本研究開發五軸加工系統搭配後處理加工程式，應用於石墨靶材之三維雕刻，進行排孔之形貌修正加工。修正加工即在錐孔之孔壁上進行斜向鑽孔，並藉由數值程式模擬錐孔孔壁之修正結果觀察其趨勢。
數值計算部分是利用一維熱傳計算雷射照射在石墨靶材上之內部溫度分布，再推算出不同能量對應之移除深度，接著引入不同角度計算靶材上單點光斑及能量吸收的變化。針對多發不同加工順序，改變其能量、重疊率之條件結果，觀察其孔壁形貌修正之結果，並針對其靶材上之能量分布進行討論。實驗加工部分，使用Nd-YAG雷射，藉由數控方式達到五軸自動化對位加工，並針對定位誤差進行座標系統之補償。最後將實驗加工的結果利用粗度儀進行孔形量測，並與模擬結果相互驗證，分析加工之形貌趨勢。
結果顯示，孔形修正角度在45°時有較佳之修正結果，多孔修正加工其加工順序不同時，其孔之形貌也隨之改變；加工之能量越強其孔深越深，其實驗與模擬之結果趨勢相符。

In this study, a five-axis processing system incorporated with postprocessor was carried out for morphology modification processing on drilling holes. Modification processing was made by means of oblique drilling in the walls and compared it with the results from the drilled wall simulated by numerical approach.

The numerical part is to use one-dimensional heat transfer to calculate distribution of internal temperature that laser irradiates on the target, further projected the removal depth corresponding to different energies, and then substituting different angles to calculate the change of energy absorption. For change of energy and overlapping ratio depending on versified processing sequence, the morphology results in the modifications of drilling hole on the graphite target can be observed. On the aspect of experimental processing, we used Nd:YAG laser and digital control unit to achieve five-axis alignment processing and compensated for the positioning errors. Finally the roughness measurement was carried out to verify the shape of hole with the results of the experimental and numerical works and to analyze the morphology trend of processing.

When the shape of hole is corrected at 45°, it generated better results in the modification. There is a versified processing sequence in the drilling hole modification; the stronger the energy processed, the deeper the hole and the shape matches the trend between the experimental and numerical results.

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