Modular system for surface welding inner surfaces of workpieces, comprising a laser beam and multiple modules

US8809730B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Steffen Nowotny · Radebeul, DE
• Siegfried Scharek · Freital, DE
• Frank Kublech · Dresden, DE
• Friedrich Kempe · Dresden, DE

Key dates

• Filing date: Jun 3, 2010
• Grant date: Aug 19, 2014
• Expiry date: Aug 4, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23K2101/12
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a modular system for overlay welding at inwardly disposed surfaces of workpieces using a laser beam. In this respect, a coating can be formed on inwardly disposed surfaces using a powdery welding material. It is the object of the invention to provide possibilities for the overlay welding or for the coating of inwardly disposed surfaces of workpieces with a variable immersion depth, increased flexibility and independence of direction in the processing. A feed for powdery welding material, a feed for protective gas and a feed for a coolant are present on a system in accordance with the invention. The system is formed with a coupling module for the laser beam, at least one beam guiding module for the laser beam and a processing module, which can be connected to one another. A collimated laser beam is directed via the coupling module through the beam guiding modules) onto an optical element focusing the laser beam on the surface of a workpiece to be processed. A nozzle having a discharge opening for the laser beam and the protective gas as well as a passage having a discharge opening for powdery welding material are present at the processing module.