点云反求造型设计—汽车覆盖件

机械论文编号:JX770  论文字数:18134.页数:44

目  录
摘要 i
Abstract ii
第一章    绪论 1
 1.1  逆向工程定义 1
 1.2  逆向工程研究内容 1
 1.3  逆向工程应用领域和发展趋势 2
   CAD建模理论 5
 2.1  曲线曲面理论 5
 2.2  主要逆向工程软件 6
   逆向工程关键技术 9
 3.1  测量 9
 3.2  点云数据处理 11
 3.3  三维模型重构技术 13
 3.4  曲面评价方法 14
   基于特征的某汽车覆盖件CAD建模实例 17
 4.1  引言 17
 4.2  汽车覆盖件逆向工程开发流程 17
 4.3  imageware点云数据处理 17
 4.4  UG后期处理 35
 4.5  误差分析 36
第五章    总结 39
参考文献 40
致谢 41

摘要
  逆向工程不仅仅是仿形设计和制造技术，而是在原型产品的基础上进行二次设计和加工，是更高层次的设计技术。这一技术使产品模型得到精确的表达和再现，为产品的进一步分析、优化和制造确立了统一的对象，在产品快速设计开发和复杂型面数控加工方面都具有重大的意义。
 逆向工程应用于车身产品尤其是汽车覆盖件产品的开发过程中，可以大大缩短开发周期，保证产品质量。本文通过提出一种逆向工程应用于汽车覆盖件产品开发过程中的解决方案，对一些关键技术做出简要的论述，并阐述了如何进行汽车覆盖件的反求处理和误差分析。在具体的实施过程中，首先在逆向软件imageware中对原始数据处理，然后在UG软件中用处理过的汽车覆盖件数据进行打孔等后期处理，最后得出汽车覆盖件的三维曲面模型，并进行了误差分析。
 
关键词：逆向工程  汽车覆盖件 曲面重构  点云数据处理
 
  
 
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