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提出一种基于切口特征自动识别的五轴三维激光切割轨迹自动生成方法。采用STL模型,通过切口特征自动识别实现了切口特征的自动选取,并通过对切口边环的偏置实现了激光束半径补偿;利用切口边环的离散点确定了激光束入射点位置,并利用激光束入射点所在三角面片的法向量确定了激光头姿态;算法应用实例表明,该方法能够实现切口特征的自动选取和激光束半径补偿,并能保证激光头始终与工件表面保持垂直,软件系统运行稳定可靠。
A method of automatic generation of five-axis 3D laser cutting trajectory based on automatic recognition of incision features is proposed. The STL model was used to automatically select the incision features by automatic recognition of the incision features. The laser beam radius compensation was achieved by offsetting the edge of the incision edge. The incident point of the laser beam was determined by using the discrete points of the incision edge ring. The normal vector of the triangular facets where the laser beam incident point is located determines the attitude of the laser head. The application of the algorithm shows that the method can automatically select the incision features and compensate the laser beam radius, and ensure that the laser head is always perpendicular to the surface of the workpiece. The system is stable and reliable.