一、前言中车公司所属北京二七轨道交通有限责任公司计量人经过近5年的潜心努力,成功研制了适用于生产现场的高精度大尺寸轴径测量用计量器具——“轴径微差测量仪”和大尺寸轴径测量尺。二、轴径微差测量仪1.结构创新“量身定制”带有“V”形定位装置的弓形测架,在 I. Foreword After nearly five years of painstaking efforts, Beijing Zhongqi Rail Transit Co., Ltd., a subsidiary of Zhongke Vehicle Company, has succeeded in developing high-precision and large-size measuring tools for measuring shaft diameters - Poor gauge “and large-size shaft diameter measuring ruler. Second, the shaft diameter differential measuring instrument 1. Structural innovation ”tailored “ with ”V " shaped positioning device arcuate measuring frame, at