Modulares System zum Auftragsschweissen an innenliegenden Oberflaechen von Werkstuecken mit einem Laserstrahl

(B3) Die Erfindung betrifft ein modulares System zum Auftragsschweissen an innen liegenden Oberflaechen von Werkstuecken mit einem Laserstrahl. Dabei kann mit pulverfoermigem Zusatzwerkstoff eine Beschichtung auf innen liegende Oberflaechen ausgebildet werden. Aufgabe der Erfindung ist es, Moeglichkeiten fuer das Auftragsschweissen bzw. die Beschichtung von innen liegenden Oberflaechen von Werkstuecken mit variabler Eintauchtiefe, erhoehter Flexibilitaet und Richtungsunabhaengigkeit bei der Bearbeitung anzugeben. An einem erfindungsgemaessen System sind eine Zufuehrung fuer pulverfoermigen Zusatzwerkstoff sowie jeweils eine Zufuehrung fuer Schutzgas und ein Kuehlmittel vorhanden. Es ist mit einem Einkoppelmodul fuer den Laserstrahl, mindestens einem Strahlfuehrungsmodul fuer den Laserstrahl und einem Bearbeitungsmodul, die miteinander verbindbar sind, gebildet. Dabei wird ein kollimierter Laserstrahl ueber das Einkoppelmodul durch das/die Strahlfuehrungsmodul(e) auf ein den Laserstrahl auf die zu bearbeitende Oberflaeche eines Werkstuecks fokussierendes optisches Element gerichtet. Am Bearbeitungsmodul sind eine Duese mit einer Austrittsoeffnung fuer den Laserstrahl und das Schutzgas sowie mindestens ein Kanal mit Austrittsoeffnung fuer pulverfoermigen Zusatzwerkstoff vorhanden.

DE 102009024957 B3 UPAB: 20101002 NOVELTY - The modular system for deposition welding on inner surfaces of workpieces with a laser beam (1), comprises a supply for powdered additive material, a supply for protective gas and a coolant, and a coupling module (2), a laser beam guiding module (5) and a processing module (6), which are connectable with one another. A collimated laser beam is directed to an optical element (4) focusing the workpiece surface to be processed over the coupling module through the beam guiding module. A nozzle (7) with a discharge opening for laser beam and protective gas is present at the processing module. DETAILED DESCRIPTION - The modular system for deposition welding on inner surfaces of workpieces with a laser beam (1), comprises a supply for powdered additive material, a supply for protective gas and a coolant, and a coupling module (2), a laser beam guiding module (5) and a processing module (6), which are connectable with one another. A collimated laser beam is directed to an optical element (4) focusing the surface of the workpiece to be processed over the coupling module through the laser beam guiding module. A nozzle (7) with a discharge opening for the laser beam and the protective gas and a channel with a discharge opening for the powdered additive material are present at the processing module, where the channel is aligned to the nozzle at an angle, so that the powdered additive material impinges on the surface of the workpiece to be processed in a focal spot of the laser beam. The discharge openings of the channel for the powdered additive material are arranged to each other at equal angle distances. The beam guiding module and the processing module are connectable with an extension module. The connections for the supply of protective gas, powdered additive material and coolant are present at the coupling module, extension module and/or beam guiding module and channels for powdered additive material are guided through the beam guiding module and the processing module, where the protective gas is guided to the discharge opening of the nozzle and the powdered additive material is guided up to the channels of the nozzle. An element reflecting the laser beam is present in the processing module, where the laser beam is deflected on the surface of the workpiece with the element over the discharge opening of the nozzle. The protective gas is disposed between the discharge opening of the nozzle and the reflecting element within the processing module, and is held in a retaining element, which is detachably connected with the processing module, using two frame elements that are pivoted around a rotating axis. The element focusing the laser beam is incorporated in the beam guiding module and/or the extension module. A focal length of the focusing element is changeable. The laser beam is focused with the reflecting element arranged in the processing module. A connection and a channel through the beam guiding module and the extension module are arranged to each channel for the additive material present in the processing module and the nozzle. A supporting element is arranged at the beam guiding module and/or extension module, and is formed by a rotatably mounted bead, roller or wheel. Nozzles or parts of the nozzle, with which the channels for the additive material are inclined at different angles, are exchangeably fastened at the processing module. The system is movable with the processing module and/or the workpiece relative to each other in two axes. The protective gas is directly guided into the beam guiding module, extension module or the processing module above or below the element focusing the laser beam. The protective gas is guided at the reflecting element in the processing module and through the discharge opening for the laser beam. A two-dimensional cross-table is arranged at the coupling module for the adjustment of the laser beam. The coolant is guided into the processing module through the channel over the beam guiding module for cooling the reflecting element and/or the nozzle. The rear side of the reflecting element is indirectly cooled with the coolant. The coolant is guided for cooling the nozzle in an adapter element at the processing module. USE - Modular system for deposition welding on inner surfaces of workpieces with a laser beam. ADVANTAGE - The modular system ensures precise, safe and simple deposition welding on the inner surfaces of the workpieces with high quality, high flexibility and high efficiency.