| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 107 === Computer-aided manufacturing (CAM) software is commonly used in the manufacturing industry to help the programming of computer numerical control (CNC) machines. With the advancement of technology, CAM software contains many kinds of methods to improve the machining efficiency and quality, and the software companies are constantly developing and optimizing new tool path strategies. Although there are abundant options to finish the programming, it still depends on the engineers’ experience to decide the combination of cutting parameters and strategies. Therefore, this study developed an automatic tool path planning system based on the CAM software, NX, which is developed by Siemens AG. The developed system included variety of commonly used cutting strategies, tool database, and geometry recognition functions. In this system, the cutting area recognition function first classifies the geometry, and then automatically selects suitable cutting tool and cutting parameters according to different materials, processes, and cutting areas. The cutting strategies and operations are then automatically planned. In order to shorten the cutting duration of roughing and semi-finishing operations, a set of tool path planning results will be compared using Dijkstra's algorithm and Greedy algorithm. The combination of roughing and semi-finishing operations with the shortest operation time will be selected by the developed system to confirm the production efficiency.
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