Research Progress of Ultrasonic Spot Welding of Metals
PENG He1, CHEN Daolun2, JIANG Xianquan3,4, BAI Xuefei1
1 College of Engineering Technology, Southwest University, Chongqing 400715, China 2 Department of Mechanical and Industrial Engineering, Ryerson University, Toronto, ON M5B 2K3, Canada 3 College of Materials and Energy, Southwest University, Chongqing 400715, China 4 Center of New Material Science and Technology Research Institute, Chongqing 400715, China
Abstract: Ultrasonic spot welding, as a solid-state welding technique, has attracted the attention of scientists and industry owing to its superiority of small affected zone, high welding strength, low energy consumption and excellent electrical conductivity of joints. However, this technique also has some obvious defects. With the workpiece thickness and hardness increasing, the welding system will become unstable and require greater surface grip and welding power. On the other hand, when conducting a dissimilar welding, the interfacial mechanical properties are susceptible to the generation of intermetallic compounds by interfacial diffusion. In the past few years, researchers attempted to develop the ultrasonic spot welding technique mainly by optimizing welding tools to improve the surface grip, creating high power ultrasonic spot welding equipment to improve stability, deeply studying welding bonding mechanism, and implanting intermediate layer to inhibit the diffusion layer. Up to today, high power ultrasonic spot welding has become the research focus and the object of the research has changed from wire and foil to sheet with a certain thickness and hardness. The key research issues include optimization of welding tooth profile, resistance heat assisted ultrasonic welding, ultrasonic softening theory and microwelds expansion theory, the strengthening mechanism of intermediate layer, etc. A series of achievements help enhance the mechanical properties of ultrasonic joints and further the industrial application of this technique. This review on ultrasonic spot welding technique mainly includes the principle and characteristics of ultrasonic spot welding, the optimization and improvement of welding tools, the bonding mechanism of welding interface, the simulation of welding interface temperature, and the process, structure and performance of welding.
作者简介: 彭和,讲师,2019年获西南大学博士学位。目前主要研究领域为超声波点焊,先后发表相关SCI/EI论文5篇。 蒋显全,西南大学材料与能源学院二级教授、博导。1992年获中南工业大学硕士学位,2006年获四川大学博士学位,在Acta、Journal of Alloys and Compounds、Materials and Design、Materials Science & Engineering A等杂志发表论文75篇,其中被SCI和EI收录51篇;申请专利71项;获省部级科技奖励一等奖2项,二等奖4项,三等奖4项,其他科技奖励若干。 陈道伦,加拿大工程院院士(FCAE),加拿大矿业、冶金和石油协会会士(FCIM),英国材料、矿物和采矿协会会士(FIMMM),加拿大多伦多瑞尔森大学机械和工业工程系教授。1989年获中国科学院金属研究所博士学位,1993年获得奥地利维也纳大学博士学位。陈博士在先进材料和关键工程材料的变形、疲劳、焊接等领域发表了385篇同行评审论文,撰写了193篇非同行评审会议论文和研究报告。
引用本文:
彭和, Chen Daolun, 蒋显全, 白雪飞. 金属材料超声波点焊研究进展[J]. 材料导报, 2020, 34(11): 11064-11070.
PENG He, CHEN Daolun, JIANG Xianquan, BAI Xuefei. Research Progress of Ultrasonic Spot Welding of Metals. Materials Reports, 2020, 34(11): 11064-11070.
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2020, Vol. 34 
