An Algorithm for Computing Intersection of Complex Surface Parts and Its Application

Zheng Peng-fei, Liu Qing, Lin Da-jun, An Qi
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Abstract

Applying the principle of rapid prototyping manufacturing process, using the method of slice evaluation of point cloud surface model, a complex surface parts intersection computing algorithm is proposed. The intersection of the surfaces are calibrated with the color attribute, and the 3D point cloud surface model is simplified by dimension reduction using layering and slicing. Binary raster image is used to replace the point cloud data, and the distance computing of the three-dimensional point is converted into a Boolean operation of the color map, which greatly reduces the computational complexity and variability. Through the iterative refinement of the grating grids, the intersection feature points of the surface are obtained step by step. The experimental results of point cloud model depict that the algorithm is effective, simple, stable and reliable, and it is applied to the flattening and nesting, and welding path planning in manufacturing, which further explains the wide adaptability of surface intersection algorithm.
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一种复杂曲面零件交点计算算法及其应用
应用快速原型制造工艺原理,采用点云曲面模型的切片评估方法,提出了一种复杂曲面零件相交计算算法。利用颜色属性对点云曲面的交点进行标定,采用分层和切片的降维方法对三维点云曲面模型进行简化。采用二值栅格图像代替点云数据,将三维点的距离计算转换为彩色图的布尔运算,大大降低了计算复杂度和可变性。通过对光栅网格的迭代细化,逐步得到曲面的相交特征点。点云模型的实验结果表明,该算法有效、简单、稳定、可靠,并将其应用于制造中的放平、嵌套和焊接路径规划,进一步说明了曲面相交算法的广泛适应性。
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