关键词: 工艺信息重用, 加工特征匹配, 层次化模型, 拓扑关系

Abstract: To meet the requirements of adding process information conveniently and accurately,the method of reusing process information based on machining feature was proposed.The hierarchical expression model of process information was created by using object-oriented method.The processing knowledge unit was divided into three layers to be organized and managed,which were feature layer,machining layer and element layer.The associated mechanism between predefined machining feature and process information was created to ensure the accuracy of process information.The expression and organization method of feature was constructed by analyzing kinds of geometry information and boundary attribute information of predefined machining feature.The process information was achieved to be added rapidly by using matching strategy of machining feature.The validity of the proposed method was verified by the applications.The proposed method could be used as the basis of reusing and accumulating the process information and could promote the development and application of the intelligent process planning.

Key words: reuse process information, match machining feature, hierarchical model, topology relations