Patent ID: 8952290
Filing Date: 2015-02-10
Classification: B23K,Y10T

Abstract:
1. A method for the thermal treatment of a workpiece, said method comprising: generating a laser beam using a laser source, supplying said laser beam to a laser head having a longitudinal axis and being movable relative to a surface of the workpiece in a working direction, wherein said laser beam exits via a nozzle towards the workpiece, the laser head having at least one optical deflection element deflecting the laser beam such that, when viewed in a working direction, the laser beam encloses a non-zero tilt angle relative to a normal to the workpiece surface, wherein the laser beam is supplied to the laser head by an optical fiber, said laser beam is collimated, said laser beam passes through the deflection element laterally offset to the longitudinal axis of the laser head and said laser beam is at the same time deflected and focused by said element onto the workpiece surface to a point on the longitudinal axis, and wherein the laser beam orates around the longitudinal axis of the laser head, wherein the laser beam is supplied to the laser head by the optical fiber via a feedthrough which comprises a gearing with a drive gear which is coaxially rotatable to the longitudinal axis of the laser head and which is connected in a 1:1 gear ratio to a driven gear with a driven shaft extending in parallel with the longitudinal axis of the laser head, the optical fiber being guided in an arc from the longitudinal axis of the laser head via the driven shaft into the laser head.