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1.发明公开公开(公告)号：US20240131617A1
公开(公告)日：2024-04-25
申请号：US18402782
申请日：2024-01-03
申请人： TRUMPF Laser GmbH
CPC分类号： B23K26/032 , B23K26/21 , B23K26/705
摘要： A method for monitoring a laser welding process for welding workpieces by a welding laser beam is provided. The method includes, during the laser welding process, directing a measuring beam of an optical coherence tomograph onto an interaction area in which the welding laser beam interacts with the workpieces. The measuring beam penetrates the workpieces in the interaction area in a through weld of the workpieces. The measuring beam penetrating the workpieces is incident on a reference element. The method further includes acquiring measured values using the measuring beam, defining a first measured value range corresponding to detection of a material of the workpieces, defining a second measured value range corresponding to detection of the reference element, and determine a ratio of a number of measured values lying in the first measured value range and a number of measured values lying in the second measured value range.
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公开(公告)号：US20230387640A1
公开(公告)日：2023-11-30
申请号：US18448217
申请日：2023-08-11
申请人： TRUMPF Laser GmbH
发明人： Jonathan Brons , Rainer Flaig , Dirk Sutter , Ivo Zawischa
CPC分类号： H01S3/0092 , H01S3/10015 , H01S3/0085 , H01S3/1302
摘要： A method for generating output laser pulses from input laser pulses includes causing the input laser pulses to temporally successively pass through an optical component with temperature-dependent power efficiency. The optical component is heated by the passing of the input laser pulses. The input laser pulses emerge from the optical component as output laser pulses. The method further includes calculating a current temperature or a current temperature difference of the optical component, or a temperature-dependent current parameter based on all preceding input laser pulses or output laser pulses that have contributed to the heating of the optical component, and setting a power of a current input laser pulse based on the calculated current temperature, or the calculated current temperature difference, or the calculated current parameter, so that an associated output laser pulse has a pulse energy that deviates from a predefined pulse energy by less than 5%.
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公开(公告)号：US20230330770A1
公开(公告)日：2023-10-19
申请号：US18337071
申请日：2023-06-19
申请人： TRUMPF Laser GmbH
发明人： Daniel Grossmann , Malte Kumkar
IPC分类号： B23K26/064 , B23K26/0622
CPC分类号： B23K26/064 , B23K26/0624
摘要： An apparatus for influencing a laser beam from an ultrashort pulse laser includes a pulse-precise deflector unit configured to deflect the laser beam in at least one direction perpendicular to a beam propagation direction, a transformation optics arrangement having at least two components arranged downstream of the pulse-precise deflector unit. The transformation optics arrangement is configured to transform a spatial deflection and/or an angular deflection of the laser beam into the angular deflection and/or the spatial deflection, and/or transform the spatial deflection and the angular deflection inversely, by using a space-to-angle transformation and/or an angle-to-space transformation. The apparatus further includes a processing optical unit arranged downstream of the transformation optics arrangement and configured to guide the laser beam into an image-side focal plane of the processing optical unit.
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公开(公告)号：US20220390713A1
公开(公告)日：2022-12-08
申请号：US17886504
申请日：2022-08-12
申请人： TRUMPF Laser GmbH
摘要： An optical arrangement for a laser beam includes an f-theta lens. The f-theta lens is disposed in a divergent beam path of the optical arrangement in order to focus the laser beam into a focus plane. The focus plane is located at a distance from a focal plane of the f-theta lens.
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公开(公告)号：US20220360036A1
公开(公告)日：2022-11-10
申请号：US17863420
申请日：2022-07-13
申请人： TRUMPF Laser GmbH
发明人： Daniel Flamm , Andreas Heimes , Maike Prossotowicz
摘要： An apparatus for combining a plurality of coherent laser beams includes a splitting device configured to split an input laser beam into the plurality of coherent laser beams, a plurality of phase setting devices configured to adjust a respective phase of one of the plurality of coherent laser beams, and a beam combining device configured to combine the plurality of coherent laser beams, which emanate from a plurality of grid positions of a grid arrangement. The beam combining device includes a microlens arrangement having at least two microlens arrays. The apparatus further includes a controller configured to adjust a respective phase of a respective one of the plurality of coherent laser beams and/or vary a respective phase of a respective one of the plurality of coherent laser beams.
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公开(公告)号：US11444426B2
公开(公告)日：2022-09-13
申请号：US16244608
申请日：2019-01-10
申请人： TRUMPF LASER GMBH
发明人： Rainer Flaig , Oliver Rapp , Aleksander Budnicki , Florian Jansen , Daniel Glunk
摘要： In methods and devices for generating a laser pulse of an excitation laser that is actuated by a driver in response to a triggering time of a trigger signal, the driver actuation signal is generated taking into account the time interval between the triggering time and a preceding triggering time.
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公开(公告)号：US20220152737A1
公开(公告)日：2022-05-19
申请号：US17588355
申请日：2022-01-31
申请人： TRUMPF Laser GmbH
发明人： Elke Kaiser
IPC分类号： B23K26/244 , B23K26/323
摘要： A method for welding a copper/aluminum connection includes providing a first workpiece, which consists of a copper-containing material, in particular at least 80% by weight Cu, and a second workpiece, which consists of an aluminum-containing material, in particular at least 80% by weight Al, and welding the first workpiece and the second workpiece to one another in a surface region by means of a laser beam moved in relation to the first and second workpieces along a welding path. The laser beam is directed onto a surface of the first workpiece and the second workpiece is arranged behind the first workpiece with respect to the laser beam, with a greatest spot diameter SD of the laser beam on the surface of the first workpiece, where SD≤120 μm. The welding path is chosen such that the laser beam progressively penetrates into solid workpiece material along the welding path.
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公开(公告)号：US11271357B2
公开(公告)日：2022-03-08
申请号：US16257166
申请日：2019-01-25
申请人： TRUMPF LASER GMBH
摘要： Disclosed are optical arrangements including: a disk-shaped laser-active medium, a deflecting device, having a plurality of mirror elements on which mirror faces for deflecting a laser beam are formed, and having a base body on which the mirror elements are fastened, the mirror faces of the mirror elements being oriented in such a way that the laser beam is deflected by a respective mirror face via the disk-shaped laser-active medium to another mirror face. The mirror elements are formed in one piece or are monolithically joined, and have a connecting section that is formed rotationally symmetrically with respect to a center axis and is rigidly connected by a material-fit connection or a direct connection to the base body.
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公开(公告)号：US11247299B2
公开(公告)日：2022-02-15
申请号：US16000107
申请日：2018-06-05
申请人： TRUMPF LASER GMBH
发明人： Jochen Hutt , Rainer Flaig , Gerhard Broghammer , Michael Harteker , Marius Hezel , Matthias Fichter , Bernhard Kaiser
摘要： This disclosure relates to protective glass, for installation in laser tools of laser processing machines, comprising a transponder in which data relating to the protective glass are stored in a contactlessly readable fashion and/or can be contactlessly stored. A grip carrying the transponder is fastened as an installation aid directly on circumferential surface of the protective glass.
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公开(公告)号：US11223180B2
公开(公告)日：2022-01-11
申请号：US16257166
申请日：2019-01-25
申请人： TRUMPF LASER GMBH
摘要： Disclosed are optical arrangements including: a disk-shaped laser-active medium, a deflecting device, having a plurality of mirror elements on which mirror faces for deflecting a laser beam are formed, and having a base body on which the mirror elements are fastened, the mirror faces of the mirror elements being oriented in such a way that the laser beam is deflected by a respective mirror face via the disk-shaped laser-active medium to another mirror face. The mirror elements are formed in one piece or are monolithically joined, and have a connecting section that is formed rotationally symmetrically with respect to a center axis and is rigidly connected by a material-fit connection or a direct connection to the base body.
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