汽车前罩盖和拉延模具设计.doc

.WORD完美.格式编辑. .技术资料.专业整理. 汽车发动机罩外板曲面逆向重构及拉延模设计 .WORD完美.格式编辑. .技术资料.专业整理. 摘 要 汽车覆盖件模具设计和逆向工程是现代汽车行业中比较热门的研究领域。本文以南京菲亚特派朗汽车发动机罩外板作为研究对象，进行了汽车发动机罩外板逆向曲面重构及汽车发动机罩外板拉延模具设计。 本文对汽车发动机罩外板利用三维激光扫描仪进行三维坐标测量得到点云数据，对所得点云数据使用逆向工程软件CATIA进行预处理。包括点云的过滤、修剪、补洞、形成三角网格等；用CATIA软件对其进行逆向曲面重构，得到重构出的发动机罩外板曲面；以重构出的曲面为基础，设计出汽车发动机罩外板的拉延模具结构外形，在CATIA软件中做出凸模、凹模和压料圈等结构；并对拉延模具进行有关的工艺计算和参数确定。最终，做出汽车发动机罩外板的加工动画。 关键词：汽车覆盖件；逆向工程；曲面重构；拉延模具 ABSTRACT Automotive panel die design and the reverse engineering are the modern automobile industry in the hot research field. In this paper, we as the car engine hood outer panel of Nanjing Fiat Perla to study, carried out the car engine hood outer panel surface reverse remodeling and car hood cover mold design. In this thesis, we use the Three-dimensional to scan the car engine hood outer panel, and we achieve the point cloud. Then we choose CATIA, which is a high-class software of Inverse Engineering, to process the data. Next, it’s the processing of the point cloud and surface reconstruction. As the surface finished, the drawing dies need to be modeled; To meet the challenge, we construct them by the software of CATIA. There are three parts in the drawing dies, which are punch, die and blank-holder, and drawing die for the calculation. Finally, make a car hood outer panel machining simulation. Keywords: Automobile Panels, Inverse Engineering, Surface Reconstruction, Drawing Dies TOC \o 1-3 \h \z \u 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc296343489 第一章 绪 论 PAGEREF _Toc296343489 \h 1 HYPERLINK \l _Toc296343490 1. 课题研究的内容及意义 PAGEREF _Toc296343490 \h 1 HYPERLINK \l _Toc296343491 2. 逆向工程及其发展状况 PAGEREF _Toc296343491 \h 1 HYPERLINK \l _Toc296343492 3. 汽车覆盖件的含义及特点 PAGEREF _Toc296343492 \h 2 HYPERLINK \l _Toc296343493 4. 汽车