Patent ID: 8247733

Claim:
An arrangement for repairing blades of BLISK drums for gas turbines by laser deposition welding, comprising: a laser source and laser optics for generating a focused laser beam; a powder line connected to a powder reservoir for supplying a metal powder jet to a weld area to be melted by the laser beam; a welding apparatus of modular type, including a connection module which is connected to the laser source and in which the entering laser beam is shaped and deflected, a camera module connected to one side of the connection module for a CCD camera, and a beam-shaping module connected at an opposite side for shaping and focusing the laser beam, and a slender welding-head module adjoining the beam-shaping module with the laser beam and the powder line extending in longitudinal direction of said welding-head module and being directed in a deposition head towards a sideward exit port, and a protective-gas shielding module adjoining the exit port and being connected to a protective-gas source, forming an open protective-gas duct to protect a metal deposit applied to the blade edge against contamination during melting and cooling.