| 主权项 |
1. A device for connecting two workpiece parts by means of laser beam welding via a predetermined weld seam pattern consisting of a plurality of weld seams, comprising a holder designed to position two workpiece parts extending in the x-y direction with respect to one another in the x, y and z directions of a Cartesian coordinate system, a laser beam source having its beam directed in the z direction on the holder, and thus on the workpiece parts positioned therein and spanning the device in the x direction, a movement device for the relative movement of the laser beam source with respect to the holder in the y direction, a pressure unit downstream of the laser beam source that is adjustable in the direction of the beam in the z direction relative to the holder, in which are provided a plurality of channels extending in the direction of the beam through the pressure unit, said channels having opposing channel walls on which at least a portion of said laser beam directed at the workpiece parts is reflected before impinging the workpiece parts and which are adapted to press the workpiece parts against one another in the z direction, and a memory and control unit, said channel walls being formed by a lattice-like array of parallel-plate-shaped first and second pressure elements oriented in the x and y directions, wherein at least one of said first pressure elements is oriented in the x direction and one in the y direction, and is rigid in the z direction, a plurality of second pressure elements being orientation-dependent in shortened second pressure elements that are not adapted to bear against the workpiece parts, and resilient second pressure elements with integrated means to compensate for tolerances in the z direction. |
