Research on trajectory planning of complex curved surface parts by laser cladding remanufacturing
Research on trajectory planning of complex curved surface parts by laser cladding remanufacturing
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DOI：
10.1007/s00170-018-1737-z
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发表时间：
2018-02
期刊：
影响因子：
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通讯作者：
Xinlong Wang;Wenlei Sun;Ying Chen;Jianjie Zhang;Yong Huang;Haibo Huang
中科院分区：
文献类型：
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作者：
Xinlong Wang;Wenlei Sun;Ying Chen;Jianjie Zhang;Yong Huang;Haibo Huang
提出了一种基于激光熔覆工艺特点的路径规划方法，提高了表面零件的加工效率和质量。激光与粉末相互作用的同轴模型和同轴送粉实验确定了激光熔覆过程的有效散焦量范围。利用三维扫描仪获取熔覆表面的点云数据，利用等弓高稀疏轨迹点集，采用点云切片的方法得到熔覆路径上的点集。然后将NURBS(非均匀有理B-Splines)曲面拟合到包层曲面上，分析其微分几何特征，确定向量加工点，并将其偏置到一定距离，得到火炮头部的弹道点。机器人的柔性加工特性决定了连续变高度激光枪头的复杂运动，同时使激光枪头与熔覆表面加工点法向量保持在同一直线上。通过熔覆实验和对实验样品的定量分析，获得了良好的曲面熔覆层质量。验证了该方法的可靠性和实用性，为其他曲面零件的再制造提供了很好的参考。
A method of path planning based on laser cladding process characteristics was proposed, which can improve the machining efficiency and the quality of surface parts. The effective defocusing amount range of the laser cladding process is determined by the coaxial model of laser and powder interaction and the coaxial powder feeding experiments. The points cloud data of the cladding surface was obtained by the 3D scanner and the point set on the cladding path was obtained by the point clouds slicing method, utilizing equal bow height sparse trajectory point set. And then the NURBS (non-uniform rational B-splines) surface was fitted to the cladding surface and its differential geometrical characteristics were analyzed to determine the vector processing point and biased it to a certain distance to obtain the trajectory point of the gun head. The complex movement of laser gun head with continuous variable altitude is determined by the robot flexible processing characteristics, meanwhile, keeping the laser gun head and the cladding surface processing point normal vector on the same line. From the cladding experiments and the quantitative analysis of the experimental samples, good quality of the cladding layer on the curved surface was achieved. Also, the reliability and practicability of the method were verified, thus providing a good reference for remanufacturing of other surface parts.