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在机车车辆检修工作中,各零部件由于磨耗过限或组装镶配的需要,往往必须堆焊各种大直径的圆孔以减小内径。例如摇连杆套孔,十字头圆肖孔与勾贝杆镶装孔,以及轮心的轴孔和曲拐肖孔等,都是任务量大且相当繁重的焊修工作。目前除了焊货车轮心轴孔有的工厂采用埋弧自动堆焊方法外,很大一部分大直径圆孔的堆焊工作,仍不得不用手工焊法来完成。因
In the locomotive vehicle maintenance work, due to wear and tear of the various components or assembly of the assembly needs, often have to build a variety of large diameter round hole to reduce the diameter. For example, the rocking rod sleeve hole, the crosshead small hole and the hook rod mounted hole, and the wheel center hole and crank Shaw hole and so on, are heavy task and very heavy welding repair work. At present, in addition to the welding wheel mandrel hole some factories use submerged arc welding method, a large part of the large diameter hole welding work, still have to use manual welding method to complete. because