Product Code: ICA11_1710

COAXID Omni-Directional Inner Diameter Laser Cladding Optic
Authors:
Frank Kubisch, Fraunhofer Institute Material and Beam Technology IWS; Dresden Germany
Steffen Nowotny, Fraunhofer Institute Material and Beam Technology IWS; Dresden Germany
Christoph Leyens, University of Technology; Dresden
Eckhard Beyer, University of Technology; -
Anja Techel, Fraunhofer Institute Material and Beam Technology IWS; Dresden Germany
Presented at ICALEO 2011

Laser ID materials deposition is applied for inner surface coatings of abrasively loaded tools, the generative fabrication of inner 3D structures of aero engines and gas turbines as well as the repair of local damages in gun barrels. The core element of the modularly designed ID cladding head presented here is a multi-jet coaxial powder nozzle. This nozzle concept permits a precise powder supply in any welding position, independently from gravity and welding direction. Thus, not only simple inner coatings are applicable, but also complex shaped metal structures can be generated in internal areas with restricted accessibility. All media supply, such as powder, shielding gas, cooling water, is safely packaged inside the processing head. The optical elements for shaping and focusing the laser beam are interchangeable and permit the use of disc, fiber as well as diode lasers up to 3 kW power. Currently, the minimum ID caliber is 4 inches, and the maximum immersion depth amounts to 40 inches. Current developments aim at the reduction of the minimum diameter to 2 inches and increased immersion depths to more than 10 feet.