反求工程中实物测量数据补缺及重构技术  

A Study on Gap Mending and Surface Reconstruction in Reverse Engineering

作　　者：瞿建武[1] 柯映林[2] 李江雄[2] 

机构地区：[1]温州大学机械学院,温州325000 [2]浙江大学机械工程及自动化系,杭州310027

出　　处：《机械科学与技术》2002年第3期491-493,共3页Mechanical Science and Technology for Aerospace Engineering

基　　金：教育部博士点专项基金项目 (980 3 3 5 2 )资助

摘　　要：复杂曲面反求工程建模是目前 CAD领域的热门研究课题之一 ,通用 CAD/ CAM软件还不能很好地解决这个问题。尤其是一些带凹边、孔或槽等特征的复杂自由曲面零件的 NURBS曲面重构 ,在实际 CAD建模过程中更是耗时、费力。本文针对这类反求工程 CAD建模问题。提出了对实物零件进行人工局部补缺和通过专门软件对数字模型进行补缺的复合数据预处理方法 ;基于三角曲面模型 ,研究了复杂曲面零件的分区 NURBS曲面重构。利用反求工程软件 RE- SOFT,解决了有关零件的反求工程 CAD建模 ,大大缩短了实物样件的反求设计和建模时间 。It is a hot topic in CAD field how to reconstruct complex surface in RE(reverse engineering). Commercial CAD/CAM software cannot solve the issue perfectly. Especially it is very difficult in practical work to reconstruct the NURBS surface from the sculptured objects with gap, such as hole, slot or concave etc. Therefore, a method was proposed to mend the gap of the practical part manually before measure or the digital data model by the software specially. Relying on mathematic model described with TBP base, the complex reconstruction NURBS surface is researched by splitting area. An example shows that the method is efficient and reliable in processing a complex surface product.

关 键 词：反求工程 曲面补缺 复杂曲面 CAD 建模 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]