我厂生产的4102B曲轴,在精磨连杆轴颈后,要求各连杆轴颈和曲轴主轴颈中心线在同一平面内,测量时允差180°±20′,见图1。在此推荐一种精确度高,方便易行的方法,供参考。 1.测量步骤 (1)将曲轴的两端主轴颈置于V型铁上,用百分表将①、②连杆轴颈的最高点的假想连线调至与平台平行(因磨①、④连杆轴颈和②、③连杆轴颈分别在两个工序中,故可只需调①、②连杆轴颈),置百分表刻度 The 4102B crankshaft produced by our factory, after grinding the connecting rod journal, requires that the connecting rod journal and crankshaft main journal centerline should be in the same plane with the tolerance of 180 ° ± 20 ’, as shown in Fig.1. Recommend a high precision, easy and convenient method for reference. 1. Measurement steps (1) the ends of the crankshaft spindle placed on the V-shaped iron, with dial indicator ①, ② the highest point of the connecting rod journal hypothetical connection transferred to parallel with the platform (due to grinding ①, ④ connecting rod journal and ②, ③ connecting rod journal in two processes, respectively, it can only be adjusted ①, ② connecting rod journal), set dial indicator scale