车削轴类零件的轮廓轨迹提取与真实感显示

Trajectory Curve Extraction and Realistic Display of Lathe Turning Shaft Parts

摘要:

图形数据信息的可视化一直是计算机图形学与可视化领域研究的重点内容,图形数据的挖掘、提取与显示都需要借助计算机图形学的知识来完成；本研究重点探讨了计算机图形真实感处理技术在计算机辅助数控车削自动编程加工系统中的应用,通过运用计算机图形处理技术编程提取DXF轴类零件的轮廓轨迹曲线,采用曲面构造算法作数据处理,生成零件真实感所需的三维数据模型,结合OpenGL内容对三维数据模型进行实体渲染,交互实现了数据模型的光照、材质、雾化等功能,通过旋转、透视变换,零件设计者可真实地观测到零件内部结构,从整体上对所设计的零件结构进行直观的认识；实验结果表明所开发的图形真实感程序系统能够高效的实现车削轴类件的渲染效果,具有较高的轮廓数据提取效率和真实感渲染能力。

Abstract:

Graphic data information visualization has been a research focus in computer graphics (CG)and visualization field, and graphical data mining, extraction and display are always done with computer graphics knowledge. This study probes into the computer graphics realistic processing technology in computer aided numerical control(NC) lathe turning processing automatic programming system, the application of programming by using computer image processing technology to extract the DXF trajectory curve, the outline of shaft parts and surface construction algorithm is adopted to improve the data processing, generating parts needed for the realistic 3D data model. Combined with OpenGL content for entity rendering of 3D data model, which interactively realized functions of light, material, spray, et al. Through the rotating, perspective transformation, part designers can truthfully observe parts' internal structure, with an intuitive understanding of the whole structure of the designed parts. The experiment results show that the development of graphics realistic application system can efficiently realize lathe turning rendering of shaft parts, and it has the high profile data extraction efficiency and realistic rendering capabilities.