Bystronic Laser AG

A beam machining head ( 10; 100; 200 ) for beam cutting of a workpiece is provided, having an interface ( 12 ) for an energy beam source ( 14; 14, 201 ) for generating a focused machining energy beam ( 15; 206 ) selected from a particle beam source, a fuel fluid beam source, a plasma beam source and/or a source for electromagnetic radiation; an exit opening ( 16 ) for the machining energy beam bounded by an opening edge ( 18 ); an optical detector unit ( 19 ) for recording at least one image of an electromagnetic radiation ( 17 ) emitted from the workpiece ( 11 ) through the exit opening into the beam machining head ( 10; 100; 200 ) and induced in the workpiece by the machining energy beam; and a monitoring unit ( 30 ) connected in a data-transmitting manner to the optical detector unit for monitoring a positional relationship between a centre of the emitted electromagnetic radiation and the exit opening, wherein the monitoring unit ( 30 ) has: a first determination module for determining at least one position ( 180; 182 ) of the exit opening in the at least one image; a second determination module for determining at least one position ( 170 ) of the centre of the emitted electromagnetic radiation in the at least one image; and a third determination module for determining the positional relationship between the at least one position ( 170 ) of the centre of the emitted electromagnetic radiation and the at least one position ( 180; 182 ) of the exit opening ( 16 ). A beam machining device and a method for beam cutting are further disclosed.

A laser machining tool is disclosed. The laser machining tool includes a machining device that has a movable carriage. A machining unit, which includes a machining head, is arranged on the movable carriage. The machining head is configured to direct a laser beam of laser light onto a workpiece to be machined. A flexible fibre cable for supplying the laser light from a laser light source is connected to the machining head. The machining unit can be moved linearly together with the machining head relative to the movable carriage. The flexible fibre cable is fixed to the machining unit with a first fixing means and fixed to the movable carriage with a second fixing means. The flexible fibre cable is freely movable for enabling a linear movement of the machining unit relative to the movable carriage in a predetermined guide plane between the first and second fixing means.

An optical unit fora laser beam for laser machining of a workpiece is disclosed. With particular application to a laser beam, the optical unit may be applied to a high-power laser beam and comprise an optical element for the optical imaging of the laser beam, and two protective glasses that are transparent for the laser beam, the outer edges of which protective glasses being enclosed in an airtight manner by a holder in such a way that they form an interior space with the holder, the optical element also being arranged in the interior space. A laser machining device is also disclosed.

The present disclosure relates to a method of calculating process parameters. which are optimized for processing a workpiece with specific material properties by means of a laser machine, comprising the method steps of: determining material properties for which the process parameters should be optimized; determining preconfigured initial process parameters; executing a re-optimization algorithm until a target objective function is minimized or maximized for calculating optimized material-specific process parameters by accessing a storage with a statistical model, wherein the statistical model is based on Bayesian optimization using Gaussian Processes as priors.

The invention relates to a machining head ( 100 ) for the laser machining of a workpiece, having a first interface ( 102 ) for a machining laser source for emitting a machining laser beam; a second interface ( 104 ) for an illumination light source for emitting a linearly polarised illumination light beam; an exit opening ( 112 ) for the machining laser beam and the illumination light beam; a third interface ( 106 ) for a detector device for detecting the illumination light beam reflected from the workpiece; and guide optics ( 116, 117 ) for at least partial coaxial guiding of the emitted illumination light beam through the exit opening and of the illumination light beam reflected from the workpiece, through the exit opening, to the third interface. The guide optics have a polarising beam splitter ( 116 ) for guiding at least part of the emitted linearly polarised illumination light beam in the direction of the exit opening; and a retardation plate ( 117 ) disposed between the polarising beam splitter and the exit opening. The invention also relates to a method for laser machining of a workpiece.

The invention relates to a laser machining tool ( 100 ), in particular a laser cutting tool, comprising a machining device ( 1 ) which is guided on a bridge ( 10 ) and has a movable carriage ( 2 ), on which a machining unit ( 3 ) is arranged, which has a machining head ( 4 ), which is designed in such a way that it directs a laser beam of laser light onto a workpiece to be machined, wherein a flexible fibre cable ( 6 ) for supplying the laser light from a laser light source ( 16 ) is connected to the machining head ( 4 ) and the machining unit ( 3 ) can be moved linearly together with the machining head ( 4 ) relative to the movable carriage ( 2 ). The fibre cable ( 6 ) is fixed to the machining unit ( 3 ) with a first fixing means ( 7 ) and fixed to the movable carriage ( 2 ) with a second fixing means ( 8 ), wherein the fibre cable ( 6 ) is freely movable for enabling a linear movement of the machining unit ( 3 ) relative to the movable carriage ( 2 ) in a predetermined guide plane (G) between the first and second fixing means ( 7, 8 ).

The invention relates to a method for collision avoidance of a laser machining head ( 102 ) in a machining space ( 106 ) of a laser machining tool ( 100 ), having the steps of: —Monitoring a workpiece ( 112 ) in the machining space ( 106 ) with at least one optical sensor; —Capturing images of the workpiece ( 112 ); —Detecting a change in an image of the workpiece ( 112 ); —Recognising whether the change comprises an object standing upright relative to the workpiece ( 112 ); —Checking for a collision between the upright object and the laser machining head ( 102 ) based on a predetermined cutting plan and/or the current position ( 1016 ) of the laser machining head; —Controlling the drives for moving the laser machining head ( 102 ) for collision avoidance in case of recognised risk of collision.

A method of laser machining a workpiece is provided, with a) generation of a machining laser beam and imaging of the machining laser beam on the workpiece with at least one optical element; b) machining of the workpiece with the imaged machining laser beam and generation of a cutting gap in the workpiece; c) monitoring of at least one geometric parameter of the cutting gap during step b); and d) regulating the monitored geometric parameter of the cutting gap during step c) for harmonisation with a target value of the geometric parameter of the cutting gap. Further provided is an apparatus for laser machining a workpiece.

An optical unit fora laser beam for laser machining of a workpiece is disclosed. With particular application to a laser beam, the optical unit may be applied to a high-power laser beam and comprise an optical element for the optical imaging of the laser beam, and two protective glasses that are transparent for the laser beam, the outer edges of which protective glasses being enclosed in an airtight manner by a holder in such a way that they form an interior space with the holder, the optical element also being arranged in the interior space. A laser machining device is also disclosed.

A beam shaper ( 1 ) for shaping a laser beam is provided, including a first beam shaping section ( 2 ) designed for shaping a central part of the laser beam, and a second beam shaping section ( 3 ) designed for shaping a peripheral part of the laser beam. Moreover, a device for laser beam treatment of a workpiece and a method for laser beam treatment of a workpiece are provided.