Research on Base Value Effect of High-frequency Pulse Micro-TIG Welding Arc
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.
high-frequency pulsearc stabilitymicro-TIG welding0-base current pulse
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