关键词: 特征识别；中面；面－边属性图；面－边属性矩阵

Abstract:

The conventional feature recognition method was abandoned here and a method based on middle face model was proposed. Firstly, the appropriate method was proposed to represent middle face model, i.e. face-edge attribute graph and face-edge attribute matrix. Secondly, according to characteristics of molded product, features were classified into face feature, link feature and strengthen feature. Thirdly, based on analyzing topology and geometry characteristics of the faces, edge loops and edges in middle face models, feature recognition methodology based on middle face model was researched respectively. Lastly, algorithm implementation method and a case study were presented.

Key words: feature recognition, middle face, face-edge attribute graph, face-edge attribute matrix