关键词: 大壁厚；坡口结构；焊接参数设计；熔深控制；焊偏；降本增效

Abstract: The groove structure of the butt circumferential weld of axle head of an axle housing is optimized and analyzed. Combined with the actual welding process, different parameter groups are designed for welding test. Through the weld section inspection and physical and chemical analysis, the best welding break structure and welding parameter matching are obtained. Eliminate the root non fusion defect caused by welding deviation, ensure the minimum penetration value of the weld, and solve the problem of after-sales weld fracture. By optimizing the welding process parameters, clarifying the welding process control measures and methods, and applying them in mass production in actual production, the welding process cost is decreasing and the welding production efficiency is increasing.

Key words: Large wall thickness; Groove structure; Welding parameter design; Penetration control; Welding deviation; Cost decreasing and efficiency increasing