Pitch diameter measuring of thread ring gauge and uncertainty evaluationTONG Yan Sichuan of Institute Aerospace Measurement And Testing,Chengdu 610000,ChinaAbstract:To solve the problem of that thread gauge verification can not cover all kinds form of the thread gauge, the author measured the pitch diameter of thread ring gauge with mahr length measuring machine and its accessories in “double sphere” method, giving particular steps and notices of measurement by the basic theory of “three-wire” and “double sphere” method. At same time the uncertainty of this method has been evaluated. The experiment indicated that it can meet the requirement of general using of thread ring gauge, having the characteristics of “high measuring precision, convenient operating and high reliability” etc.[著者文摘]
