Statistical Tolerancing for Combinations of Coaxial Features and Clearance Fits

摘要

A method for statistically tolerancing the eccentricity of a mechanical assembly consisting of coaxial components has been developed. The method provides for a linear combination of variances of coaxial features within components and clearance fits between components. The resulting predicted tolerance of assembly eccentricity includes variation introduced by the manufacturing processes and by the assembly processes. Various conditions and the associated assumptions for both coaxial features and clearance fits are provided. Some application details are discussed.