Automatic narrow-gap vertical welding method for ball valve

The invention discloses an automatic narrow-gap vertical welding method for a ball valve, belongs to the field of hydroelectric generating set equipment manufacturing, and solves the problems that in the prior art, the welding efficiency is low, and the welding quality is difficult to guarantee. According to the main technical scheme, existing narrow-gap horizontal welding is changed into narrow-gap vertical welding, and compared with a horizontal welding mode, fusion of welding seams and side wall metal is guaranteed more easily, and the qualification rate of the welding seams is greatly increased. And meanwhile, the laser tracking technology is matched with narrow-gap welding equipment, automatic welding and groove filling are achieved, and the production efficiency is greatly improved. 本发明公开一种球阀自动化窄间隙立向焊接方法，属于水电机组设备制造领域，解决现有技术焊接效率较低、保证焊接质量难度大的问题。本发明的主要技术方案是将现有的窄间隙横焊改变为窄间隙立向上焊接，相比横焊方式，更容易保证焊缝与侧壁金属的熔合，大幅提升焊缝合格率。同时采用激光跟踪技术配合窄间隙焊接设备，实现自动化焊接填充坡口，大大提高生产效率。