A Computer-aided Process Planning System for Feature-based Machined Parts

• Main Authors: Hui-Ru Chen, 陳惠如
• Other Authors: Feng-Cheng Yang;Yu-Chuen Yeh
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/96389569914058352100

碩士 === 元智大學 === 工業工程研究所 === 83 === An object-oriented computer-aided process planning system forfeature-based prismatic parts is presented in this thesis. The feature-based part model is created from a feature-base design subsystem of an integrated concurrent engineering system, named ICES. The presented system reduces the number of cutting blocks by eliminating the overlapped features cutting space that is resulted from feature overlapping in design phase. The system can be customerized by supplying various user- defined databases and knowledge bases to generate rofessional and pertinent process plan.According to a range specification for sharing tools, supplied by the users,the system thus assign several processes share the same tool to reduce tool changing. In this research, a hierarchial process planning framework, which emphasizes and generates information of intermediate workpiece shapes and specifications, is proposed. Based on the concept of swept volumes of tool movements, different machining process, and various tools, the system defines CutRegion3D class, ProcessManager class, and ToolManager class. ProcessManager class, and ToolManager class. ProcessManager class is designated to management each machining process. ToolManager class is designated for tool selection, which is proceded by analying shape and function of each feature. CutRegion3D class provides information and shape of intermediate workpiece during manufacturing process, which plays an important role in the related engineerings processes. The presented process planning system for prismatic parts is a sub-system of ICES, the integrated concurrent engineering system ,to facilitate concrrent engineering to reduce the lead- time of developing new products and avoid improper design.