Patent ID: 8981256
Filing Date: 2015-03-17
Classification: B23K,B29C,B29K

Abstract:
1. Apparatus for joining two workpiece parts to form a workpiece along a weld extending in at least two dimensions by transmission welding, having a receptacle which is dimensioned such that two workpiece parts extending in a planar manner in X and Y direction are positioned relative to one another in the X direction, Y direction and Z direction of a Cartesian coordinate system, having a laser beam source which is aligned in the radiating direction thereof on the receptacle and, therefore, on workpiece parts positioned therein, which laser beam source comprises a plurality of individually controllable laser beam emitters which collectively form a line array which is oriented in X direction, having a transporting device for transporting the laser beam source relative to the receptacle in Y direction, and having a storage-and-control unit for spatially resolved operation of the laser beam emitters depending on the position of the receptacle in Y direction, and further comprising a homogenizer arranged downstream of the laser beam source in the radiating direction, which homogenizer has a carrier in which is provided at least one reflection channel with a channel cross section which is adapted to the course of the weld and a channel width which is adapted to the width of the weld and a channel length in Z direction, and in that the reflection channel has oppositely located reflecting channel wall surfaces at which at least a portion of at least one laser beam coming from the laser beam source is repeatedly reflected back and forth.