五軸工具機實體切削模擬

Abstract

現今製造業五軸加工日趨重要，產品配合CAD/CAM軟體從設計端資料到製造端。在快速自動化電腦輔助設計製造的流程中，模擬驗證刀具路徑或工具機NC碼的正確性是必要的，而視覺化電腦虛擬實境切削更能讓使用者得到直觀地模擬效果。 本研究模擬五軸工具機切削環境，以voxel及適應性八元樹作為模型資料結構，利用APT刀具函數配合marching cube演算法，透過記憶體減量及避免重複運算的邏輯判斷，使系統效率提昇，達到即時切削顯示的效果。程式讀取刀具路徑、三軸或五軸基本構型之NC加工碼，並可輸入三角網格檔案作為預切粗胚，增加系統泛用性。

The 5-axis NC machining has been important issue in manufacturing today. Products are manufactured from designers to market with CAD/CAM software. In the process of the computer-aid design and manufacturing, it is necessary for NC tool path verification whether the cutter location data and NC code is correct or not. Computer visual reality cutting provides the user intuitively to get modeling correctness. This research simulates the cutting situation of 5-axis machining. The data structure is based on voxel and adaptive octree. Using the APT function with marching cube algorithm, the memory is reduced and logical determination can avoid the repeating calculations;Therefore, the system is increased in the efficiency and display on the real-time cutting situation. The program can read cutter location data, 3-axis or 5-axis NC code from various CAD file formate. The system can also be enhanced by using triangle mesh data as rough file input.