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本文从生产应用的实际出发,对抽头式调压,磁放大器式调节,自、调电感式三种CO_2半自动焊机的工艺性能(引弧性能、电弧声音、飞溅情况、焊缝成型)作了定性比较和分析,并摄制了小规范和中等规范的电流和电压波形图。本文认为中等规范焊接时,为获得平坦的焊缝,短路频率控制在30～50次/秒为宜。回路中电感量应选择得大一些。但电感量大时会造成引弧困难,此时如在电感两端跨接电阻,则可以控制短路电流有较徒的前沿和较缓降的后沿,这种波形对引弧及飞溅都有艮好的控制效果。
In this paper, from the practical application of production, the process performance (arc performance, arc sound, splashing and weld seam formation) of three types of CO_2 semi-automatic welding machines with tap voltage regulator, magnetic amplifier type adjustment and self-tuning and inductive inductance Qualitative comparison and analysis, and filmed small and medium-sized current and voltage waveforms. This paper argues that for medium-standard welding, in order to obtain a flat weld, the short-circuit frequency is controlled at 30-50 times / second. Circuit inductance should be selected larger. However, when the inductance is large, the arc will be difficult. At this moment, if the resistance is connected across the inductor, the short circuit current can be controlled to have a forward edge and a gentle falling edge. This waveform has both arc and splash Burgundy control effect.