GTA焊枪套筒直径对保护效果影响的数值分析  

Numerical simulation of influence of diameters of GTA welding torch on protective effect

作　　者：樊丁[1] 杜华云 张瑞华[1,2] 黄岸[1,2] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料国家重点实验室 [2]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《电焊机》2004年第11期33-35,51,共4页Electric Welding Machine

摘　　要：GTA(GasTungstenArc)焊接时保护气流流场的数值分析对于焊枪的设计提供了新的思路。针对不同直径的套筒建立了三维稳态的对称模型,研究了套筒的保护气体的流体流动,计算了速度场的分布情况。控制方程的求解采用以SAMPLE算法为基础编写的通用热流计算软件—PHOENICS。通过计算得到不同直径套筒下的流体速度轮廓、速度矢量和保护气在试板表面速度分布的分析,得出了套筒直径设计最佳取值范围并和通常的实践结果吻合良好。Mathematical model and analysis of the protective effect of TIG welding is adopte for torch design.In this paper,a steady three-dimensional(3D) symmetric model is developed for investigating the fluid flows,and the velocity profiles around the torch is calculated.The control equations was solved for using the general thermofluid-mechanics computer program,PHOENICS code,which is based on the SAMPLE algorithm.Analysis have been made for the calculated fluid profiles,vectors and the velocities over the steel plate.A optimal range of diameter in the theory of welding torch design has been obtained,which matches the actual trsults very well.

关 键 词：套筒直径 保护效果 数值模拟 

分 类 号：TM15[电气工程—电工理论与新技术]