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研究生:劉德進
研究生(外文):Liu,De.Chin.
論文名稱:以逆向工程構建任意形狀曲線與曲面之研究
論文名稱(外文):The Study of Use Reverse Engineering to Construct free-form
指導教授:王中行王中行引用關係
指導教授(外文):Ph.D. Wong,T.S.
學位類別:碩士
校院名稱:大葉大學
系所名稱:機械工程研究所
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:1995
畢業學年度:83
語文別:中文
論文頁數:106
中文關鍵詞:電腦輔助設計電腦輔助製造三次元量床逆向工程曲線曲面
外文關鍵詞:CADCAMCMMReverse EngineeringCurveSurface
相關次數:
  • 被引用被引用:5
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  • 下載下載:0
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本研究主要是在整合電腦輔助設計和電腦輔助製造與三次元量床構成逆向
工程系統,以構建任意形狀曲線和曲面.其涵蓋(1)如何在電腦輔助繪圖之
套裝軟體內建立任意形狀曲線和曲面,(2)如何利用三次元量床所量測的資
料檔案逆向在電腦輔助繪圖系統完成物件之近似曲面顯現,而且能以參數
值來修飾之,使其更接近實際模型的曲面形狀,(3)在CAD系統中實施切削加
工之路徑顯示,並在CAD系統自動產生數值控制程式,再以RS-232和CNC工具
機連線來完成自由曲面的加工.本論文以Ferguson,Bezier,B-Spline等三
種曲線曲面的產生原理及修正方法來做分析比較,利用不同的參數值來改
變曲線曲面的外形輪廓,最後選擇了以B-Spline為基底的摻合函數,達成擬
合效果之NURBS曲面理論來做為自由曲面逆向工程的建立依據,並以NURBS
理論導入做為加工輪廓,以產生加工路徑和NC程式.本研究以電腦輔助繪圖
軟體AutoCAD當曲線曲面圖形顯示界面,利用 AutoLISP語言完成曲線曲面,
逆向工程,加工路徑和NC程式的模組.以ZEISS CMM當自由曲面的量測工具,
以MasterCAM和SmartCAM所產生的NC程式和CAD系統所產生的NC程式來做比
較,以CNC綜合加工機來做自由曲面的實際加工印證.
This research is integrate CAD (Computer Aided Design),CAM (
Computer Aided Manufacturing), and CMM (Coordinate Measuring
Machines) to construct a reverse engineering system for
generating free-form curves and surfaces. The following objects
will be reached. First, to draw free-form curves and surfaces
by using special self designed function in CAD software.
Second, to convert the CMM measured data into a CAD system by
using the reverse engineering function, which provides the user
a good approached profile surface and the flexibility of fine
tunning the result by changing parameter. Third,to show the
cutting path simulation directly in CAD system and genrate the
NC progam automatically. After achieving the above aims, the NC
program can via RS-232 connecting with a CNC milling machine
transfer to accomplish the free-form surface machining. This
thesis is based on Ferguson,Bezier,B-Spline algorithm for the
analysis of curves,surfaces generation and modification.
Different parameters are used to change the profile of curves
and surfaces. The fitting effect of NURBS(Non-Uniform B-Spline
surface) algorithm can be accomplished by using blending
function of the B-Spline for the basis of the free-form surface''
s reverse engineering system. NURBS algorithm is used as
introduced the machining profile to generate cutting path and
NC programming. AutoCAD is used as the curve''s and surface''s
graphics display interface. By using AutoLISP language curves,
surfaces, reverse engineering, cutting path, and NC programming
model can be completed. The ZEISS CMM system is used as the
free-form surface''s measuring instrument. The output from the
MasterCAM and SmartCAM compares with NC program generation from
AutoCAD. After that,the correctness of real free-form surfaces
machining can be complete by using CNC milling machine.
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