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根据激光熔覆工艺特性,针对曲面零件提出了一种路径规划方法,采用三维扫描仪获取熔覆曲面点云数据,应用点云切片法得到熔覆路径上的点集。利用等弓高得到稀疏化轨迹点集,运用非均匀有理B样条(NURBS)曲面拟合得到加工点的法矢量,并按该方向偏置一定距离得到枪头运动轨迹点。通过熔覆实验并对实验样件作定量分析,发现曲面上的熔覆层质量良好,从而验证了该方法的可靠性和实用性,该研究为其他曲面零件的熔覆再制造修复提供了一定的参考。
According to the characteristics of the laser cladding process, a path planning method is proposed for the curved surface parts. The point cloud data of the cladding surface is obtained by a three-dimensional scanner. Point cloud slicing method is used to obtain the point set on the cladding path. The set of sparse trajectory points is obtained by using the bow heights. The normal vector of the machining point is obtained by fitting the surface of a non-uniform rational B-spline (NURBS), and the trajectory point of the pipette tip is obtained by offsetting a certain distance according to the direction. Through the cladding experiments and quantitative analysis of the experimental samples, it is found that the quality of the cladding layer on the curved surface is good, which verifies the reliability and practicability of the method. The study provides a certain method for the cladding and remanufacturing of other curved surface parts The reference.