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  • 學位論文

用於五軸同動加工之即時曲面曲線插補器

Real-Time Surface Curve Interpolator for Five-Axis Machining

指導教授 : 雷衛台
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摘要


本論文針對五軸曲面加工,為改善傳統資訊處理流程所產生NC碼之問題,導入了STEP-NC參數化輸入之概念,以完整定義之加工參數以及曲面、曲面曲線描述做為五軸曲面加工輸入檔,並在CNC系統內部規劃、實現了相對應的展開模組,使CNC系統具有智慧型規劃五軸曲面加工之能力。 此外,為提高即時插補之計算效率,本論文提出了快速即時NURBS曲面曲線插補方法,先於線上非即時環境下計算曲面曲線長度,以及建立描述路徑長度與曲線參數關係之路徑長反函式,然後便可以在線上即時環境利用路徑長反函式進行高效率之曲面曲線插補計算。另外插補器還提供了即時刀具指向計算以及三維刀具半徑補正之功能,增加了五軸曲面加工刀具使用之彈性,並且針對不同工件外型以及加工條件,賦予使用者選擇自由刀具指向或是限定刀具指向等不同刀具指向方法之自由,從而使五軸曲面加工可以達到最佳之加工品質。 最後,以VC++ 6實現快速即時曲面曲線插補器相關模組於五軸CNC控制系統之中,透過模擬之方式驗證了此曲面曲線插補器有良好之計算效率以及極高之進給精度,並藉由此五軸CNC系統控制五軸機器進行曲面加工之實驗,可以成功加工出自行設計之自由曲面以及凸面、凹面等不同類型之曲面,而證實了本論文提出之研究方法以及相關軟體實現之正確性。

關鍵字

即時插補 五軸加工 NURBS CNC 曲面曲線

並列摘要


HASH(0x1aad2f20)

參考文獻


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[12] ISO 10303-1, Industrial Automation Systems and Integration-Product Data Representation and Exchange-Part 1: Overview and Fundamental Principles, 1994. [13] ISO 10303-11, Industrial Automation Systems and Integration-Product Data Representation and Exchange-Part 11: Description Methods: The EXPRESS Language Reference Manual, 1994 [14] ISO 10303-21, Industrial Automation Systems and Integration-Product Data Representation and Exchange-Part 21: Implementation Methods: Clear Text Encoding of the Exchange Structure, 1994 [15] ISO 10303-42, Industrial Automation Systems and Integration-Product Data Representation and Exchange-Part 42: Integrated Generic Resources: Geometric and Topological Representation, 1994 [16] 林亮佑,CNC控制器之即時NURBS插補,碩士論文,國立清華大學動力機 械研究所,2004 [17] L. Piegl, W. Tiller, The NURBS Book, 2nd ed. Berlin: Springer, 1997 [18] 吳稚逸,基於STEP-NC之五軸曲面加工,碩士論文,國立清華大學動力機 械研究所,2004 [19] W.T. Lei,Flaechenorientierte Steuerdatenaufbereitung fuer das fuenfachsige Fraesen, Springer-Verlag, Dissertation, 1992 [20] A. Pressley, Elementary Differential Geometry, London:Springer, 2001 [21] J.D. Faires, R. Burden, Numerical Methods, 2nd ed. Pacific Grove, CA: Brooks/Cole Pub. Co., 1998 [22] 宋孟沛,快速NURBS路徑插補及幾何誤差補償方法,博士論文,國立清華 大學動力機械研究所,2007 45

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邱婉婷(2014)。五軸刀具中心點插補及刀具軸向控制之研究〔碩士論文,國立虎尾科技大學〕。華藝線上圖書館。https://doi.org/10.6827/NFU.2014.00161
王冠中(2010)。開發一具有即時預視功能之混合型NC碼插補器〔碩士論文,國立虎尾科技大學〕。華藝線上圖書館。https://doi.org/10.6827/NFU.2010.00073
劉威廷(2010)。五軸曲面噴印系統〔碩士論文,國立清華大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0016-1901201111411736
黃柏翰(2010)。直紋曲面五軸銑削及放電複合加工系統〔碩士論文,國立清華大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0016-1901201111411205

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