关键词: 特征识别, 规则窄深特征, 模具, 计算机辅助设计

Abstract: There are usually some long narrow-deep areas in mold needed to be specially machined. To identify the narrow-deep areas automatically, an automatic approach of recognizing regular narrow-deep feature was proposed which combined the hint-based method and volume decomposition method. Firstly, the narrow-deep feature was defined. Then, by making use of the characteristics of regular narrow-deep feature, feature hint was extracted from the mold, and the elementary extended volume of feature was generated from the feature-hint. Furthermore, the feature was recognized incrementally by subtracting the elementary extended volume through geometrical reasoning, and basic narrow-deep features were combined heuristically. Finally, an example was adopted to verify the proposed method. In this research, an intelligent connection between CAD and CAPP for machining narrow-long-deep areas in mold was set up through automatic feature recognition.

Key words: feature recognition, regular narrow-deep feature, mold, computer aided design