加工特征, 特征识别, 轻量化模型, 边界表示, 属性邻接图

To extract machining feature from lightweight model effectively, after analyzing the data structure of lightweight model, a feature-oriented lightweight model was established, and a machining feature recognition method based on lightweight model was proposed. Firstly, the boundary representation(B-rep) of the lightweight model was set up by designing the algorithm of extracting geometrical information from lightweight model. Then the AAG was constructed by giving a method of judging adjacency relationship between surfaces. And then a new AAG decomposition method was put forward, which successfully resolved both protrusion features and depression features. Finally, a sample application was developed to illustrate the feasibility and validity of the method proposed. 

machining feature, feature recognition, lightweight model, boundary representation, attributed adjacency graph(AAG)