关键词: 工艺语义, 二维工序图, 特征识别, 三维工序模型重建, 证据理论, 相交特征, 铣削类零件

Abstract: To satisfy the enterprise's requirement for 3D process model，the feature recognition of 2D process drawing driven by process semantic was realized by using Dempster-Shafer (D-S) theory.This process was divided into two stages： searching potential features and verifying them.According to the machining feature's characteristics of process semantic，the potential features were obtained from process drawing，and the potential features were verified by D-S theory.When the confidence degree reached highest in current process semantic feature by potential feature，the feature was determined as the machining feature.For state of features interacting，a heuristic algorithm was used to determine basic surface of the feature.A part's process technology was taken as an example to verify the effectiveness and validity of this method.

Key words: process semantic, 2D process graph, feature recognition, 3D process model reconstruction, dempster-shafer theory, feature interaction, milling parts