复杂构件激光熔覆轨迹的干涉检测及修正

Interference detection and correction algorithm for laser cladding trajectory of complex components

针对激光扫描复杂构件受损面加工过程中,光束易与零件发生干涉的问题,提出复杂结构零件激光轨迹的干涉检测及修正算法。以逆向点云数据为基础,构建预期轨迹插补点数据结构。根据扫描轨迹采用法向投影建立碰撞域,快速排除非干涉激光束,粗检出可能发生干涉的路径点。构建四叉树索引精确搜索干涉点,计算干涉角,考虑光束半径补偿误差,确定相应修正量。满足再制造成形质量的前提下,调整光束姿态将干涉点转换为有效点,优化熔覆轨迹模型。设计干涉检测模块,实现用户可视化操作。该算法适用于曲面及结构复杂的零件,通过具体实例分析验证了该算法的可靠性与有效性。

Aiming at the problem that laser beam interferes with parts in the process of laser scanning of damaged surface for complex components,the interference detection and correction algorithm of laser trajectory for complex structural parts was proposed.On the basis of reverse point cloud data,the data structure of the expected track interpolation point was constructed.The collision region was established by normal projection according to the scanning trajectory,the non-interference laser beams were removed,and the possible interference points were roughly detected.The interference points were searched accurately by constructing the quadtree,the corresponding interferences were determined by considering the beam radius compensation error and computing the interference angle.Under the premise of satisfying the remanufacturing quality,the laser attitude was adjusted to convert the interference point into the effective point,and the cladding track model was optimized.The interference detection module was designed to realize a visual operating interface.The reliability and effectiveness of algorithm were verified by an example.