近年来,由于综合机械化采煤的迅速发展,运输量日益增大,输送机应用愈来愈广。但是,由于托辊部件中的制造问题,不能稳定地保证精度要求,转动不灵活,动力消耗大,磨损加剧,寿命短,成本高。本文就管体两端同轴度问题进行分析,以探求图样上合理的标注,正确地选择加工和检验方法。 In recent years, due to the rapid development of mechanized coal mining, the volume of transportation is increasing day by day, the application of conveyor is more and more widely. However, due to manufacturing problems in the idler part, accuracy requirements can not be stably ensured, rotation is not flexible, power consumption is high, wear is increased, life is short, and cost is high. In this paper, the coaxiality of the two ends of the tube is analyzed to explore the reasonable labeling of the pattern and to select the correct processing and testing methods.