关键词: 逆向工程, 点云, 刀轨修改, 刀轨生成

Abstract: In reverse engineering (RE), the point cloud usually needs to be modified and machined repeatedly to meet the configuration needs. If only the CL points in the modified region are recalculated, the time of tool path regeneration will reduce significantly. A point cloud design modification tool path regeneration algorithm is proposed for three-axis CNC machining. Firstly, the CL points in the modified region were identified and line-by-line recalculated, and new CL points were added to meet tolerance requirement. The scallop height values for the modified region were then calculated. If they were greater than the given value, new lines of CL points were added to maintain the required surface finish. The algorithm was tested on point cloud. When the modified region is samall, the algorithm costs less time than regenerating all tool path.

Key words: reverse engineering, point cloud, tool-path modification, tool-path generation