为了研究电流脉冲频率对TIG焊电弧压力的影响,采用小孔探针法检测了TIG焊的电弧压力分布形式以及在不同电流脉冲频率作用下焊缝的熔深和熔宽.结果表明,TIG焊电弧压力曲线类似于正态分布曲线,电弧中心位置处的压力最大,越靠近边缘处压力越小.当在一定范围内增加电流脉冲频率时,曲线会发生横向收缩和纵向伸长现象,且TIG焊电弧压力的峰值以及焊缝的熔深均增加,而熔宽减小.因此,可以通过改变电流脉冲频率的方法来改变TIG焊的电弧压力. In order to study the influence of current pulse frequency on the arc voltage of TIG welding, the pore pressure distribution of TIG welding and the penetration depth and melting width of weld under different current pulse frequency were tested by the pinhole probe method. The results show that TIG welding The arc pressure curve is similar to a normal distribution curve with the maximum pressure at the center of the arc and the closer to the edge the lower the pressure. When the current pulse frequency is increased within a certain range, the curve shrinks transversely and longitudinally, and the TIG The peak arc pressure and weld penetration increase, while the weld width decreases, so the arc pressure of TIG welding can be changed by changing the current pulse frequency.