A Machining Feature Oriented Process Planning System

• Main Authors: Cheng, Chang-Tzy, 鄭昌孜
• Other Authors: Pemg, Der-Baau
• Format: Others
• Language: zh-TW
• Published: 1992
• Online Access: http://ndltd.ncl.edu.tw/handle/61080223418299160457

碩士 === 國立交通大學 === 工業工程研究所 === 80 === 　　The techniques of CAD and CAM are getting mature recently while there are still exist some problems in integrating CAD and CAM. The main problem is that the machining information provided by CAD is insufficient. Most of current reseaches use the machining features as the media to transfer the machining information from CAD. Then some software interfaces and mchining databases are used to transfer the machining features dirrectly into CAM for the goal of Computer-Integrated-Manufacturing (CIM). 　　Such softwares are often called CAPP system. The main functions of CAPP include:(a)finding the required machines, tools , fixtures, cutting paths, and parameters of the machining operations planing; (b)deciding the precedence constraints of the operation plannings. 　　In this pater, we focus on the machining process of cutting and use the DSG data, a kind of machining features, as input. to finding an approprate process planning. Through the feature refinement process of feature digraph construction the DSG features are first transferred into corresponding machinable refined feature. Under the consideration of the tool bases and the machine capabilities, the proposed system can determine the machining information of (a) the refined features (b) the machinability of machining features and (c) the cutting direction. Such information can be used to decide the required machines, tools and the machining sequences. The proposed system can also generate the Nc paths of the input DSG data for verifying the feasiblity of the outputted process plan.