共查询到18条相似文献,搜索用时 93 毫秒
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为满足CAD软件与快速成形领域的数据交换需要,提出了一种Parasolid数据的STL变换方法。利用Parasolid建模核心的PK-TOPOL-facet()函数将Parasolid模型按STL文件规则进行三角网格化,通过返回的拓扑信息构建三角面片与它的顶点和法向量的拓扑关系,并由此生成了STL文件。应用实例和Solidworks软件诊断表明,采用该方法可以将Parasolid文件变换为STL文件,生成的STL模型中无错误面和缝隙存在。 相似文献
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基于STL的数控加工方法在RP领域的应用 总被引:1,自引:0,他引:1
不同的商业CAD/CAM软件都拥有自己的文件格式,这些文件之间的格式转换常常会导致文件出错,如将错误文件导成STL格式,将会使文件修补非常容易。介绍了一种基于STL文件的数控加工方法,能使设计和加工人员从繁琐的文件修复工作中解脱出来,提高工作效率。 相似文献
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在对STL文件特点进行深入研究的基础上,利用VC++6.0环境下的MFC的串行化文件I/O操作机制,本文实现了对STL文件的读取.运用OpenGL的三角形面片绘制技术、光照模型、材料属性等渲染功能,对STL文件三维模型真实感图形可视化进行了研究,并实现了STL文件的真实感图形显示. 相似文献
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Chung-Shing Wang Teng-Ruey Chang 《The International Journal of Advanced Manufacturing Technology》2008,37(7-8):770-781
The main objective of this research is to identify ways to simplify the STL meshes, while simultaneously maintaining the accuracy
of the STL file. It demonstrates a technique to simplify large and complex STL triangular meshes and to optimise STL shape
for rapid prototyping and manufacture. STL mesh re-triangulation can be separated into two processes, i.e., mesh deletion
and mesh rearrangement. In the mesh deletion process, two kinds of weighted-value ratio algorithms can be chosen for determining
the suitable value of STL mesh deletion. A genetic algorithm that incorporated fitness functions was used for the optimisation
of the rearranged STL meshes. Two case studies of STL mesh reconstruction, which examine the effects of the algorithms, are
presented. These studies show that optimisation of the shape of the STL file reduces its size, resulting in a reduction of
the fabrication time and improvement of the rapid prototyping process. 相似文献
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S.-H. Huang L.-C. Zhang M. Han 《The International Journal of Advanced Manufacturing Technology》2003,21(1):15-19
The STL file, which is de facto standard for the rapid prototyping industries, has too large a file size. This paper proposes
an improved interface between CAD and rapid prototyping systems, i.e. a CS (compressed STL) file that has very low data storage
redundancies and is completely compatible with the STL file. The CS file is about a quarter of the size of the original binary
STL file, without any model information loss. This is very suitable for file transferring via the Internet. Removing coordinate
data of duplicate vertices, bit-compression technology, and a comparison of the size and compressed performance of the STL
and the CS are also discussed.
ID="A1"Correspondance and offprint requests to: Dr Li-Chao Zhang, Rapid Prototyping Building, State Key Laboratory of Plastic Forming Simulation and Die and Mould Technology,
Huazhong University of Science and Technology, Wuhan, Hubei, 430074, PR China. E-mail: elegantteac@yahoo.com 相似文献
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S. Boralingiah C. K. Chua T. Ong S. M. Chou 《The International Journal of Advanced Manufacturing Technology》1999,15(2):119-126
This paper presents the technique used for converting a 3D ArtCAM™ relief file into the stereolithography (STL) format. This
3D file is obtained from a 2D picture using a 3D CNC engraving software called ArtCAM™.
The problem is to convert the 3D relief files into an STL format without compromising the accuracy and details of therelief.
This paper discusses the size of the files which have been converted, and steps taken to reduce the file size by reducing
the number of triangles or facets in the STL file. The discussion involves the verification of the converted model by comparing
it with the original relief. The problems associated with the reduction of triangles when the file has been converted to STL
format are also discussed. 相似文献
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S.-H. Huang L.-C. Zhang M. Han 《The International Journal of Advanced Manufacturing Technology》2002,20(5):363-367
Although the STL (stereo lithography) file format is the de facto standard for the rapid prototyping industries, there are
always some defects in STL files, many of which are difficult to correct. Instead of correcting the defects of bad STL files
by a manual, interactive and complex approach with an STL file correction program, an error-tolerance slicing algorithm for
STL files is proposed in this paper. With the detailed analysis of complex defects such as cracks and non-manifold facets,
a complete topological structure for the facets model with defects is built and the layer is sliced effectively. The badly
sliced contour is processed by crack-tracking and non-manifold facet travelling methods to obtain a correct contour in a relatively
easy 2D way. 相似文献
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分割巨型STL格式形体文件的关键技术 总被引:1,自引:0,他引:1
为了避免巨型STL格式文件的读入错误和手工粘接带来的误差,研究了沿垂直于Z向将巨型STL格式文件分割成多个STL格式,连续依次成形的方法,研究了分割面轮廓的拓扑自理和分割的轮廓为三角形的算法。 相似文献