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为了保证蒸汽机车在架修之后,机车动轴轴距准确无误,在架修作业过程中,对车架、平楔铁、动轴箱进行投线。我段自1975年以来,根据前进型机车的特点,革新了投线工艺,提高了机车的架修质量。采用新的投线工艺后,轴距的成功率由80％提高到94％,托板返工率由20～30％下降到2～3％。同时,还有节省人力和材料等优点。具体的改革如下。
In order to ensure the steam locomotive after the repair, the locomotive axles wheelbase accuracy, repair work in the process of the frame, flat wedge iron, moving shaft box cast line. Since 1975, according to the characteristics of the forward-type locomotive, I have renovated the technology of the wire-casting and improved the quality of the locomotive repair. With the new wire-casting process, the success rate of wheelbase increased from 80% to 94%, and the rework rate of pallet decreased from 20% to 30% to 2% to 3%. At the same time, there are advantages such as saving manpower and materials. The specific reform is as follows.