机车导板螺栓孔,厂修时大部分需要焊补后重新钻孔,以往采用甩去药皮的钢芯手工焊。由于导板孔深而小(Φ30毫米深70毫米),操作极为不便,常因夹杂而返工。因为这是机车车辆工厂焊修中的关键问题,我们进行了棒极电渣焊堵孔试验。投产一年的实践证明,质量良好,生产率比以前提高一倍以上。 Locomotive bolt holes, when most of the factory repairs need to repair and re-drilling, the past use of drug-coated steel core manual welding. As the guide hole deep and small (Φ30 mm deep 70 mm), the operation is extremely inconvenient, often due to inclusion and rework. Because this is a key issue in the welding of locomotive and rolling stock factory, we carried out a pole-plugging test of electroslag welding. The practice of putting it into operation for one year proves that the quality is good and the productivity more than doubled.