1问题的提出合肥机务段现有内燃机车360余台,担负着上海局二通道和宁西线运输的重要任务。柴油机凸轮轴是机车柴油机供油、配气机构的重要配件,二根凸轮轴分别布置在机体左、右两侧,每根凸轮轴有四节轴段组成,每节轴段对应进排气凸轮、供油凸轮各两个,其性能的好坏直接影响柴油机工作状况。在轻微损坏情况下通过检修可修复,一旦故障扩大, 1 issue put forward Hefei engine depot existing diesel locomotive more than 360 units, responsible for the Shanghai Railway Station and the second channel Ningxiu important task of transportation. The diesel engine camshaft is an important part of the locomotive diesel engine oil supply and gas distribution mechanism. Two camshafts are respectively arranged on the left and right sides of the machine body. Each camshaft has four shaft sections. Each shaft section corresponds to the intake and exhaust cams , The two fuel supply cam, the performance of a direct impact on diesel engine working conditions. Repair in the case of minor damage can be repaired, once the fault is expanding,