Data exchange from CAD to virtual assembly system based on XML

A feature-based integrated product hierarchical information model is presented to solve the model transformation problem between CAD and virtual assembly system.The model is created in product modeling system.Using XML-based neural file and triangle polygon model file,assembly information and geometry topology information contained in the model is transformed into virtual assembly system through data exchange interface.Virtual product model is re-constructed through mapping relations between polygons and geometry elements.The technique mentioned above solves data share problem between CAD and virtual assembly system.A prototype system is developed for verifying the feasibility of the technique.