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研究生: 柯俞仲
Ko, Yu Chung
論文名稱: 五軸智慧控制器
Intelligent Five-Axis CNC Controller
指導教授: 雷衛台
Lei, Wei Tai
口試委員: 吳隆庸
Wu, Long Iong
徐永源
Hsub, Yung Yuan
學位類別: 碩士
Master
系所名稱: 工學院 - 動力機械工程學系
Department of Power Mechanical Engineering
論文出版年: 2016
畢業學年度: 104
語文別: 中文
論文頁數: 78
中文關鍵詞: 五軸刀具指向角速度加減速規劃單節轉接
外文關鍵詞: Five-axis, Angular Feedrate, Acc/Dec, Block Transition
相關次數: 點閱:2下載:0
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  • 本論文提出一刀具指向角速度規劃方法,使角速度於G01單節間得以連續轉接,適用於可自由變換刀具指向的五軸同動CNC工具機。當G01單節需進行路徑插補及改變刀具指向時,傳統作法中,後者的插補會與前者呈線性相依,使空間中的角速度於G01單節間轉接時會出現不連續的情況,此現象反應至實際加工上,除影響加工精度外,也會降低進給機構的壽命。本文即針對上述問題研究解決方案,使空間中之角速度能於G01單節間連續轉接。
    文中先透過理論推導及考慮實際應用情況,排除傳統作法中角速度於G01單節間以零速進行連續轉接之方案,接著在多種設計準則權衡下,提出一能獨立於進給速度規劃的角速度梯形加減速規劃方法,其具計算簡單、可適用於多種G01單節條件等特色,且可使角速度於G01單節間連續轉接。另外此規劃方法可在不同G01單節條件下,針對當下情況,智慧性地規劃出不同的角速度曲線。
    本論文設計兩包含路徑插補及改變刀具指向之G01單節以進行路徑模擬,可觀察套用本文所提出的角速度規劃方法後,角速度於G01單節轉接處呈連續且角加速度受到適當拘束,對比傳統作法所造成的角加速度上衝,此角速度規劃方法可使機器在G01單節轉接時能平滑地運動。


    In five-axis CNC machine tools, the tool orientation is freely programmable. Taking the angular interpolation into account, the conventional method couples the angular feedrate with the linear one for the linear path interpolation. However, this would lead to discontinuities in angular federate, especially at the block transition point. Aiming at making smoother motion during five-axis machining, this thesis presents a method for the angular feedrate scheduling which is independent of linear feedrate acceleration/deceleration and able to ensure a continuous angular feedrate at the block transition point. Additionally, the method features the intelligence for handling some blocks of special conditions. Simulation results proved that the developed scheduling method could make angular feedrate continuous and reduce the angular acceleration at the block transition point.

    摘要 i 目錄 iii 圖目錄 v 表目錄 ix 符號表 x 1. 前言 1 2. 研究背景 2 2.1 五軸工具機 2 2.2 G01線性插補定義 4 2.3 線速度之梯形加減速規劃規則 5 2.4 文獻回顧 6 2.5 研究動機與目的 7 3. 線性相依下單節間角速度之連續轉接 8 3.1 轉接時線速度與角速度之調整 8 3.2 轉接時線速度及角速度之計算 11 3.3 可行性評估 13 4. 單節中部份維持線性相依下 單節間角速度之連續轉接 14 4.1 線性相依成立區域之選擇 14 4.2 轉接時發生加減速之單節 15 4.2.1 差異部分處理 16 4.3 可行性評估 18 5. 角速度之加減速規劃 20 5.1 梯形加減速規劃應用於角速度規劃 20 5.1.1 角速度規劃設計準則-路徑與角度插補同時開始及結束 20 5.1.2 角速度規劃設計準則-節省進給時間 22 5.1.3 角速度規劃設計準則-保持穩速區段 24 5.1.4 加減速規劃規則之調整 25 5.2 參考角速度 26 5.3 目標角速度及加減速規劃 27 5.3.1 規劃通則 27 5.3.2 特例之規劃 34 5.3.2.1 結尾單節 35 5.3.2.2 獨立單節 49 5.4 單節時間延長後之線速度規劃 52 5.4.1 規劃通則 53 5.4.2 特例之規劃 59 5.5 可行性及未來發展評估 59 6. 路徑模擬 66 6.1 XA轉接XA 67 6.2 XAC轉接XAC 69 6.3 XA轉接XC 73 7. 結論與未來發展 76 參考文獻 77

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