點(diǎn)云反求造型設(shè)計(jì)—汽車(chē)零部件

機(jī)械論文編號(hào):JX723  論文字?jǐn)?shù):16567.頁(yè)數(shù):42   附CAD圖

目  錄
摘要 i
Abstract ii
目錄 Ⅲ
第一章    緒論 1
1.1  逆向工程定義 1
1.2  逆向工程研究?jī)?nèi)容 1
1.3  逆向工程應(yīng)用領(lǐng)域和發(fā)展趨勢(shì) 3
1.4  逆向工程的工作流程及步驟 4
   Imageware簡(jiǎn)介及反球建模理論 6
2.1  Imageware簡(jiǎn)介 6
2.2  點(diǎn)云數(shù)據(jù)處理 8
2.3  數(shù)據(jù)的處理技術(shù) 9
2.4  三維模型重構(gòu)技術(shù) 10
2.5  曲面的評(píng)價(jià)方法 11
   擋泥板反球造型 13
3.1 在Imageware中的數(shù)據(jù)處理 13
3.2  在UG中生成面 17
3.3  誤差分析 24
   零部件反球造型 27
4.1 在Imageware中的數(shù)據(jù)處理 27
4.2  在UG中生成面 28
4.3  誤差分析 34
第五章    總結(jié) 37
參考文獻(xiàn) 38
致謝 39

摘     要
 逆向工程就是根據(jù)已經(jīng)存在的產(chǎn)品模型，反向推出產(chǎn)品的設(shè)計(jì)數(shù)據(jù)（包括設(shè)計(jì)圖紙或數(shù)字模型）的過(guò)程。
 逆向工程已成為聯(lián)系新產(chǎn)品開(kāi)發(fā)過(guò)程中各種先進(jìn)技術(shù)的紐帶，并成為消化、吸收先進(jìn)技術(shù)，實(shí)現(xiàn)新產(chǎn)品快速開(kāi)發(fā)的重要技術(shù)手段。大多數(shù)關(guān)于逆向工程的研究主要集中在實(shí)物的逆向重構(gòu)上，即產(chǎn)品實(shí)物的CAD模型重構(gòu)和最終產(chǎn)品的制造方面。逆向工程應(yīng)用于車(chē)身產(chǎn)品尤其是汽車(chē)零部件產(chǎn)品的開(kāi)發(fā)過(guò)程中，可以大大縮短開(kāi)發(fā)周期，保證產(chǎn)品質(zhì)量。逆向過(guò)程主要有三個(gè)步過(guò)程，一，點(diǎn)過(guò)程；二，曲線(xiàn)的創(chuàng)建過(guò)程；三，曲面的創(chuàng)建過(guò)程。而本章主要運(yùn)用Imageware和UG兩個(gè)軟件完成逆向造型。首先在Imageware中根據(jù)點(diǎn)云的分布繪出所需要的外輪廓線(xiàn)及特征線(xiàn)，其次在UG中把這些外輪廓線(xiàn)及特征線(xiàn)連接起來(lái)，并使其封閉，再生成所需要的面，最后再進(jìn)行誤差分析。
 
關(guān)鍵詞：逆向工程  曲面重構(gòu)  點(diǎn)云數(shù)據(jù)處理
 
 Reverse Design of Automobile Panel Based on Point Cloud

 Abstract
 Reverse engineering is the product under the existing model, the reverse launch the product design data (including design drawings or digital model) process.
 Reverse engineering has become a link in new product development process of advanced technology ties, and a digest, absorb advanced technology, development of new products to achieve an important technical means. Most of the research on reverse engineering focused on physical reconstruction on the reverse, that kind of product CAD model reconstruction and the final product manufacturing.Reverse engineering for automotive body products, especially product development process, can greatly shorten the development cycle to ensure product quality. There are three major steps reverse the process of the process, one point process; 2, curve creation process; 3, surface creation process. The main application of this chapter, and UG Imageware two complete reverse modeling software.First Imageware point cloud distribution in the draw according to the needs and characteristics of the outer contour line, followed by those in the UG in the outline and characteristics of wire connected, and make it close, and then generate the required surface, and finally to error analysis.
 
 Keywords: Reverse Engineering  Curved face Reconstruction  Point cloud processing