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Italian scientists have developed an additive system that can eliminate defects in the 3D printing process by selective laser fusion or sintering of metal powders.
Work on the project is carried out by employees of the Faculty of Mechanical Engineering of the Milan Polytechnic University. According to scientists, they were able to design a system that corrects defects in 3D-printed metal products during the construction process. The essence of the idea is quite simple and subtractive: in case of errors, the 3D printer simply rolls the process back using the built-in grinding system - an abrasive roller that rotates at a speed of up to four thousand rotations per minute and removes layers with a thickness of 10-20 microns. To detect defects in an experimental system called Penelope, a video surveillance and analysis system in the infrared spectrum is provided.
“There are a number of possible sources and various types of defects, such as porosity, residual stress, various deformations, microstructural inhomogeneities, and so on. Defects arising in the process of 3D printing not only negatively affect the quality and efficiency of the final product, but also increase production costs in terms of cost and time spent. This study is aimed at developing the first additive system that can guarantee to give a high-quality result on the first try, ”the developers explain.
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