Process monitoring of additive manufacturing by using optical tomography
2015; American Institute of Physics; Linguagem: Inglês
10.1063/1.4914606
ISSN1935-0465
AutoresG. Zenzinger, Joachim Bamberg, Alexander Ladewig, Thomas Hess, Benjamin Henkel, Wilhelm Satzger,
Tópico(s)Additive Manufacturing and 3D Printing Technologies
ResumoParts fabricated by means of additive manufacturing are usually of complex shape and owing to the fabrication procedure by using selective laser melting (SLM), potential defects and inaccuracies are often very small in lateral size. Therefore, an adequate quality inspection of such parts is rather challenging, while non-destructive-techniques (NDT) are difficult to realize, but considerable efforts are necessary in order to ensure the quality of SLM-parts especially used for aerospace components. Thus, MTU Aero Engines is currently focusing on the development of an Online Process Control system which monitors and documents the complete welding process during the SLM fabrication procedure. A high-resolution camera system is used to obtain images, from which tomographic data for a 3dim analysis of SLM-parts are processed. From the analysis, structural irregularities and structural disorder resulting from any possible erroneous melting process become visible and may be allocated anywhere within the 3dim structure. Results of our optical tomography (OT) method as obtained on real defects are presented.
Referência(s)