The successful application of computer simulation techniques in sheet metal forming rises a urgent requirement for fully automatic mesh generation algorithm Cae仿真技术在汽车覆盖件冲压成型工艺中越来越多的应用，对快速的、自动化的有限元网格生成算法提出了强烈的要求。
And the definitions and traits of automobile panels and 3d reconstruction , research reasons of 3d reconstruction and the purpose and learned significance of this thesis are set forth 同时，阐述了汽车覆盖件与三维重构的内涵和特点、研究三维重构的必要性以及本文研究的目的和意义。
Abstract : this paper introduces the design of hem dies for automobile ' s covering parts , and gives a brief explanation about the several problems in the design and the working process of the die 文摘:介绍了大型覆盖件包合模具的设计，针对设计过程中出现的各种问题及模具的工作过程作了简要阐述。
Therefore , as the key part of auto - body , the panels are researched about the related theory and methods of reconstruction and processes analysis , which is nuclear in this thesis 为此，本文围绕汽车开发的关键部分? ?汽车覆盖件进行展开，研究了汽车覆盖件的三维重构与工艺分析的相关理论和方法。
Firstly , on the basis of analyzing research status and shortage about 3d reconstruction and process analysis of automobile panels , the main research contents of this thesis are proposed 首先通过分析汽车覆盖件的三维重构与工艺分析的研究现状和存在的不足，提出了本文所要研究和解决的主要问题。
For a car , the stiffness of its armor plate can affect its quality and safety . therefore , it is necessary and important to study how to measure the stiffness of large parts 对于汽车覆盖件这种大型部件,其刚度值的大小,直接会影响汽车的质量、安全等,因此,有必要对大型部件的刚度测量进行研究和探索。
This paper introduces some key technologies used in reverse engineering of tractor covering panel , such as cmm fitting of surface , reconstructing of surface , smoothing of surface etc 摘要介绍了施拉机覆盖件逆向工程中的若干关键技术，诸如，三座标测量技术、曲面拟合技术、曲面重构技术、曲面光顺、曲面片的拼接等技术。
Started from the importance and changeability of the direction of drawing the auto body metal sheets , and based on the principle of determining the drawing direction , an optimized model for the drawing direction was set up 从汽车覆盖件拉伸方向的重要性和可改变性出发，根据确定拉伸方向的原则，建立了拉伸方向的优化模型。
Through the investigation of coating processes of covering parts of construction equipment , it is suggested that stream line operation should be adopted for covering parts coating and then to assemble the coated parts products 通过对工程机械设备的覆盖涂装工艺的探讨，建议涂装覆盖件采用流水线作业，对涂装成品件实施装配。
