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一、引言在铝合金结构中应用最普遍的焊接工艺是正弦波交流钨极氩弧焊。国外近几年来在这方面的一项重要发展是用矩形波交流氩弧焊代替正弦波交流氩弧焊,其频率、正负半波通电时间及幅值皆可调。这种工艺不但在
I. INTRODUCTION The most common welding process used in aluminum alloy structures is sine wave AC TIG welding. An important development abroad in recent years in this area is the use of rectangular AC arc welding instead of sine wave AC TIG welding, the frequency, positive and negative half-wave power time and amplitude can be adjusted. This process is not only there