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研究生:陳建文
研究生(外文):Chien-Wen Chen
論文名稱:葉輪加工效率改善之研究
論文名稱(外文):A Study on the Improvement of Machining Efficiency of Impellers
指導教授:蔡得民
指導教授(外文):Dermin Tsay
學位類別:碩士
校院名稱:國立中山大學
系所名稱:機械與機電工程學系研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:101
中文關鍵詞:五軸加工扇型高點干涉
外文關鍵詞:InterferenceFive-axis MachiningScallop Height
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葉輪 (Impeller) 為精密機械、航太工業與能源技術中之一關鍵性零組件。由於其形狀複雜且具有高度之干涉程度,因此,在加工上困難,必須使用多軸加工機以順利加工葉輪,要精密且快速有效率的加工葉輪實為一大挑戰。
本論文之研究目的係研究如何提高葉輪之加工效率,包含等深、等寬之粗切加工路徑,刀具干涉之判斷及避免,弦高誤差及扇型高點之控制,最後並利用最小平方法提出建構 NURBS (Non-uniform Rational B-splines) 刀具路徑之方法,以提高葉輪加工之精度及效率。


Impellers are important components in the field of precision machine, energy technology, and aerospace industries. Due to their complex geometries and a higher degree of interference, multi-axis machines are requested to product impellers with desired accuracy.
The object of this thesis is to improve the five-axis machining efficiency and accuracy. The involved techniques include: the construction of equal depth and equal width tool paths in rough machining, the methods for interference check and avoidance, error evaluation and control of chordal deviation and scallop height, as well as three and five dimension NURBS (Non-uniform Rational B-splines) tool paths generation by a least squares method.


摘要………………………………………………………………………I
目錄……………………………………………………………………..III
圖目錄…………………………………………………………………...V
第一章 緒論………………………………………………………..…..1
1-1 前言……………………………………………………...1
1-2 文獻回顧………………………………………...………2
1-3 論文大綱………………………………………...………3
第二章 電腦輔助幾何模型建立…………………………………..…..5
2-1 空間幾何…………………………………………...……7
2-2 有理式B仿線曲線與曲面之插值…………………….11
2-2.1 B仿線曲線……………………………...…………11
2-2.2 B仿線曲面………………………………………..14
2-3 葉輪幾何模型建立………………………...…………..15
2-3.1 弧形曲面與葉面之建立……………………….….16
2-3.2 輪轂曲面建立………………………………….….19
2-3.3 曲面交接與圓角曲面………………………..……20
第三章 刀具路徑規劃………………………………………….…….22
3-1 等深與等寬之粗切刀具路徑………………………….22
3-1.1 等深之加工面………………………………..……24
3-1.2 等寬加工路徑……………………………..………30
3-1.3 路徑之規劃…………………………………..……33
3-2 刀具之干涉判斷……………………………………….34
3-3 弦高誤差及扇型高點誤差控制………………...……..41
第四章 NURBS 刀具路徑之建構…………………………………...49
4-1 三軸 NURBS 刀具路徑之建構…………………..….50
4-2 動態特性實驗………………………………………….58
4-3 五軸加工機之逆運動轉換…………...………………..67
4-4 五軸 NURBS 刀具路徑之建構……………..……….72
第五章 應用實例……………………………………………..………81
5-1 加工機介紹……………………………….……..……..81
5-2 電腦軟體說明…………………………….……..……..82
5-3 加工實例………………………………….…..………..86
第六章 結論…………………………………………………………..88
參考文獻………………………………………………………………..90
附錄A………………………………………………………...…………98


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