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1、黑龙江工程学院本科生毕业设计附 录 附录A 外文文献原文The physical model of product surface measurement, according to the process of reverse engineering of measuring point cloud data complete product model 3 d CAD model in engineering practice, a wide range of applications. Reverse Engineering (Reveme Engineering) in the fie
2、ld of product design is a key technology, is based on existing product model, reverse launched the product design data (including design drawings or mathematical model) process. Specifically, reverse engineering, is the main work for existing parts, use 3 d digital measuring system accurate and fast
3、 for point cloud data, through curved surface reconstruction and editing, modify, get can be used to design and manufacture of the CAD model following the.Imageware is widely used home and abroad the reverse software, has the formidable measurement data processing, curve fitting of surface, error de
4、tection function. Can handle tens of thousands or even millions of point cloud data. According to the point cloud data can be tectonic level A curved surface with good quality and surface continuity. Imageware software in the treatment of the point cloud data and characteristic curve fitting aspects
5、 have advantages, but the offer surface modeling and auxiliary means and function complete commercial CADCAM software, there is still a gap comparedCATIA V5 is now widely used high-end CAD/CAM/CAE software system, the reverse function mainly consists of two modules to complete: digital editor module
6、 (DSE) and fast surface create module (QSR digital editor module DSE is mainly used to complete the point cloud of input, filter, generating grid curved surface and generate scan lines, fast surface create module of the function is include further QSR generated curve and surface filling, Gui bai pro
7、cessing, surface analysis. In actual work, two module interaction, can complete the point cloud use the rapid processing, curve and surface reconstruction, 3 D model establishment, etc.Combined with Imageware and the use of the software of CATIA, by optical measurement system of the shell on hand po
8、int cloud, and then based on the surface reconstruction in the reconstruction of curved surface as a reference to achieve the internal parts of the machine design. Again motor.Reverse engineering of the main purpose is to improve enterprise technical level, increase productivity and enhance economic
9、 competitiveness. Reverse engineering technology should be specific.In the following aspects:(1) The new parts design, mainly for the product modifications or copy form design.(2) For some parts of the design of the original copy, recreating the intention.(3) Damage or wear parts of reduction. When
10、parts of damage or tear and wear, can be directly used to reverse engineering method of reconstruction of the CAD model the damaged parts surface reduction and repair.(4) Digital model test. On the processing of parts after scans measured, reuse of reverse engineering constructed CAD model, through
11、the model and the will of the original design CAD model in computer data comparison, can detect errors and improving manufacturing precision.Reverse engineering system concrete implementation plan, make full use of theexisting system resources and processing equipment modernization imitation of the
12、form design, manufacture, as a new technology in the product design development and manufacturing, can greatly shorten the development cycle, the design technology in rapid product design development and the factors in numerical control processing surface is of great significance.附录B 外文文献译文对产品的实物模型进
13、行表面测量，按照反求工程的过程由测量数据点云完成产品模型的三维CAD建模，在工程实践中具有广泛的应用。反求工程(Reveme Engineering)是产品设计领域的一项关键技术，是根据已经存在的产品模型，反向推出产品设计数据(包括设计图纸或数学模型)的过程。具体来讲，反求工程的主要工作，就是针对已有的零件，利用三维数字化测量系统准确快速地获取点云数据，经过曲面重构、编辑、修改后，得到可以用于后续设计制造的CAD模型们。Imageware 是国内外应用广泛的反求软件，具有强大的测量数据处理、曲线曲面拟合、误差检测功能。可以处理几万甚至几百万的点云数据。根据这些点云数据可构造A级曲面具有良好的品
14、质和曲面连续性。Imageware软件在处理点云数据、特征曲线拟合方面具有一定优势，但其提供的曲面造型及辅助手段和功能完备的商用CAD/CAM 软件相比还有一定差距。CATIA V5 是目前应用广泛的高端CADCAMCAE软件系统，其反求功能主要由两个模块来完成：数字化编辑器模块(DSE)及快速曲面创建模块(QSR数字化编辑器模块DSE主要用来完成点云的输入、过滤、生成网格曲面、生成扫描线等工作；快速曲面创建模块QSR的功能则包括进一步生成曲线、曲面填充、切削处理、曲面分析等。在实际工作中，两模块交互使用，可以完成点云的快速处理、曲线与曲面重构、3D模型建立等。结合Imageware和CATI
15、A软件的使用，对通过光学测量系统所获取的手把外壳点云进行曲面重构，然后根据重构的曲面作为参照实现了对其内部零件电机机座的再设计。反求工程的主要目的是为了改善企业技术水平、提高生产率和增强经济竞争力。反求工程技术具体应，用在以下几个方面：(1)新零件的设计，主要用于产品的改型或仿形设计。(2)已有零件的复制，再现原产品的设计意图。 (3)损坏或磨损零件的还原。当零件损坏或磨损时，可以直接采用反求工程的方法重构出CAD模型对损坏的零件表面进行还原和修补。(4)数字化模型的检测，对加工后的零件进行扫描测量，再利用反求工程法构造出CAD模型，通过将该模型与原始设计的CAD模型在计算机上进行数据比较，可以检测制造误差，提高检测精度。逆向工程系统具体实施方案，充分利用高校现有的系统资源与加工设备进行现代化的仿形设计、制造，作为一项新技术在产品设计开发和制造方面，能大大地缩短设计开发周期，这一技术在产品快速设计开发和复杂型面数控加工方面具有重大的意义。
