摘要
为了获得一种匹配3 kW宽带矩形激光器的同轴送粉喷嘴,采用了Fluent软件的离散相模型,对同轴送粉喷嘴粉末通道结构参数开展了四因素四水平的正交仿真试验,研究了结构参数对粉末汇聚浓度与粉斑尺寸的影响。结果表明,宽带同轴送粉喷嘴的粉末浓度在轴向与径向上均服从高斯分布,验证了喷嘴结构的合理性。四因素对粉末浓度的影响效果从大到小为:倾角、垂直高度、收缩角度以及出口间隙。当采用最优结构参数时,喷嘴可以在距离粉末出口24.6 mm的平面上形成一个3.08 mm×3.08 mm大小、最高质量浓度为32.29 kg/m3的矩形粉斑。最终通过送粉试验验证其合理性,为后续激光增材制造试验的开展提供依据及参考。
In order to obtain a coaxial powder feeding nozzle matching a 3 kW broadband rectangular laser, the discrete phase model of Fluent software was used. Four factors and four levels of orthogonal simulation experiments were carried out to study the influence of the structural parameters on the concentration of the powder and the size of the powder spots. The results show that the powder concentration of the broadband coaxial powder feeding nozzle obeys the Gaussian distribution in the axial and radial directions, which verifies the rationality of the nozzle structure. The effects of the four factors on the powder concentration from large to small are: inclination angle, vertical height, contraction angle and outlet gap;when the optimal structural parameters are used, the nozzle can be formed a rectangular powder spot with a size of 3.08 mm×3.08 mm and a maximum density of 32.29 kg/m3 on a plane that 24.6 mm away from the powder outlet. In the end, the powder feeding experiment was carried out to verify its rationality, which provided a basis and reference for subsequent laser additive manufacturing experiments.
作者
赵亮
王丽芳
朱刚贤
李广琪
石世宏
Zhao Liang;Wang Lifang;Zhu Gangxian;Li Guangqi;Shi Shihong(School of Mechanical and Electric Engineering,Soochow University,Suzhou,Jiangsu 215021,China;Engineering Training Center,Soochow University,Suzhou,Jiangsu 215021,China)
出处
《应用激光》
CSCD
北大核心
2021年第3期643-650,共8页
Applied Laser
基金
国家重点研发计划(2016YFB1100300)。
关键词
激光增材制造
宽带同轴送粉喷嘴
离散相模型
正交试验
laser additive manufacturing
broadband coaxial powder feeding nozzle
discrete phase model
orthogonal experiment
作者简介
赵亮(1994-),男,硕士研究生。研究方向:激光金属增材制造技术。E-mail:1269957916@qq.com;通信作者:王丽芳(1979-),女,硕士,实验师。研究方向:激光增材制造技术数值模拟。E-mail:lfwang@suda.edu.cn。
