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
王燮阳 1曹彪 1庞世炫 1王奕楷 1黄增好2
作者信息
- 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
- 折叠
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0A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.
Abstract
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Key words
high-frequency pulse/arc stability/micro-TIG welding/0-base current pulse引用本文复制引用
出版年
2024
NETL
NSTL
万方数据