激光技术, 2017, 41 (5): 718, 网络出版: 2017-09-21   

自由曲面熔覆路径的点云切片算法研究

Research of point cloud slicing algorithm for free-form surface laser cladding trajectory
作者单位
新疆大学 机械工程学院, 乌鲁木齐 830047
摘要
为了解决复杂曲面熔覆过程中路径规划的难题, 采用了基于点云切片法生成熔覆轨迹的算法, 运用逆向技术完成零件的反求, 提取模型的点云数据; 并以切平面与点云带宽平面的交点确定激光束扫描轨迹, 根据等弓高误差法确定加工点, 对路径模拟仿真;然后以45#钢作为试验基材, 在表面熔覆一层铁基粉末, 进行自由曲面零件的激光熔覆路径规划研究。结果表明,使用显微硬度仪测得熔覆层硬度稳定在390HRC, 为基材的1.6倍左右;熔覆层组织均匀、结构致密、无明显气孔及裂纹, 与基材形成了良好的冶金结合。该方法熔覆结果良好, 验证了轨迹规划的可行性。
Abstract
In order to solve the path planning problem of complex surface cladding process, the cladding track algorithm was generated based on point cloud slicing method, the reverse of the parts was completed based on reverse technique and point cloud data of model was obtained. The scanning trajectory of laser beam was determined by the intersection point of tangent plane and point cloud. The processing point was determined by equal arch height error method. After path simulation, 45# steel was used as the experimental substrate, and a layer of Fe-based powder was coated on the surface to study the laser cladding path planning of the free form parts. The results show that the hardness of the cladding layer stabilizes at 390HRC and 1.6 times of that of the substrate after the measurement of microhardness tester. The cladding layer has uniform structure, compact structure, no obvious pores and cracks, and has a good metallurgical bond with the substrate. The method has good cladding results and verifies the feasibility of trajectory planning.

黄海博, 孙文磊, 黄勇, 陈影. 自由曲面熔覆路径的点云切片算法研究[J]. 激光技术, 2017, 41(5): 718. HUANG Haibo, SUN Wenlei, HUANG Yong, CHEN Ying. Research of point cloud slicing algorithm for free-form surface laser cladding trajectory[J]. Laser Technology, 2017, 41(5): 718.

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