葉輪(Impeller)為航太工業、能源工業與精密機械工業中的關鍵零組件。在考量高精度及結構完整性下，會選用切削加工來製造。葉輪的幾何外型複雜且具有高度的干涉程度，因此多軸加工技術為不可或缺的技術。

本論文的目的在改善葉輪之加工路徑，包含點加工刀具姿態之平滑化、B-Spline刀具路徑以及側銑加工路徑之建構。經由實際加工試驗發現：藉由刀具姿態平滑化處理，可得到較好的加工表面與較少的加工時間；B-Spline路徑之建構，可減少加工程式碼所需的記憶空間及減少加工所需時間。側銑刀具路徑之建構，可改善加工表面的粗糙度。

Impellers are important components in the field of aerospace, energy technology, and precision machine industries. Considering the high accuracy and structural integrity, impellers might be manufactured by cutting. Due to their complex geometries and high degrees of interference in machining, multi-axis machines are requested to produce impellers.

The object of this thesis is to improve 5-axis tool paths for surface quality of impellers by smoothing point cutting tool paths in terms of linear segments and B-Splines and by using flank milling technologies with linear segment and B-Splines tool paths. Experimental results show that the surface quality of impeller blades can be improved by point cutting with smoothed tool paths and by flank milling. Moreover, the required milling time can be reduced by 18 percent and 13percent based on smoothed linear tool paths and smoothed B-Splines tool paths, respectively.

目錄 I
圖目錄 II
表目錄 IV
摘要 V
Abstract VI

第一章 緒 論 1
1.1 研究動機與目的 1
1.2 文獻回顧 2
1.3 研究方法 4
1.4 論文大綱 5

第二章 葉輪幾何模型建立 6
2.1 B-Spline曲線與曲面插值計算 6
2.2 葉輪幾何模型建構 8

第三章 粗加工路徑建構 18
3.1 五軸粗加工路徑 19
3.2 五軸加工機之逆運動轉換 21
3.3 線性路徑加工進給速度計算 23

第四章 精銑加工路徑建構 26
4.1 葉片側銑路徑建構 26
4.2 葉片點加工路徑建構 30
4.3 輪轂曲面加工路徑建構 41
4.4 五軸B-Spline刀具路徑之建構 43

第五章 實際加工例 48
5.1 粗加工與半精銑加工 48
5.2 精銑加工 50
5.3 葉片表面粗糙度比較 54
5.4 實驗討論 56

第六章 結論與討論 57

參考文獻 59

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