目前,全国各机务段在检修柴油机主轴承螺栓和缸头螺栓的锁紧过程中,大多采用“扭矩法”,以风扳手、电动扳手和增力扳手来实现锁定。这种工艺方式不仅仅是工艺手段落后,而更主要的是表现在被紧固件锁紧力不均匀,且由于冲击力和冲击次数的差异不能满足设计拉伸量的要求,因而就难于保证柴油机检修质量以及可能出现的缸头变形、机体变形,造成烧轴、烧瓦、缸头裂纹和螺栓折断的弊端。 At present, most of the locomotive depots in the nation have used “torque method” to repair the main bearing bolts and cylinder head bolts of diesel engines, and the locking is achieved by wind wrenches, electric wrenches and booster wrenches. This process is not only behind the technological means, but more importantly, the fastener is shown in the uneven clamping force, and due to the impact of impact and the number of times the difference can not meet the design requirements of the amount of stretch, it is difficult to guarantee Maintenance of diesel engine quality and the possible deformation of the cylinder head, the body deformation, resulting in burning shaft, burning tile, cylinder head cracks and bolt defects.