One of the biggest challenges for metal additive manufacturing is the inability to control surface quality. An approach to solve this problem is to use in-situ metrology systems. Fast data acquisition and a relatively long working distance make fringe projection a viable solution for in-situ metrology of layered metal additive manufacturing process [1], [2]. Surfaces created by metal additive processes, particularly the laser powder bed fusion (LPBF) process, are rough, porous and textured. The roughness and texture are the results of laser scanning and are related to the process parameters such as laser power, scan velocity, and hatch distance (laser step over). The combination of the parameters creates a unique surface texture with rich spatial frequency content. Figure 1 shows such a texture with a fused square on a layer of Inconel-625 metal powder. The laser scan path is along the vertical axis with a step over of 90 μm. The laser power is 290 W, and the scan speed is 110 mm/s.
展开▼
机译：金属添加剂制造的最大挑战之一是无法控制表面质量。解决此问题的方法是使用原位计量系统。快速数据采集和相对较长的工作距离使边缘投影成为分层金属添加剂制造方法的原位计量的可行解决方案[1]，[2]。由金属添加剂工艺产生的表面，特别是激光粉床融合（LPBF）工艺，是粗糙的，多孔和纹理的。粗糙度和纹理是激光扫描的结果，与过程参数有关，例如激光功率，扫描速度和舱口距离（激光阶梯）。参数的组合产生具有丰富空间频率内容的独特表面纹理。图1显示了在Inconel-625金属粉末层上的熔合正方形的纹理。激光扫描路径沿着垂直轴线，具有90μm的阶跃。激光功率为290W，扫描速度为110 mm / s。
展开▼
