W-4单斗挖掘机是大型施工设备,在电站坝基施工中,放炮飞石将推压电机的端盖砸坏。有三处完全断裂(图1),断裂尺寸为200×45、140×45、140×45毫米,与端盖相连的油封盖被砸得粉碎。由于工程紧迫,在一时无法重新制作,工地又无热焊条件的情况下,采用铸408焊条冷焊修复了端盖。 W-4 single-bucket excavator is a large-scale construction equipment, dam construction in the power station, put a flying stone will push the motor cover smashed. There are three complete fracture (Figure 1), the fracture size of 200 × 45,140 × 45,140 × 45 mm, with the cover connected to the oil seal was smash smashing. Due to the urgency of the project, at a time can not be re-made, the site without hot welding conditions, the use of cast 408 welding cold welding repair end caps.