Analysis and development of aluminum alloy resistance spot welding technology for car body

车身铝板电阻点焊技术发展趋势与分析 Analysis and development of aluminum alloy resistance spot welding technology for car body 钟丽慧 ZHONG Lihui 1 first-author 韩立军 HAN Lijun 1 郭院波 GUO Yuanbo 1 一汽-大众汽车有限公司 一汽-大众汽车有限公司 FAW-Volkswagen Automotive Co.,Ltd. FAW-Volkswagen Automotive Co.,Ltd. 介绍了铝点焊焊接技术的特殊性,设备的结构及特点,汽车车身对铝点焊技术在介质、材料、生产夹具及相关附属设备等方面的要求。通过对焊接设备电极极性、电源频率,电极帽端面形状和材料、焊接控制模式和焊接参数等进行分析测试,得出铝点焊质量的关键影响因素。确定了改善铝合金点焊质量、延长电极帽使用寿命的改进方向和思路,为汽车行业技术的发展提供经验与借鉴。 This article introduces the speciality of aluminum alloy spot welding technology,the structure and characteristics of equipment,and the requirements of aluminum alloy spot welding technology on media,materials,production fixtures and the related auxiliary equipment. The relevant factors influencing the weldability of aluminum spot welding were analyzed. The key influencing factors of aluminum spot welding quality were obtained,through the analysis and testing of equipment welding polarity, power frequency,end face shape and material of electrode cap, welding control mode and welding parameters,etc..It can provide the innovative directions and methods for improving the spot welding quality of aluminum alloys,prolonging the electrode caps life. It provides the experience for the development of technology in the automotive industry. 铝合金点焊 AMF压力控制模式 焊接参数 熔核 裂纹 aluminum alloy resistance spot welding AMF Mode-Force welding parameters nugget crack TG453.9;U466 2022-03-08 6 50