Through the analysis of familiar faults in borings machine tool maintenance, discussion is made on how to prolong the service life of parts structures by renewing material and improving machinery.

• 结合实践,对金属切割机床维修中常遇到的问题进行了论述,从材料选用和改进零件结构两个方面对机床零件的寿命使用问题进行了论述。