Research on Parametric Modeling Method of Product Based on Directed Graph

The parametric model of product is the foundation of implementation product series design. In order to solve the data conflict problem of product series design in the process of parametric modeling, a parametric modeling method of product was proposed based on the directed graph. Product, components and parts was expressed by vertex, and the driven relationship of parameter for model was expressed by directed edge. The process of product parametric design was analyzed and reconfigured by the structure directed graph of product parametric model. The structure directed graph of product parametric model was divided into a number of sub-graphs, and those sub-graphs were combined to directed trees of the parametric model of product. The parametric model of product was achieved to support product series design. So product parameters was droved from top-down so as to improve the efficiency of modified and reuse of parametric model of product and convenient to operate within the model. As an example, the series design of the Gatling gun proved the applicability and effectiveness of the method, and the method can meet with product series rapid design