镀锌板的广泛应用给轿车白车身车顶与侧围的激光焊接带来了挑战,采用搭接方式是解决焊缝气孔等问题的最有效措施。针对目前激光搭接焊工艺参数复杂、研究不够全面的现状,以焊缝金相尺寸作为焊缝质量评价标准,采用二次响应面法研究激光束特征参数对焊接质量的影响规律,通过分析确定了关键工艺参数,并获得了最优焊接工艺参数以实现节能的目标。

The wide use of galvanized steel in automobile manufacturing brings much challenge to the laser welding process of roof to body-side. The fillet joint is the most effective way to solve the problem of welding pores in the process of laser welding. However,there is little research on this complicated joint process. Focused on this problem,taking metallographic size of welding seams as weld quality criteria,response surface methodology (RSM) is used to study the influence of laser beam on welding seam quality. Key welding process parameters and the optimum welding parameters are concluded.