汽车车身激光焊接技术发展与应用

Application and development of laser welding technologies for automobile body-in-white

详细分析汽车车身激光焊接技术的发展与应用趋势,并对激光焊接光源的光学特性以及材料对激光的吸收特性等进行了分析。结合汽车车身产品特性与铝合金等新材料的应用与发展,对激光熔焊技术、填丝型激光熔焊技术激光钎焊技术以及激光+MIG复合焊接技术的原理、技术特点和应用特点进行了详细的对比分析,给出了针对不同产品结构与材料的合理的技术解决方案。基于对未来汽车车身发展的考虑和满足更高品质焊接车身质量的要求,提出了三光斑激光焊接技术及激光点焊技术等车身焊接技术解决方案,并对其焊接原理、技术特点和工艺特点进行了相应的分析与介绍。为未来汽车车身连接技术的发展提供了方向和建议。

The application and development trend of laser welding technologies for car body-in-white is analyzed in details,and the optical characteristics of laser welding light source and the absorption characteristics of different materials are studied. Combining with car body product characteristics and the application of new materials such as high-strength aluminum alloy,the relative principles,technical characteristics and application of laser welding technologies are introduced and compared,including laser fusion welding technology,laser fusion wire filler welding technology,laser brazing technology and laser +MIG hybrid welding technology. Based on the different product structures and material characteristics,the reasonable solutions of laser welding technology are provided from above mentioned laser welding methods. Considering the development of car body-in-white in the future and the requirements of higher quality welding body,the laser welding technology with three spots and the laser spot welding technology are proposed,and their welding principles,technical characteristics and technological characteristics are also analyzed and introduced. This has certain application value and guiding significance for future automobile body welding solutions.