关键词: 计算机辅助工艺设计, 工序模型, 特征识别, 加工元, 模糊C-均值聚类, 产品开发

Abstract: By analyzing the existing problems of process planning based on three-dimensional model, definition of process model was introduced into the process planning, and a process planning method driven by process model was put forward. Contrary to traditional method, this method generated machining process from part design model to blank model, in each designing process, a process model was generated, and then the next process based on this process model was designed until the whole process planning was completed. In the procedures of the method, machining feature recognition, machining element generation and machining element cluster were the key elements to influence the automatic process planning. Therefore, a further study on hybrid interactive feature recognition based on process model, a machining element generation method based on knowledge and a machining element clustering method based on fuzzy C-means were implemented. An example of complicated airplane part was taken to discuss the application procedure of the proposed method, which provided a new theory for the process planning based on three-dimensional model.

Key words: computer aided process planning, process model, feature recognition, machining element, fuzzy C-means clustering, product development