转向架装配制造中的定位焊

摘要

根据定位焊热输入低、焊接拘束度大和焊缝起弧点与收弧点接近等工艺特点,结合行业标准和生产实践阐述了转向架装配制造过程中定位焊的工艺要求和实施要点,详细论述了定位焊人员资质、焊接工艺规范、焊缝尺寸、焊缝修磨和检验的具体要求和注意事项.着重指出定位焊操作人员应具备相应的焊工考试证书和一定的焊接技能水平,定位焊预热应严格执行,必要时应通过改进结构和优化工艺以满足预热要求,定位焊两端应磨削成缓坡状,使之能与最终焊缝良好地结合,避免最终焊缝产生未熔合、未焊透,以及表面成形不良等缺陷.%This article according to the positioned welding lower heat input,bigger welding restricting and the welded joint has the arc igniting and arc crater close and so on,the union profession standard and the production practice elaborated in the bogie assembly process of manufacture the positioned welding technological requirement and the implementation main point,elaborated the tack welding personnel intelligence,the welding process standard,the weld size,the welded joint sharpening and the examination specific request and the matters needing attention in detail. Finally pointed out emphatically that the positioned welding operators should have the corresponding welder to take a test the certificate,has certain welding skill level,the positioned welding preheating should fulfill exactly,when necessity satisfies the preheating request through the improvement structure and the optimized craft,the postioned welding both sides should the grinding become the gentle slope shape,enables it to unify good with the final welded joint,in order to avoid the final welded joint does not have lack of fusion,no lack of the penetration,as well as superficial formation bad and so on.