气最快,对烟尘清除效果最好。Atmosphere protection system is a vital functional unit of selective laser melting(SLM)devices,which ensures the low oxygen environment necessary for SLM processing and affects the performance of SLM formed parts directly.The four options with different number and position of the inlets are simulated by FLUENT.The flow field state of the inert gas in the chamber and its influence on the SLM forming process are simulated,and the optimal option is determined.The results show that the shortest inflating time and the best dust removal effect will be obtained when adopting five inlets:one on the right rear side and four on the top of the chamber,and the intake air volume accounts for 1/4,3/4 of the total,respectively.

关 键 词：激光选区熔化 气氛保护系统 氧含量 FLUENT 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TH128[自动化与计算机技术—计算机科学与技术]