H.Freisse, M.Stroht, N.Brocke: Novel Diode Laser with Coaxial Beam Guidance for Deposition Welding and Additive Manufacturing. Laser Magazine, Issue 4/2015 (BIAS)
Nils Brocke, Michael Schnick, Ronald Jüngling, Volker Krink: 3D Deposition Welding with a Coaxial Construction of Diode Laser and Central Filler Material Feed. 11th Symposium about Wear Protection of Components by Deposition Welding. Halle (Saale), 15 and 16 June 2016
H.Freisse, H. Köhler, C. Thomy, F. Vollertsen, N. Brocke, M. Schnchn: Process Monitoring System for a Novel Direct-Radiating Diode Laser with Coaxial Beam Guidance. Welding and Cutting Reports 68 (2016) Issue 6 S61 + S62
Optimising Wear Protection Layers
For our wear protection customers, we develop plasma and laser technologies for the purpose of deposition welding of wear protection layers or for repairing components and tools. The focus here is on the process characterisation and optimisation. It is specifically about the adaptation of the energy input, the material supply and the gas shielding, as well as the analysis and avoidance of process instabilities. Owing to our high-performance materials laboratory, we are capable of analysing and documenting the achieved coating properties during the experiment, e.g. microstructures, and mixture or coating irregularities.
Developing an Innovative Temperature Field Measuring System
Process monitoring system for an innovative direct-radiating diode laser with coaxial beam guidance (ZIM funding number ZF4124701DF5, funding period 01.03.2016 – 30.09.2017)
The aim of the project is to develop and to test an innovative non-axial and affordable temperature field measurement system for the purpose of process monitoring and documentation for laser powder welding and for the coaxial laser processing head of Oscar PLT. In the course of the project, lenses are integrated into the machining head, plus various temperature field measurement possibilities are compared and evaluation algorithms are developed. This project is conducted in collaboration with the Bremen Institute for Applied Beam Technology (BIAS).
Coating Technologies in the High Performance Area and 3D Area
Plasma-powder deposition welding or Plasma-Transferred Arc (PTA) welding is a decades-long established coating technology. With OSCAR PLT, we further develop this technology, specifically in the high-performance range of up to 400 A. By implementing two separate powder feeders, considerably higher powder distribution rates can be achieved, and graded powder compositions in the process possible will be feasible. Laser deposition welding enables deposition welding with high-precision energy supply for minor dilution, distortion and residual stress. The developed technology in our facility is based on a coaxial (fully 3D capable) machining head with centric material feed and circular direct diode modules. The head is highly flexibly applicable with wire and powder materials. It has a phenomenal shielding gas flow and powder efficiency.