车轴轴端三螺孔位置度量规校准结果不确定度评定  

Evaluation of Uncertainty of Calibration Result of the Position Gauge for Three Screw Holes in Ends of Axle

作　　者：高蕾 王金秀 孟庆硕 GAO Lei;WANG Jinxiu;MENG Qingshuo

机构地区：[1]中国铁路北京局集团有限公司北京科学技术研究所,北京100036

出　　处：《铁道技术监督》2023年第9期15-18,共4页Railway Quality Control

摘　　要：车轴轴端三螺孔位置度量规(以下简称“位置度量规”)是用于测量车轴轴端三螺孔位置度的计量器具。为了确保位置度量规量值准确可靠,应根据JJF (铁总) 002—2017《车轴轴端三螺孔位置度量规》,采用位置度量规校准装置,校准位置度量规测量孔直径和3个测量孔的位置度。以GF2616-RD2型量规为例,介绍位置度量规测量孔直径和3个测量孔位置度的校准方法,建立数学模型,分析影响校准结果不确定度的因素,并分别评定测量孔直径和3个测量孔位置度校准结果的不确定度。评定结果表明,位置度量规测量孔直径和3个测量孔位置度满足计量性能要求。The position gauge for three screw holes in ends of axles(hereinafter referred to as"position gauge")is a metrology instrument used to measure position of three screw holes in ends axles.In order to ensure that the mea⁃surement value measured by the position gauge is accurate and reliable,the position gauge calibration device should be used to calibrate the measurement hole diameter of the position gauge and the position of the 3 measurement holes according to the JJF(TZ)002—2017 Position gauge for three screw holes in ends of axles.This paper introduces the calibration method of hole diameter and position degree with GF2616-RD2 gauge as an example,establishes the math⁃ematical model,analyzes the factors affecting the uncertainty of the calibration results,and evaluates the uncertainty of the calibration results of the measurement hole diameter of the position gauge and the position of the 3 measure⁃ment holes respectively.The evaluation results show that the measurement hole diameter of the position gauge and the position of the 3 measurement holes meet the requirements of measurement performance.

关 键 词：车轴轴端三螺孔位置度量规 校准 不确定度评定 测量孔直径 位置度 

分 类 号：U260.331.1[机械工程—车辆工程] TB921[交通运输工程—载运工具运用工程]