高频脉冲微TIG焊接电弧基值效应研究  

Research on Base Value Effect of High-frequency Pulse Micro-TIG Welding Arc

作　　者：王燮阳 曹彪[1] 庞世炫 王奕楷 黄增好 WANG Xieyang;CAO Biao;PANG Shixuan;WANG Yikai;HUANG Zenghao(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,China;Guangzhou Jingyuan Electronic Equipment Co.,Ltd.,Guangzhou 510735,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640 [2]广州市精源电子设备有限公司,广东广州510735

出　　处：《热加工工艺》2024年第5期91-96,共6页Hot Working Technology

摘　　要：为了探索微TIG焊接的焊接电流下限,研制了一种高频脉冲微TIG焊接电源,利用脉冲基值电弧电特性的改善提高焊接稳定性。通过电弧电流、电压波形,分析了电弧的电压滞后性,探讨了脉冲频率对脉冲电弧基值效应的影响,并进一步对零基值脉冲TIG进行了研究。结果表明,高频脉冲下的微电弧基值电压较稳态电弧大幅下降,更有利于维持微电弧的燃烧;在基值电流为0 A的条件下高频脉冲电弧也可维持燃烧,平均焊接电流可低至0.5 A,极限0基值时间与脉冲电流大小呈正相关。对于微细漆包线和端柱的微型工件连接,零基值脉冲微TIG焊获得了较好的焊接效果。In order to explore the lower limit of welding current in micro-TIG welding,a high-frequency pulse micro TIG welding power source was innovated,the welding stability was improved by the improvement of characteristics of the pulse base arc.Through the waveform of arc current and voltage,the voltage hysteresis of the arc was analyzed,and the influence of the pulse frequency on the base value effect of pulse arc was studied,and the 0-base current,pulse TIG welding was further studied.The results show that compared with that of the steady-state arc,the base voltage of micro arc is sharply reduced under high-frequency pulse conditions,which is helpful for the sustainability of micro arc combustion.Additionally,under 0 A base current condition,high-frequency pulse arc can effectively maintain combustion,and the average welding current can reach as low as 0.5 A.The maximum 0-base current time correlates positively with the pulse current.0-base current,pulse TIG welding achieves good welding effect for the micro-workpiece connection between fine enameled wire and end post.

关 键 词：高频脉冲 电弧稳定性 微TIG焊 零基值脉冲 

分 类 号：TG444.7[金属学及工艺—焊接]