摘要: |
针对目前运载火箭小直径导管依据实物样件进行手工弯制生产效率低、制造精度差、产品一致性难以保证等缺点,开展了依据实物样件的导管数字化制造技术研究。首先借助三维扫描仪对实物样件进行外形扫描,获取样件的点云数据;然后依据点云数据进行逆向建模并提取模型中各折弯点的空间三维坐标,实现导管实物样件到数字化样件的转化,形成导管数字样件库,再根据数字化模型进行导管数控弯制;最后,对弯制的产品进行外形扫描,将产品的点云数据与实物样件的点云数据比对,分析依据实物样件数字化制造的偏差。实例结果显示,实物样件和产品的点云模型形状的最大偏差为0.99mm,能够满足工程要求。 |
关键词: 实物样件;外形扫描;逆向建模;数字化样件;数字化检测 |
基金项目: |
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Digital Manufacturing Technology of Small Diameter Tube of Launch Vehicle Based on Physical Sample |
Wang Luyu1,Liu Shenglan2,Song Jianling3,Wang Cheng3,Wu Haonan3,Han Lei3
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1.Xi’an Aerospace Engine Company Limited, Xi’an 710100;2.1. College of Mechanical and Electrical Engineering, Nanjing 210016;3.2. Tianjin Long March Launch Vehicle Manufacturing Co., Ltd., Tianjin 300462
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Abstract: |
In view of the disadvantages of low production efficiency, poor manufacturing accuracy and difficult to guarantee product consistency, the digital manufacturing technology of small diameter tube of launch vehicle based on real samples was studied.?Firstly, the physical samples were scanned by 3D scanner, and the point cloud data of the samples were obtained.?Then, according to the point cloud data, the reverse modeling is carried out and the 3D coordinates of each bending point in the model are extracted to realize the transformation from the physical sample of the catheter to the digital sample, forming the database of the number of vessels, and then the numerical control bending of the catheter is carried out according to the digital model.?Finally, the shape of the bent product is scanned, the point cloud data of the product is compared with the point cloud data of the physical sample, and the deviation of digital manufacturing based on the physical sample is analyzed.?The results show that the maximum deviation of the point cloud model shape between the physical sample and the product is 0.99mm, which can meet the engineering requirements. |
Key words: physical samples;shape scanning;reverse modeling; digital sample;digital detection |