本科毕业设计(论文)

I目录摘要............................................................................................................1第一章绪论.......................................................................................51.1逆向工程简介.........................................................................................51.1.1逆向工程的概念..................................................................................51.1.2逆向工程的现状及应用......................................................................61.1.3逆向工程的一般步骤........................................................................91.2测量工具ATOSⅠ介绍.........................................................................101.3软件Pro/E介绍..................................................................................131.4CATIA软件介绍....................................................................................161.5本课题的意义和内容..........................................................................19第二章逆向工程中的测量技术.....................................................192.1测量方式...............................................................................................202.2零件扫描过程......................................................................................222.3本章小结...............................................................................................25第三章逆向工程的后处理及三维建模.......................................263.1逆向工程的后处理..............................................................................263.1.1逆向工程后处理的要求..................................................................263.1.2曲线与曲面的连续性......................................................................273.1.3曲线的拟合......................................................................................273.1.4曲线的构建......................................................................................283.1.5点数据处理......................................................................................293.1.6曲线的构建和分析..........................................................................313.1.7曲面构建与分析..............................................................................333.2基于CATIA软件下逆向后处理..........................................................363.2.1CATIA曲面重构工具介绍..............................................................363.2.2平面特征..........................................................................................383.3曲面重构具体过程[4][5][6].....................................................................38II3.5曲率分析...............................................................................................473.4本章小结...............................................................................................49第四章基于Pro/E的玩具汽车结构设计及虚拟装配...............504.1各个零部件的设计.............................................................................504.1.1规则实体重构方法..........................................................................504.1.2零件设计的一般步骤......................................................................504.2虚拟装配...............................................................................................564.3本章小结...............................................................................................61第五章结论....................................................................................61参考文献......................................................................................................63致谢........................................................................................................651摘要逆向工程技术是数字化与快速响应制造大趋势下的一项重要技术，是CAD领域中一个相对独立的范畴。逆向工程是一项开拓性、综合性、实用性较强的技术，逐渐成为产品开发中不可或缺的一环。逆向工程能够提高设计精度，获得较高的模型质量，缩短设计和制造周期，具有广阔的应用前景，因此受到各国工业界和学术界的高度重视。本文研究了逆向工程的关键技术，并应用于玩具车覆盖件的模型重建。逆向工程的关键技术包括:数据获取、数据处理和模型重建。通过对数据处理方法进行研究，得到数据处理的一般流程。根据根据玩具车覆盖件的特点，采用逆向工程方法完成模型重建工作。采用ATOSI光学扫描仪高效率、高精度地完成玩具车覆盖件的数据获取工作。应用CATIA软件完成玩具车覆盖件的数据处理工作，获得完整、准确的数据以方便后续模型重建工作的进行。以CATA软件和Pro/E软件相结合的方法，充分利用软件的优势，完成玩具车模型的重构工作。研究表明，采用逆向工程的方法完成玩具车覆盖件的模型，可以获得较高的模型质量，提高效率，是一种行之有效的方法，具有重要的实际意义和较高的应用价值。关键词:逆向工程CATIAPro/E2AbstractReverseengineering,asarelativelyindependentcategoryinCAD,isanim-portanttechniqueinthetendencyofdigitalandrapidresponsemanufacture.Beingpioneering,integratedandcomparativelypractical,reverseengineeringhasbecomean3indispensabletechniqueinproductexploitation.Reverseengineeringcanenhancetheprecisionofdesign,producehighqualitymodelandshortenthecycleofdesignandmanufacture.Asaresult,itholdsoutbroadprospectsforapplicationandisthoughthighlyofinbothindustrialandacademiccirclesinmanycountries.Thekeytechniquesofreverseengineeringareresearchedandappliedtoshroudmodelreconst-ructionoftoycarinthisthesis.Thekeytechniquesofreverseengineeringinclude:dataacquisition，dataprocessingandmodelreconstruction.Byresearchingonthetechniquesofdataprocessing,thegeneralmanipulationflowofdataprocessingisexplored.Inlightofthecharacteristicsofshroudpartsofmotorcycles,theshroudmodelreconstructionoftoycariscompletedwithreverseengineering.ThedataiscollectedwithATOSIopticalscannerefficientlyandaccurately.Thedataprocessingofshroudparts