點云反求造型設計—汽車覆蓋件

機械論文編號:JX770  論文字數:18134.頁數:44

目  錄
摘要 i
Abstract ii
第一章    緒論 1
 1.1  逆向工程定義 1
 1.2  逆向工程研究內容 1
 1.3  逆向工程應用領域和發展趨勢 2
   CAD建模理論 5
 2.1  曲線曲面理論 5
 2.2  主要逆向工程軟件 6
   逆向工程關鍵技術 9
 3.1  測量 9
 3.2  點云數據處理 11
 3.3  三維模型重構技術 13
 3.4  曲面評價方法 14
   基于特征的某汽車覆蓋件CAD建模實例 17
 4.1  引言 17
 4.2  汽車覆蓋件逆向工程開發流程 17
 4.3  imageware點云數據處理 17
 4.4  UG后期處理 35
 4.5  誤差分析 36
第五章    總結 39
參考文獻 40
致謝 41

摘要
  逆向工程不僅僅是仿形設計和制造技術，而是在原型產品的基礎上進行二次設計和加工，是更高層次的設計技術。這一技術使產品模型得到精確的表達和再現，為產品的進一步分析、優化和制造確立了統一的對象，在產品快速設計開發和復雜型面數控加工方面都具有重大的意義。
 逆向工程應用于車身產品尤其是汽車覆蓋件產品的開發過程中，可以大大縮短開發周期，保證產品質量。本文通過提出一種逆向工程應用于汽車覆蓋件產品開發過程中的解決方案，對一些關鍵技術做出簡要的論述，并闡述了如何進行汽車覆蓋件的反求處理和誤差分析。在具體的實施過程中，首先在逆向軟件imageware中對原始數據處理，然后在UG軟件中用處理過的汽車覆蓋件數據進行打孔等后期處理，最后得出汽車覆蓋件的三維曲面模型，并進行了誤差分析。
 
關鍵詞：逆向工程  汽車覆蓋件 曲面重構  點云數據處理
 
  
 
Reverse Design of Automobile Panel Based on Point Cloud

                            Abstract
 The reverse-engineering is not only the profiling design and the technique of manufacture, but carries on two designs and the processing in the prototype product's foundation, is the top level design technique. This technology enables the product model to obtain the precise expression and the reappearance, for the product further analysis, the optimization and the manufacture has established the unified object, has the significant significance in the product fast design development and the complex profile numerical control processing aspect.
  The reverse-engineering applies in the automobile panal product particularly automobile panal product performance history, may reduce the development cycle greatly, the quality assurance. This article through proposed that one kind of reverse-engineering applies in the automobile panal product development process the solution, makes the brief elaboration to some key technologies, and elaborated how to carry on automobile panal self examination processing and the error analysis. In the concrete implementation process, first in reversion software imageware to primary data processing, then with has processed the automobile panal data carries on later periods and so on punch in the UG software to process, finally obtains the automobile panal three dimensional surface model, and has carried on the error analysis.
Keywords:Reverse Engineering  Automobile Panel  Curved face Reconstruction
Point cloud processing