Cylindrical part assembly precision analysis method considering shape deviation spatial distribution characteristics and local deformation

Aiming at the problem that the existing cylindrical part assembly precision analysis method does not consider the influence of shape deviation spatial distribution characteristics on the assembly precision, especially the assembly precision analysis accuracy is insufficient when the local deformation of a matching surface, different matching forms, contact positions and the uncertainty of a contact area are considered, the method is based on a non-Gaussian random field method. Different tolerance principles are considered, and a non-Gaussian skin surface shape model considering the surface shape deviation spatial distribution characteristics of the cylindrical parts is provided for shaft and hole parts respectively; on the basis of a cylindrical part non-Gaussian skin shape model considering shape deviation space distribution characteristics, a shaft-hole matching type distinguishing method considering shape deviation is provided, and a theoretical basis is provided for further analyzing shaft-hole part assem