轮式工程机械驱动桥因载荷大、无减振装置，所以常造成桥的两端瞬间疲劳断裂。我们在修理实践中，因桥的损坏情况和设备条件的不同而采用了3种不同的焊接修复工艺，均收到了良好的效果。1．木芯定位、对称焊接修复工艺如果断裂部位的内孔两侧分别有20mm以上的加工过的同径长度 Wheeled construction machinery drive axle due to load, no damping device, so often caused instant fatigue fracture at both ends of the bridge. We in the repair practice, due to the bridge damage and equipment conditions and the use of three different welding repair process, have received good results. 1. Wood core positioning, symmetrical welding repair process If the fracture site on both sides of the hole have a diameter of 20mm or more processed with the same length