The reasoning analysis of locating surface error of the jig in the machining processing

In the traditional analysis of the machining dimension accuracy influenced by the inaccurate error of locating pair in the jig and the common jig design,we often mainly consider the influence of the finish dimension that caused by the locating error in the direction of the finish dimension,but don’t have the quota to consider the synthetic influence of finish dimension caused by locating error in other directions.The article has carried on the quantitative and comprehensive analysis and computation about the synthetic influence of the finish dimen-sion caused by the moving error and the rotary error in the various locating surface in the jig by means of mathematics method and the theoretical mechanics knowledge,and also has established the available formula.