装载机机架多是一次焊接加工成形的，如果其上的轴孔磨损，则需要再次镗孔、配套，但因机器吨位重、工作量大，施工单位的维修设备又不能对其进行加工，若外协加工又需进行拆卸、起重、运输、划线和机加工等繁琐的工序，时间长、耗资大，在工程施工的紧急关头，将影响工程进度 Most of the loader frame is formed by a welding process. If the shaft hole on the loader is worn, it needs to be bored and matched again. However, due to the heavy tonnage and heavy workload of the machine, the construction equipment can not be processed by the maintenance equipment. If the outsourcing process also requires disassembly, lifting, transportation, marking and machining and other cumbersome processes, a long time, costly, at the critical juncture of construction, will affect the progress of the project