熔化极气体保护焊模型设计  

Pattern Design of Gas Metal Arc Welding

作　　者：吴静然[1] 

机构地区：[1]承德石油高等专科学校机械工程系,河北承德067000

出　　处：《承德石油高等专科学校学报》2015年第1期28-29,33,共3页Journal of Chengde Petroleum College

摘　　要：熔化极气体保护焊系统的理论模型发展迅速,已可预测阳极温度分布图、电弧长度和焊接电流等。该模型结合了移动熔化极一维热模型和电弧等离子二维模型,利用该模型可以计算焊接电流、焊接送丝速度和电源电压、相应类型的焊丝直径和保护气体之间关系。本实验用两种不同规格尺寸的焊丝(0.9 mm和1.2 mm),在工作电压为15 V的条件下进行,结果表明预测送丝速度的焊接电流显示与实验结果一致。A theoretical model of a gas metal arc welding system has been developed to make predic- tions of the anode temperature profile, welding are length and arc current. The model incorporates a one-dimensional thermal model of the moving consumable anode and a two-dimensional model for the arc plasma. The model makes it possible to calculate the relationship between the welding arc cur- rent, wire feed rate and the supply voltages, for various wire diameters and shielding gases. The pre- dicted welding current for a given wire feeding rate shows good agreement with our experimental ob- servation for operation in the spray transfer mode, for steel wire of two different diameters, assuming a workpiece sheath voltage of 15 V.

关 键 词：气体保护焊 模型设计 送丝速度 

分 类 号：TG4[金属学及工艺—焊接]