近年來，五軸工具機在模具曲面與航太零件的加工上已有大量的應用。由於，五軸工具機在加工複雜曲面時，其各軸的運動情形很難藉由NC程式來判斷其正確性，加上五軸工具機價格昂貴，如果在加工時，發生碰撞或過行程的情形，其後果將不堪設想。因此，在實際加工前的製程驗證顯得更為重要。
本論文利用WTK函式庫開發了一切削運動模擬環境及介面，提供刀具相對工件與虛擬多軸工具機切削運動之模擬，工具機構型為工作台傾斜型之五軸雕模機，使用者可以藉由輸入CL File或NC程式來進行切削運動模擬，在運動模擬控制上，採用插值運算來產生虛擬多軸工具機的位置命令，其目的除了能正確呈現出工具機各軸的同動外，還能表現出真實工具機的進給，並計算所需之加工時間。此外，系統提供碰撞檢測功能，共有三種碰撞檢測模態可供使用者依照本身需求來選擇，而在切削運動模擬結束後，模擬視窗會呈現出加工後之工件外型。
本系統可以用來評估多軸工具機切削運動的正確性，在真實加工前，避免錯誤的製程規劃，進而降低生產成本及縮短製程時間。

Five-axis machine tools have been adopted in mold surface and aerospace part machining. Due to the kinematics complexity of the machine tool when machining complex surfaces, it is difficult to verify the correctness of the machining process directly from the NC codes. Errors in the NC code may cause problems such as collision, interference and out of workspace, which may cause damages in both workpiece and machine tool. To avoid these problems, verification of machining process before machining is important.
In this research, a virtual reality environment for machining simulation on rotary table type five-axis sculpture machine is developed based on the WTK library. The proposed software system is capable to simulate both the cutter location files and NC files. During simulation, tool motion and machine tool kinematics are both presented for the user to verify the machining process. The motion of machine tool is generated by a CNC interpolator which can create synchronized position commands based on specified feedrate, thus allowing the system to estimate machining time more accurately than commercial packages. Besides, three kinds of interference checking modes are available according to the requirements of the user. After machining, the final shape of the machined part is presented to the user.
The proposed system can be used to evaluate multi-axis machining process before execution of the machining process to avoid errors in the process planning and thus reducing the cost and time to market.

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