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首页> 外文会议>AOPC 2017: 3D Measurement Technology for Intelligent Manufacturing >Method of Surface Error Visualization Using Laser 3D Projection Technology
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Method of Surface Error Visualization Using Laser 3D Projection Technology

机译：使用激光3D投影技术的表面误差可视化方法

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摘要

In the process of manufacturing large components, such as aerospace, automobile and shipping industry, some important mold or stamped metal plate requires precise forming on the surface, which usually needs to be verified, if necessary, the surface needs to be corrected and reprocessed. In order to make the correction of the machined surface more convenient, this paper proposes a method based on Laser 3D projection system, this method uses the contour form of terrain contour, directly showing the deviation between the actually measured data and the theoretical mathematical model (CAD) on the measured surface. First, measure the machined surface to get the point cloud data and the formation of triangular mesh; secondly, through coordinate transformation, unify the point cloud data to the theoretical model and calculate the three-dimensional deviation, according to the sign (positive or negative) and size of the deviation, use the color deviation band to denote the deviation of three-dimensional; then, use three-dimensional contour lines to draw and represent every coordinates deviation band, creating the projection files; finally, import the projection files into the laser projector, and make the contour line projected to the processed file with 1:1 in the form of a laser beam, compare the Full-color 3D deviation map with the projection graph, then, locate and make quantitative correction to meet the processing precision requirements. It can display the trend of the machined surface deviation clearly.
机译：在制造大型零件的过程中，例如航空航天，汽车和航运业，一些重要的模具或冲压金属板需要在表面上进行精确成型，通常需要进行验证，必要时还需要对表面进行校正和重新加工。为了使加工表面的校正更加方便，本文提出了一种基于Laser 3D投影系统的方法，该方法采用地形轮廓的轮廓形式，直接显示实际测量数据与理论数学模型之间的偏差（ CAD）。首先，测量加工的表面以获得点云数据和三角形网格的形成；其次，通过坐标变换，将点云数据统一为理论模型，并计算三维偏差，根据偏差的正负号和大小，用色差带表示三级偏差。尺寸然后，使用三维轮廓线绘制并表示每个坐标偏差带，从而创建投影文件。最后，将投影文件导入激光投影仪中，以激光束的形式将轮廓线以1：1的比例投影到处理后的文件中，将全彩3D偏差图与投影图进行比较，然后找到并定位进行定量校正以满足加工精度要求。它可以清楚地显示加工表面偏差的趋势。

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