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一、前言超声波能对焊接质量产生一系列有利影响:清除铝及铝合金焊接表面的氧化膜;细化晶粒;消除气孔,这些早已被人们发现並利用于生产。1950年美国某研究单位引入20—22(?)的机械振动研究其对接触点焊质量影响,结果发现于焊接电流切断情况下,亦可形成剪切强度达数克的焊点,这一现象引起人们普遍注意。此后世界各国在这方面进行了一系列研究工作,发明了一种全新的压焊技术——超声波焊接。目前它已成功地应用于点焊、凸焊、缝焊。
I. Foreword Ultrasound can have a series of beneficial effects on the quality of welding: the removal of oxide film on the welding surface of aluminum and aluminum alloy; grain refinement; elimination of pores, which have long been discovered and used in the production. In 1950, a research institute in the United States introduced the mechanical vibration of 20-22 (?) To study its impact on the quality of the contact point welding. It was found that in the case of welding current cut-off, a solder joint with a shear strength of several grams could also be formed Aroused widespread attention. Since then, various countries in the world have carried out a series of research work in this field and invented a new pressure welding technology - ultrasonic welding. At present, it has been successfully applied to spot welding, projection welding, seam welding.