Patent EP-2409808-A1 (EP)
Inventor: IMBODEN ERNEST
IPC: B23K26/04
Filed: 2010-07-22
Abstract: The laser processing machine such as a laser cutting machine, comprises: a work table for receiving a work piece to be processed; a work arm (1) with a laser cutting head (2), which comprises a nozzle receiving device (7) and a nozzle arranged in the nozzle receiving device; main drives for moving the work arm and/or the laser cutting head in the directions of X-Y-Z axes for processing the work piece; and an alignment unit for adjusting the laser beam. The nozzle of a laser beam (11) is directed onto the work piece. The laser processing machine such as a laser cutting machine, comprises: a work table for receiving a work piece to be processed; a work arm (1) with a laser cutting head (2), which comprises a nozzle receiving device (7) and a nozzle arranged in the nozzle receiving device; main drives for moving the work arm and/or the laser cutting head in the directions of X-Y-Z axes for processing the work piece; and an alignment unit for adjusting the laser beam. The nozzle of a laser beam (11) is directed onto the work piece. An adjusting station is provided in an effective working region of the main drives of the work arm, and comprises a receiving unit for fixing the nozzle and/or the nozzle receiving device during centering of the nozzle. The alignment unit has a head element provided in the laser cutting head. The head element: receives the nozzle and/or the nozzle receiving device and is slidable in the X-Y directions by the existing main drives of the laser cutting machine without additional adjustment device; and is fixed against movement in a selected position within the laser cutting head by a releasable clamping device, releasable during the nozzle centering step in the adjusting station (3). The laser cutting head has a split design that consists of an upper head portion and a lower head portion, where the laterally displaceably arranged head element in the lower head portion as a cylindrical core piece is formed that is coaxial with the nozzle receiving device. The lower head portion has an outer housing, which is movably fixed through the upper head portion of the working arm attached to be movable. The releasable clamping device has an annular piston, which is an axial annular space of the laser cutting head of a housing and the head laterally movable element of a core in a basic position-fixing, the fixing of the head laterally movable element of a central part solving second position and back, is movable. The annular piston such as pneumatic is actuated in a sense of release, and on the one hand by a clamping surface with the laterally movable head element of the core, on the other hand with an acting for the purposes of fixing clamping unit is connected. The clamping surface is formed as a lower surface of an inner flange of the annular piston and the other clamping surface as an upper surface of an outer flange of the central part. The outer flange of the central part and/or the inner flange of the annular piston consists of segments that are arranged along a circumference spaced with a respective distance. The clamping unit of the releasable clamping device consists of a spring unit from three axial spring assembly. The laser processing machine is stored with the nozzle receiving in the lower head portion relatively movable head element of the core with a radial clearance whose value is 1-5 mm. The head element of the core and the coaxially movable nozzle receiving device are formed as a single integrated element. The laser processing machine is equipped with a work table to hold the workpiece to be machined. A camera system is provided in the adjusting station below the recording unit for fixing the nozzle, and is provided with a target for carrying shooting by the laser beam, a removable absorption plate and a height-adjustable camera. The camera of an image processing unit is assigned for detecting the relative position of penetration holes and/or detecting and comparing the surface extension of the penetration holes.