NC加工程式後處理的任務是將CAM軟體所產生的刀具路徑資料轉換成特定的五軸工具機進行加工時所需的NC加工程式碼。本論文主旨在使用3D實體模型來模擬五軸NC加工路徑後處理所產生的加工程式，研究事項包括：刀具路徑的座標轉換、刀具路徑不平順的修正及進給率的計算，其中座標轉換係採用球面雙圓法，刀具路徑不平順的問題是採用點資料插補的方式來解決，而進給率的計算則採用高速四軸NC加工之可變進給率的概念，最後將球面雙圓法、點資料插補及進給率進行整合，再透過3D實體模型模擬，就可以清楚的呈現五軸工具機後處理的運動情形。

The task of post-processing for a NC machining program is to convert cutter location data generated by CAM software into specific numerical control data as required by a 5-axis NC machine tool for the machining process. The purpose of this study is to use a 3D solid model to simulate the machining program generated in post-processing of 5-axis NC machining. Research issues include coordinate transformations of cutter paths, correction of unsmooth cutter paths, and calculation of appropriate feed rates for 5-axis machining. Wherein, a spherical two-circle method is adopted for coordinate transformations, an interpolation method is used to solve the unsmooth cutter path problem, and a variable feed rate concept used in high-speed 4-axis NC machining is adopted in calculating feed rates. Finally, the spherical two-circle method, the interpolation method and feed rate calculation are integrated, and through the simulation of tool paths using a 3D solid modeling system, the post-processing operations of a 5-axis machine tool are clearly presented.

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