臺灣博碩士論文加值系統

本文利用四軸及五軸兩種不同的銑削方式，針對由直紋曲面設計而成的螺旋式真空幫浦轉子進行銑削加工研究。
首先根據螺旋式真空幫浦轉子的幾何設計資料推導其曲面方程式，並以四軸銑削和五軸銑削兩種不同的加工方法進行刀具軸向與位置的設定，透過工具機與轉子間的座標轉換，得到四軸及五軸銑削轉子的刀具位置資料。其次，本文以齊次座標轉換原理，推導出工具機結構矩陣，經與轉子加工之刀具位置資料整合後，得到四軸和五軸銑削加工所需之NC碼參數方程式。最後，依照上述產生NC碼之方法配合製程規劃及NC程式架構所寫成的後處理程式，產生銑削螺旋式真空幫浦轉子之數值控制程式，經由實體模型切削軟體(VERICUT)模擬與鋁合金切削實驗，驗證了本論文所提之推導分析方法運用於螺旋式真空幫浦轉子四軸及五軸銑削加工之正確性。

In this thesis, the four-axis and five-axis milling methods are developed for machining the screw type vacuum pump rotor which is designed using the ruled surface method. First, the surface equation represented in Plucker coordinate system is derived from the geometric parameter data of the rotor. The cutter location data are then generated for both four-axis and five-axis milling methods through homogeneous coordinate transformation between the machine and rotor coordinates . By integrating the structure transformation matrix of the machine tool with the cutter location data, the equation of the NC data needed for the four-axis and five-axis milling is established. Finally, based on the NC data equation and cutter location data, the post-processor routine is constructed to generate the NC data. Through milling simulation using VERICUT software and experiment with AL 6061-T6 material, the four-axis and five-axis milling methods presented in this thesis are validated for the machining of the screw type vacuum pump rotor.

中文摘要Ⅰ
英文摘要Ⅱ
誌謝Ⅲ
總目錄Ⅳ
圖目錄Ⅶ
表目錄Ⅸ
符號說明Ⅹ
第一章 前言
1-1概述1
1-2文獻回顧3
1-3研究目的與範疇8
第二章 座標系統與座標轉換矩陣
2-1座標系統10
2-2座標轉換矩陣12
第三章 轉子曲面方程式
3-1直紋曲面18
3-2蒲律克座標20
3-3由蒲律克座標定義直紋曲面22
3-4轉子曲面及其法向量方程式之推導24
第四章 轉子加工之刀具位置推導
4-1多軸加工之幾何定義29
4-2刀具位置之推導30
4-2-1四軸銑削圓錐體之刀具位置30
4-2-2五軸銑削圓錐體之刀具位置32
4-2-3四軸銑削螺旋肋面之刀具位置34
4-3四軸及五軸NC碼參數方程式36
第五章 轉子加工之製程規劃與NC程式設計
5-1製程規劃42
5-1-1轉子外形初胚車削加工43
5-1-2轉子外形銑削加工45
5-1-3轉子內孔車削加工50
5-2 NC程式設計51
5-2-1 NC程式之架構與格式51
5-2-2後處理程式54
第六章 結果與討論
6-1刀具位置推導之結果與討論58
6-1-1四軸及五軸銑削圓錐體之刀具位置58
6-1-2四軸銑削肋面之刀具位置59
6-2 銑削轉子之NC程式63
6-3實體切削模擬軟體之驗證65
6-4實際加工之結果75
第七章 結論與建議
7-1結論79
7-2建議81
參考文獻82
附錄一86
附錄二87
自述88

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