关键词: 圆角特征, 截面线, 特征识别, 特征抑制, blend feature, cross-section curve, feature recognition, feature suppression

Abstract: Based on the curvature of crosssection curves, an improved blend feature recognizing and suppressing method was proposed. Firstly, all edgeround faces and vertexblend faces in the model were recognized, and then the adjacent recognized faces were combined together as a blend feature. Secondly, all recognized blend features were suppressed as a whole. By extending the support faces of the blend feature, the point of the blendvertex and the curve of the blendedge in the suppressed model were found from the intersection between the extended faces. The topology of the original model was modified to build the suppressed model. The proposed method can recognize and suppress the blend feature with constant and variable radius of solid model with freeform surfaces, and extends the application range of current approaches. Experiments show that the proposed method is effective and feasible.