GTFA-TIG焊送粉器内部气体流动的数值模拟  

Numerical Research of Inner Gas Flow of Powder Feeder in GTFA-TIG Welding

作　　者：李慧 时令 姚宇航 黄勇[2] LI Hui;SHI Ling;YAO Yuhang;HUANG Yong(School of Mechanical and Engineering,Ningxia Institute of Science and Technology,Shizuishan 753000,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730000,China;Shanghai Chenguang Medical Technologies Co.,Ltd.,China)

机构地区：[1]宁夏理工学院机械工程学院,宁夏石嘴山753000 [2]兰州理工大学材料科学与工程学院,甘肃兰州730000 [3]上海辰光医疗科技股份有限公司,上海200000

出　　处：《热加工工艺》2020年第3期146-149,153,共5页Hot Working Technology

基　　金：宁夏高等学校科学技术研究项目资助(NGY2017208).

摘　　要：传统A-TIG焊是通过焊前在施焊板材表面涂覆一层很薄的表面活性剂来引入活性元素。通过改变活性元素的引入方式,提出了一种新型活性TIG焊接方法-气体输送活性钨极氩弧焊,即GTFA-TIG焊(gas transfer flux activating TIG welding)。GTFA-TIG焊接方法通过保护气体送粉来代替焊前表面涂覆活性剂。利用FLUENT软件对GTFA-TIG焊的新型送粉器进行数值模拟分析。对不同毛刷转速下送粉器内部毛刷的气体流动进行模拟运算。结果表明:随着粉刷转速的增加,送粉器内部气体流动整体增加,对流也更加强烈,局部位置的速度发生变化并在内部形成涡流,影响了整体送粉过程。Active element is introduced by coating thin surfactant on the surface of welding plate in traditional A-TIG welding. By varying the method of introducing active elements, a new A-TIG welding named gas transfer flux activating TIG welding(GTFA-TIG) was proposed. In GTFA-TIG, the activating flux was introduced through protective gas powder feeding instead of coating surfactant before welding. FLUENT software was used to simulate the new type powder feeder of GTFA-TIG welding. Simulating calculation of gas flow of powder feeder at different rotational speeds of inner brush was carried out. The results show that with the increase of rotational speed of the brush, the gas flow inside the powder feeder increases, and the convection becomes intenser. The local velocity changes and the eddy current forms inside, which affects the whole powder feeding process.

关 键 词：活性剂粉末 GTFA-TIG焊 送粉器 FLUENT模拟 

分 类 号：TG444.74[金属学及工艺—焊接]