Lucas Hof, COO EGE Group, Concordia University
Rolf Wuthrich PhD, Associate Professor, Concordia University
Advances in Additive Manufacturing (AM) allow for high resolution fabrication of complex three dimensional structures. This enables the construction of tailored workpieces with virtually any shape. Promising applications for this approach are the development of lattices for orthopaedic bone implants, cooling channels inside molds for casting and lightweight parts for the aerospace industry. However, when using AM technologies such as Direct Metal Laser Sintering (DMLS), semi-melted beads appear to be attached to the workpiece, which is undesirable. They jeopardize mechanical properties and influence behaviour of the parts in the applications. The cleaning of the AM fabricated metal parts is a challenging task, especially narrow inner surfaces, due to its complex geometry. Electrochemical polishing (EP) provides an interesting approach as post-process to control the reduction of semi-melted beads / roughness and assure the parts to be particle free. This helps to ensure that the manufactured part is identical to the designed structure, allowing optimal performances. Recent developments on post-processing of AM parts will be presented.