中文字型平滑化應用於電腦輔助製造工程

Application of Smooth Engineering to Chinese Characters for the Computer Aided Manufacture

本研究主要是利用曲線數學理論方法，將各種現有中文字體或掃描文字圖檔轉換成可加工之數值化，利用MasteCAM模擬路徑後轉換成NC碼，再行加工。本研究克服了傳統上英文軟體無法用中文字型即時加工的缺點，並且只要是任何掃描物件的圖檔，均可進行平滑化，著實改善了許多現有電腦輔助製造之困難處。一般中文字型中之座標點僅限於局部，形成銳角現象。因此，欲使數值平滑化，可利用過濾法，斜率取點捨棄法，再利用spline來達成。本研究透過擷取字型的座標數字，利用各種軟體及開發的視窗程式來達成目地。針對座標數據，以曲線數學理論方法，經由自行撰寫的程式執行達到平滑曲線，再將平滑化結果執行AutoCAD腳本（script），轉成dxf檔，然後將dxf輸入MasteCAM進行刀具路徑模擬，最後將模擬結果轉成NCCode執行實務加工。本研究結果亦可應用於切割加工，放電加工，雕刻等。

This research is intended to extract outline paths from Chinese characters or scanned characters by a specifically developed method. To obtain the outlines of Chinese characters, a radial scan-connection method was designed by decoding the input file. The extracted paths were then converted into numerical coordinate data and were smoothed by using the Bezier Spline method. It is essential to realize that some peculiar data that smear the original data can be filtered out by applying some mathematical algorithms. Consequently, the generated data file can be run on AutoCAD tool script and be exported as a dxf file for application with computer software such as MasterCAM to perform the emulation of a milling path. At this stage, the emulated result can be transferred into NC code to achieve real milling. The proposed method solves the problem of conventional English CAM software that is unable to mill Chinese characters in real displays. In addition, it is noticeable that the current method can be also applied to scanned maps with the same success. The further application of this research is that the developed method can be applied to wire saw machines, electric discharge machines, and engraving machines, especially for personalized signatures or unique characters.