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首页> 外文期刊>Optics and Lasers in Engineering >Laser line scanner aptitude for the measurement of Selective Laser Melting parts
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Laser line scanner aptitude for the measurement of Selective Laser Melting parts

机译：激光线扫描仪能力，用于测量选择性激光熔化部件

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摘要

When looking for any metrological verification of parts manufactured by metal laser printing with optical equipment, it is necessary to ensure the traceability of the measurements that can be obtained. The difficulty of this process lies in the fact that these measurements are obtained on point clouds captured from surfaces with high form errors and poor surface finishes, even when this type of surface usually undergoes processes to improve the surface finish, such as sandblasting. This research focuses precisely on the analysis of the metrological suitability of a laser line scanner (laser triangulation sensor) on parts manufactured by Selective Laser Melting (SLM).The study starts from the design of a test part specifically oriented to the printing process with SLM metal powder bed. This test part was printed in 17-4PH stainless steel and then sandblasted. The test part was measured in a Coordinate Measuring Machine (CMM), obtaining reference GD&T values. The measurement was carried out under pre-sandblasting ("as built") and post-sandblasting conditions, thus providing interesting information about the erosion rate of this post process. A state-of-the-art laser sensor was employed for the metrological comparison, mounted on the same available CMM that was used for contact measurements.In this research three analyses were carried out the quality of 3D metal printed parts with respect to CAD model, the effect of the sandblasting post-process, and the accuracy of the measurements obtained with the laser line sensor. In addition, this work conducts an in-depth study about the influence of point cloud treatment and filtering procedures, by comparing the filtering methods applied by different reverse engineering software packages. The study leads to the conclusion that filters based on the standard deviation of the point cloud are the best candidates in order to obtain laser measurements closer to the contact measurements.
机译：在寻找用光学设备制造的金属激光打印制造部件的任何计量验证时，有必要确保可以获得的测量的可追溯性。该过程的难度在于，在从具有高形式误差和表面光学差的曲面捕获的点云上获得这些测量，即使这种类型的表面通常经历工艺以改善表面光洁度，例如喷砂。本研究精确地侧重于通过选择性激光熔化（SLM）制造的零件上的激光线扫描仪（激光三角测量传感器）的测量性分析。该研究从测试部分的设计开始，用SLM为印刷过程。金属粉床。该试验部件印在17-4PH不锈钢中，然后印有喷砂。在坐标测量机（CMM）中测量测试部分，获得参考GD＆T值。测量在预喷砂（“如下”）和喷砂后条件下进行，从而提供有关该职位过程的侵蚀率的有趣信息。采用最先进的激光传感器用于计量比较，安装在与接触测量的相同可用CMM上。本研究三次分析是对CAD模型的3D金属印刷部件的质量进行了三种分析，喷砂后处理的效果，以及用激光线传感器获得的测量的精度。此外，通过比较不同逆向工程软件包应用的滤波方法，这项工作对点云处理和过滤程序的影响进行了深入的研究。该研究导致了基于点云的标准偏差的滤波器是最佳候选者，以便获得更接近接触测量的激光测量。

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  • 来源
    《Optics and Lasers in Engineering》 |2021年第3期|106406.1-106406.13|共13页
  • 作者

    Cuesta E.; Giganto S.; Alvarez B. J.; Barreiro J.; Martinez-Pellitero S.; Meana V;

  • 作者单位

    Univ Oviedo Dept Construct & Mfg Engn Campus Gijon Gijon 33204 Spain;

    Univ Leon Dept Mfg Engn Escuela Ingn Ind & Informat Leon 24071 Spain;

    Univ Oviedo Dept Construct & Mfg Engn Campus Gijon Gijon 33204 Spain;

    Univ Leon Dept Mfg Engn Escuela Ingn Ind & Informat Leon 24071 Spain;

    Univ Leon Dept Mfg Engn Escuela Ingn Ind & Informat Leon 24071 Spain;

    Univ Oviedo Dept Construct & Mfg Engn Campus Gijon Gijon 33204 Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Selective Laser Melting (SLM); laser line scanner; 3D metrology;

    机译：选择性激光熔化（SLM）;激光线扫描仪;3D计量;

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