摘要
针对动车组铝合金车体平顶焊接易出现焊缝未熔合、焊缝根部裂纹以及变形难控制等问题,分析了造成动车组铝合金车体平顶搭接焊缝未熔合、根部裂纹及易变形的原因,优化了原有的焊接工艺参数和平顶焊接变形控制方法。结果表明,优化后的焊接工艺有效地解决了动车组铝合金车体平顶焊接易出现焊缝未熔合和焊缝根部裂纹的问题,动车组铝合金车体平顶焊后整体平面度控制在3 mm以内,满足使用要求,有效保证了车体平顶的焊接质量。
For welding of flat-roof in aluminum alloy car body of EMU,there are some defects such as incomplete fusion,cracks in the weld root and welding deformation in weld bead. So the causes of welding defects were studied in welding process of flat-roof in aluminum alloy car body of EMU,the welding parameters and control method of welding deformation were optimized. The results showed that the optimized can prevent welding defects such as incomplete fusion and root weld crack,and the overall flatness of the EMU Aluminum Alloy body flat can be controlled in less than 3 mm,the welding quality of body flat is effectively guaranteed.
出处
《焊接》
北大核心
2017年第12期44-47,共4页
Welding & Joining
