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研究生:鄭有泰
研究生(外文):Yu-Tai Cheng
論文名稱:以特徵辨識應用於快速NC重建及模擬之研究
論文名稱(外文):Study of Rapid NC Reconstruction and Simulation Using Feature Recognition
指導教授:佘振華佘振華引用關係
指導教授(外文):Chen-Hua She
學位類別:碩士
校院名稱:國立虎尾科技大學
系所名稱:創意工程與精密科技研究所
學門:藝術學門
學類:視覺藝術學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:84
中文關鍵詞:特徵辨識特徵樹NC重建
外文關鍵詞:Feature RecognitionFeature TreeNC Reconstruction.
相關次數:
  • 被引用被引用:5
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  • 下載下載:3
  • 收藏至我的研究室書目清單書目收藏:0
現今的工具機發展日新月異,雖然科技不斷在進步,在傳統加工中,車床與三軸銑床工具機仍是有著相當多的市場佔有率,本論文研究目的為辨識NC程式之加工特徵,並發展快速修改NC輪廓切削之系統。
一般情況下,吾人由CAD產生的圖檔透過CAM規劃刀具路徑,經後處理產生加工所需的NC程式,但如果只需要小幅修改輪廓,還是得取回原始圖檔再以重複步驟產生新NC程式,如果沒有辦法取得原始圖檔,則只能使用人工撰寫,不僅浪費時間,程式出錯率更是一大問題;藉由本論文所開發的特徵辨識系統可快速辨識出NC切削程式原始二維輪廓,在銑床方面,以特徵樹(Feature Tree)的方式,呈現所有特徵的數目與該特徵中所包含的層數,亦可由特徵樹中的排序得知特徵與特徵之間的父子關係,本文所發展的系統結合CAD的功能,可提供使用者快速修改輪廓並將輪廓傳回特徵樹;在車床方面,本論文針對精加工部份做辨識,以工作表單的方式呈現所有特徵輪廓與加工順序,並提供使用者修改這些特徵輪廓,最後再輸出新NC程式,以達到快速重建NC程式的功能。
本論文也發展智慧型人機介面實作於PC-Based控制器,結合了上述功能並提供模擬與干涉碰撞功能,使得快速修改輪廓後所產生新的NC程式可以快速模擬與驗證。
Machine tool has been advancing, yet lathe and 3-axis milling machine tools in conventional machining still have considerable market share. This study aimed to identify CNC program machining feature, and develop system of modifying CNC profile rapidly.
Normally, CAM plans tool path via CAD file, and the CNC program needed for machining is generated by postprocessor. However, for minor change of profile, engineers have to retrieve the original CAD file and repeat the steps to generate new CNC program. Without the original CAD file, it has to be written manually, which is not only time-consuming, but also leads to numerous program errors. The feature recognition system developed in this study can quickly recognize the original 2D profile of CNC program. In case of milling function the number of all features and layers contained in each feature can be displayed in Feature Tree, and parent-child relationship among features can be known from rank of feature tree. The proposed system combines CAD function, allowing users to modify profile rapidly and send back to feature tree. In terms of lathe, the system recognizes finish machining, displays all feature profile and machining sequence in worksheet, allows users to modify these feature profiles, and finally, exports the new CNC program, so as to achieve function of rapid reconstruction of CNC program.
This study also developed intelligent human-machine interface applied in PC-Based controller, which integrates the above functions and provides simulation and collision check functions, so that new CNC program derived from fast modification of profile can be used in rapid simulation and validation.
中文摘要..................................................i
英文摘要.................................................ii
誌謝....................................................iii
表目錄...................................................vi
圖目錄..................................................vii
符號說明.................................................xi
第一章 緒論..............................................1
1.1 研究動機與目的.......................................1
1.2 研究方法與步驟.......................................2
1.3 文獻回顧.............................................3
1.3.1 智能化工具機.......................................3
1.3.2 特徵辨識...........................................4
1.3.3 輪廓偏置...........................................7
1.4 研究限制.............................................9
1.5 論文架構............................................10
第二章 控制器人機介面設計與規劃.........................11
2.1 人機介面設計流程....................................11
2.2 人機介面設計規劃....................................12
2.3 系統分析............................................14
第三章 車床及銑床特徵辨識...............................19
3.1 銑床特徵辨識方法與流程..............................19
3.1.1 特徵樹的建立......................................23
3.1.2 特徵樹的重建......................................28
3.2 車床特徵辨識方法與流程..............................29
3.2.1 工作表單的建立....................................31
第四章 輪廓刀具路徑規劃與模擬...........................32
4.1 輪廓線的修改........................................32
4.2 輪廓線段偏置........................................34
4.2.1 線段偏置運算方法..................................34
4.2.2 線段交點座標之計算................................37
4.2.3 偏置線段交點型式判斷..............................42
4.2.4 修補輪廓及過切排除................................46
4.3 刀具路徑插補方法....................................51
4.3.1 直線插補 (G01)....................................51
4.3.2 圓弧插補 (G02/G03)................................53
4.4 機台干涉判斷........................................55
4.4.1 干涉判斷方法......................................56
第五章 人機介面整合CAD/CAM之系統與加工實例..............61
5.1 研究使用之軟硬體設備................................61
5.2 人機介面實作測試....................................62
第六章 結論與未來展望...................................79
6.1 結論................................................79
6.2 未來展望.............................................80
參考文獻.................................................82
作者簡歷.................................................84
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