Measurement of complex freeform additively manufactured parts by structured light and photogrammetry

Low cost 3D printing of metals using filled polymer pellets

“…The possibilities offered by additive manufacturing are now benefiting many industries that can take advantage of greater freedom of shape and standardized tools. One example is the creation of complete components with a single printer using multi-material printing technologies [1] , [2] , or the manufacture of lighter parts with complex geometries for the aerospace [3] , [4] and automotive industries [5] , [6] . These sectors can also benefit from a significant reduction in costs as well as greater flexibility in their production chain, particularly thanks to reduced set-up times and a more sparing use of matter [7] , [8] , [9] .…”

On the Use of Quality Metrics to Characterize Structured Light-based Point Cloud Acquisitions

“…This type of metrics focuses on the inherent features of the PC. Catalucci et al [7] validated some of them on different point clouds coming from photogrammetry and structured-light scanner.…”

“…However, all those metrics can behave differently depending on the adopted technology: laser scanner, photogrammetry, or structured-light measuring for instance. Catalucci et al [7] compared the photogrammetry and structed-light measurements on additively manufactured parts and pro-posed quality indicators of PC that include measurement performance indicators and statistical indicators on the whole part measurement. However, their work focused on whole scans of the part that consist of many point clouds acquired from different scan positions and configurations.…”

The study of the roundness and cylindricity deviations of parts produced with the use of the additive manufacturing

“…Due to the complexity of the geometry, the characteristics of the surface layer, and the wide range of materials used in additive manufacturing, it is essential to choose the right methods to measure dimensions, geometric tolerances, and surface topography [16][17][18]. Contact measurements of surface topography may not be applicable in many cases due to the risk of scratching the surface by the mapping blade or the influence of temperature changes during long-term measurements [19,20].…”