3d Parametric Mechanical System Design Studies

The content of the dissertation is computer aided transmission design based on Unigraphics. The main contributions are included as follows: the first, the research of technology of parametric model and establishment of part library, the second, the study of the technology of automatic assembly, the third, the study of functions of Unigraphics and approach of quadratics exploitation of UG .Used this technology in transmission CAD system, the fourth, the establishment of the parametric transmission CAD system using technology of automatic assembly. It includes the soft and hard ware conditions, the design of system interfaces , the establishment of the parametric parts library of transmission and based on this , realization of automatic assembly.