基于点匹配的变壁厚CAD模型中间面生成

Middle Surface Generation with Variable Thickness CAD Model Based on Point Matching

提出一种针对变壁厚模型的中间面生成方法。该方法包括运用基于样条链(环)的CAD模型过渡特征识别与抑制算法对初始CAD模型(B-Rep模型)的预处理、pair对生成以及基于等(变)壁厚模型的中间面生成算法。鉴于目前变壁厚模型处理中主要针对只有变壁厚平面pair对的变壁厚模型,研究了包含样条曲面变壁厚等各种情况,提出了基于surface点匹配和基于face点匹配的变壁厚模型中间面生成算法。模型测试结果表明所提出的算法具有较好普适性。

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 thick- ness, 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 univer- sal.