摘要
激光定向能量沉积增材制造技术具有高功率、高效率等优点,然而在成形大尺寸零件过程中易出现分层塌陷问题,严重影响成形件的尺寸精度和表面质量。为此,研究了基于体素点云的激光定向能量沉积路径规划算法,以解决成形过程中的塌陷问题。首先获取模型体素点云,利用正交设计试验确定CPC分割算法的最优参数,对表面体素点云进行分割、封闭、填充处理;随后基于点云边界提取算法和栅格地图法,开发了“回”字形扫描路径和正交“之”字形扫描路径,并采用RANSAC算法简化路径点;最后基于体素点云的定向能量沉积路径规划算法成形了阀门模具,并与现有LDED路径成形进行对比,现有路径成形区域1和区域3分别与水平面呈α=27°和β=33°塌陷且表面形貌较差,而提出的路径规划算法表现出较好的成形质量,验证了该算法的可行性。
Laser directed energy deposition additive manufacturing technology offers advantages such as high power and high efficiency.However,during the formation of large-scale parts,it is prone to layered collapse issues,which seriously affect the dimensional accuracy and surface quality of the formed components.To address this,a LDED path planning algorithm based on voxel point clouds is proposed to resolve the collapse problems during the forming process.First,the voxel point cloud of the model is obtained.Orthogonal design experiments are used to determine the optimal parameters of the CPC segmentation algorithm,which is then applied to segment,close,and fill the surface voxel point cloud.Subsequently,based on the point cloud boundary extraction algorithm and grid map method,a“meandering”scanning path and an orthogonal“zigzag”scanning path are developed,and the RANSAC algorithm is adopted to simplify path points.Finally,the valve mold is formed using the voxel point cloud-based directed energy deposition path planning algorithm.Compared with the existing LDED path forming method,in the existing path-forming,region 1 and region 3 collapse atα=27°andβ=33°with the horizontal plane respectively and have poor surface morphology,while the path-planning algorithm shows better forming quality,the feasibility of the proposed algorithm is verified.
作者
韩昌骏
陈子洋
徐申焘
蔡子豪
Trofimov Vyacheslav
杨永强
Han Changjun;Chen Ziyang;Xu Shentao;Cai Zihao;Trofimov Vyacheslav;Yang Yongqiang(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510641,China)
出处
《机电工程技术》
2025年第12期24-32,共9页
Mechanical & Electrical Engineering Technology
基金
中央高校基本科研业务费杰出青年项目(2024ZYGXZR079)
中国科协青年人才托举工程(2023QNRC001)
广东省自然科学基金面上项目(2022A1515010304)。
关键词
激光定向能量沉积
增材制造
三维点云
体素
路径规划
laser directed energy deposition
additive manufacturing
three-dimensional point cloud
voxel
path planning
作者简介
韩昌骏(1991-),男,博士,副教授,研究领域为金属增材制造,已发表论文80篇。
