Virtual Assembly Method Based on Cad Model Reuse

摘要

Virtual assembly technology is applied to check the reasonability of product structure and the correctness of product assembly procedure in the virtual reality environment. In order to realize the assembly information acquirement, assembly sequence planning and assembly procedure checking, a virtual assembly method based on CAD model reuse is put forward. The layered assembly tree traveling algorithm is used to obtain the assembly levels, assembly relations and assembly constraints. The assembly matrix analysis method is applied to obtain assembly sequence of component and the final assembly sequence is compounded of assembly sequences of all components top-down. The imaginary projected profile sweeping method is proposed to check interferences among parts and it converts the dynamical assembly checking to the static. The proposed method also provides assembly information for other virtual reality systems. Finally, an application on wind turbine generator system verifies the effectiveness of this method.