关键词: 中间面抽取, pair对选取, 变壁厚模型, 点匹配

Abstract:

An algorithm of mid-surface abstraction was proposed based on variable thickness model. This method included applying the algorithm of fillet recognition and suppression based on feature chain to the initial CAD model(B-Rep model) pretreatment, pair selection and invariable(variable) thickness model mid-surface abstraction algorithm. In view of the present research of the variable thickness model focused on the variable thickness model that just has plane variable thickness, this paper studied contained spline variable thickness etc., proposed the algorithm of middle surface generation with variable thickness CAD model based on surface point matching and face point matching, various kinds of situation. The model testing results show that the algorithm has universal.

Key words: mid-surface abstraction, pair selection, variable thickness model, point matching