共查询到18条相似文献,搜索用时 171 毫秒
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文章简要介绍了逆向工程的基本概念及其工作流程,利用逆向工程软件Imageware对自行车鞍座的点云数据进行处理,并创建边界线和特征曲线,然后利用三维软件Pro/E进行曲面拟合和CAD模型重构的反求设计,体现了逆向工程"点-线-面-实体"的实现过程,其中较为详细的阐述了点云数据的处理过程. 相似文献
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基于逆向工程在汽车车灯设计中的应用 总被引:1,自引:0,他引:1
介绍了逆向工程的基本概念、关键技术和逆向工程实施工作流程。应用逆向工程的相关概念,对汽车车灯进行逆向工程开发。分析了车灯轮廓边界及内部曲面的基本形状,并采用激光测量,对数据进行分块处理,去除坏点、杂点,对齐及重定位误差、变形误差和测量误差。对数据采用整合,直接对点云进行拼合,再重构出原型,实现了汽车前大灯CAD模型重构,并对灯罩大曲面的品质进行了优化分析处理。通过逆向设计可以大量地缩短设计周期,提高生产率。 相似文献
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基于逆向工程的鼠标外壳的数据重构和优化 总被引:1,自引:0,他引:1
通过鼠标外壳零件点云数据测量及曲面模型构建和UG零件的生成这一实例,介绍了逆向工程技术在自由曲面零件构建中的应用。重点介绍了利用逆向工程软件Imageware对点云数据处理的原理和方法,对曲线曲面的数学模型进行了论述,并对结果进行了优化。 相似文献
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基于激光扫描仪的曲面反求工程研究 总被引:1,自引:0,他引:1
通过对反求工程技术的阐述,介绍了用某激光扫描仪进行曲面反求的数据采集方法及光切法曲面拟合技术,给出利用逆向工程软件进行建模的实例并展示其应用效果. 相似文献
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基于Imageware和Moldflow的塑料产品逆向设计与注射成型分析 总被引:1,自引:1,他引:0
阐述了逆向工程设计的过程和方法,利用逆向软件Imageware对头盔点云数据进行处理,划分特征线网格和曲面重构,然后将Imageware软件逆向设计的头盔三维模型导入Moldflow/MPI软件中,对头盔注射成型过程进行模拟仿真和分析,并根据填充、冷却和翘曲分析结果优化了模具结构,获得了较高质量的产品,实现了产品与模具的快速设计。 相似文献
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"测量点云"的曲面重构 总被引:1,自引:3,他引:1
反求工程是一个能够大大减少产品开发时间的重要技术,本文论述了从坐标测量机得到的数据重建零件CAD模型的过程,包括:坐标测量、数据点预处理、曲线曲面重构与分析诊断等步骤。结合工程实践,应用反求工程软件Surfacer10.5,证明了反求工程理论的可行性并且实现与现有CAD/CAM系统的集成。 相似文献
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Reverse engineering of engine intake ports by digitization and surface approximation 总被引:2,自引:0,他引:2
Hong-Tzong Yau 《International Journal of Machine Tools and Manufacture》1997,37(6):855-871
This paper describes a research development for the design of engine intake ports using reverse engineering techniques. The background is typical of many automotive applications where digitization and reverse engineering become necessary when the design is subject to changes during production or testing. After careful analysis of the problem, CMM contact measurement was selected to digitize the complex intake ports. Part segmentation and semi-automatic scanning were applied to the digitization process. For the purpose of data reduction and surface approximation, a new approach to the fitting of rational B-splines was developed. This is because rational B-splines have more flexibility and can approximate complex geometry more accurately than traditional Bezier or B-splines. Furthermore, skinning—a cross-sectional design technique—was utilized to construct the surface to reduce the computation cost. Surface merging was also implemented to maintain the surface boundary continuity. Finally, the enclosed surface volume is produced and can be transferred to commercial CAD/CAM systems through IGES translation. Examples with complex intake ports were described to validate the approach. 相似文献
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Yifan Qie Sebastian Bickel Sandro Wartzack Benjamin Schleich Nabil Anwer 《CIRP Annals》2021,70(1):135-138
Reverse engineering can be considered as the methodological process of analyzing and reconstructing a digital model of a physical asset. It has gained considerable interest with the advent of sophisticated sensors and data processing technologies hence becoming an important enabler for the product digital twin. However, while existing approaches to reverse engineering focus on the mere geometric reconstruction, this paper presents a novel paradigm called function-oriented surface reconstruction, that is capable of reconstructing the underlying part and surface function and thus outperforms existing methods. The applicability of the presented method is demonstrated through a case study of a gearbox. 相似文献