关键词: 体重构, 过渡特征, 抑制算法, 特征简化, 计算机辅助设计

Abstract: To reduce blend features with complex boundaries in B-rep models, a novel algorithm for suppressing blends was proposed. This algorithm achieved suppression of blend feature by reconstruction and avoided directly processing the complex blend boundaries. In the course of suppress edge blends, blend volumes were firstly reconstructed and then combined with the original model by using Boolean operations. Through further local geometric analysis, not only the ordinary blends of minor radius but also the feature-intersected blends of major radius could be suppressed by this process. In addition, vertex blends suppression were realized by reconstructing vertex blends adjacent face boundaries. Experimental results demonstrated that the algorithm was effective in suppressing complex blends features of practical engineering models.

Key words: volume reconstruction, blend feature, suppressing algorithms, feature simplification, computer aided design