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阐述了用于铝合金焊接的中频脉冲ＭＩＧ焊逆变器的基本原理、特点和工艺效果。借助３１５Ａ场效应管式和６３０ＡＩＧＢＴ式弧焊逆变器，通过中低频调制把输出为８０ｋＨｚ和４０ｋＨｚ的脉冲频率，变成１ｋＨｚ以下的中频脉冲，对航天用铝合金板材进行ＭＩＧ焊工艺的试验研究。结果表明，该技术具有逆变式电源的高效省料轻巧等优点之外，它比现有的低频脉冲和直流ＭＩＧ焊技术具有更能保证熔透，“清洗”作用强，焊缝组织晶粒细化，微气孔倾向减少和接头强度高等突出优点，因此，具有很好的推广前景。
The basic principle, characteristics and process effects of IF MIG welding inverter used in aluminum alloy welding are described. With 315A FET and 630AIGBT arc welding inverter, the output frequency of 80kHz and 40kHz by low frequency modulation pulse frequency into 1kHz below the IF pulse of aerospace aluminum plate MIG welding process research . The results show that the technology has the advantages of high efficiency and light weight of inverter power supply, etc. Compared with the existing low-frequency pulse and DC MIG welding technology, the technology has the advantages of more penetrating penetration, stronger cleaning effect, Refinement, the tendency to reduce micro-pores and joint strength highlight the advantages, therefore, has a good promotion prospects.