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公开(公告)号：US20220266386A1
公开(公告)日：2022-08-25
申请号：US17741461
申请日：2022-05-11
IPC分类号： B23K26/073 , B23K26/12 , B23K26/244 , B23K26/26 , B23K26/06 , H01M50/516
摘要： A method for joining busbars includes reshaping a raw laser beam to obtain a reshaped laser beam. The reshaped laser beam comprises a core focus portion and at least one ring focus portion. The core focus portion and the ring focus portion are coaxial with respect to one another. The ring focus portion surrounds the core focus portion. The method further includes directing the reshaped laser beam to a plurality of busbars to weld the plurality of busbars to one another along at least one weld seam.
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公开(公告)号：US20220234139A1
公开(公告)日：2022-07-28
申请号：US17719445
申请日：2022-04-13
IPC分类号： B23K26/21 , B23K26/082 , G02B6/26 , B23K26/073
摘要： A method for laser welding of a workpiece includes welding at a corner joint of two workpiece parts of the workpiece by a welding laser beam to create an aluminum connection between the two workpiece parts, and feeding an output laser beam into a first end of a multiclad fiber to generate the welding laser beam. The multiclad fiber comprises at least a core fiber and a ring fiber surrounding the core fiber. A first portion LK of a laser power output of the output laser beam is fed into the core fiber, and a second portion LR of the laser power output of the output laser beam is fed into the ring fiber. A second end of the multiclad fiber is reproduced on the workpiece. The method further includes welding the workpiece by deep welding.
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3.发明公开公开(公告)号：US20240024983A1
公开(公告)日：2024-01-25
申请号：US18482039
申请日：2023-10-06
IPC分类号： B23K26/26
CPC分类号： B23K26/26
摘要： A method for laser welding includes arranging two bar-type conductors next to one another with a partial overlap, and welding the two bar-type conductors to one another using a processing laser beam. A weld bead is formed on a common base surface of the bar-type conductors. During the welding, the processing laser beam is guided so that a welding contour is placed relative to the bar-type conductors. An advancing rate of the processing laser beam along the welding contour is selected such that the weld bead has a non-liquid oxide skin inside which liquid bar-type conductor material accumulates. The non-liquid oxide skin is partially broken open by the processing laser beam only on an upwardly facing end face of the weld bead, and remains undamaged in a surrounding region of the weld bead that extends downward from the upwardly facing end face and around the entire weld bead.
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公开(公告)号：US20220234140A1
公开(公告)日：2022-07-28
申请号：US17719461
申请日：2022-04-13
发明人： Oliver Bocksrocker
IPC分类号： B23K26/322 , B23K26/382 , B23K26/24 , B23K26/40
摘要： A method for processing a foil comprising lithium includes irradiating the foil with a laser beam having a wavelength of between 200 nm and 1 μm.
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公开(公告)号：US20210402518A1
公开(公告)日：2021-12-30
申请号：US17469905
申请日：2021-09-09
IPC分类号： B23K26/21 , B23K26/073 , B23K26/03 , B23K26/08
摘要： A hairpin welding method welds wire ends of at least two copper wires, arranged flush next to one another, to one another by a laser beam. The laser beam is generated with a beam cross section that impinges on the wire ends at an end side and has a round core region and a ring region surrounding the round core region. A ratio of an external diameter of the ring region to a diameter of the core region is between 7:1 and 2:1. A ratio of a laser power in the core region to a laser power in the ring region is between 10:90 and 70:30.
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公开(公告)号：US20240198450A1
公开(公告)日：2024-06-20
申请号：US18591028
申请日：2024-02-29
CPC分类号： B23K26/032 , B23K26/21 , B23K31/006 , B23K31/125
摘要： A method for identifying splatters or weld seam defects during laser processing of a workpiece includes processing the workpiece using a processing laser beam of a laser processing machine, compiling at least one recording of radiation emerging during the processing of the workpiece using an optical sensor that has a plurality of pixels for recording the radiation, and inputting the at least one recording into an evaluation unit. The evaluation unit has a machine learning algorithm configured as a convolutional neural network in a U-Net architecture. The machine learning algorithm has been trained with verified recordings of splatters or weld seam defects. The method further includes identifying one or more splatters or weld seam defects in the processing of the workpiece by running the machine learning algorithm using the at least one recording as input, and outputting an output indicating the identified one or more splatters or weld seam defects.
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公开(公告)号：US20220166296A1
公开(公告)日：2022-05-26
申请号：US17430831
申请日：2020-02-11
发明人： Tim Hesse , Oliver Bocksrocker
IPC分类号： H02K15/04 , H02K15/00 , B23K26/06 , B23K26/21 , B23K26/322 , B23K26/073
摘要： A method for joining copper hairpins includes providing at least two ends to be joined to one another of the copper hairpins, and joining the copper hairpins. The copper hairpins are joined by laser beam welding with a machining beam having a wavelength of less than 1000 nm.
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公开(公告)号：US12115595B2
公开(公告)日：2024-10-15
申请号：US17469905
申请日：2021-09-09
IPC分类号： B23K26/21 , B23K26/03 , B23K26/073 , B23K26/08 , B23K101/32 , B23K103/12
CPC分类号： B23K26/21 , B23K26/032 , B23K26/073 , B23K26/0876 , B23K2101/32 , B23K2103/12
摘要： A hairpin welding method welds wire ends of at least two copper wires, arranged flush next to one another, to one another by a laser beam. The laser beam is generated with a beam cross section that impinges on the wire ends at an end side and has a round core region and a ring region surrounding the round core region. A ratio of an external diameter of the ring region to a diameter of the core region is between 7:1 and 2:1. A ratio of a laser power in the core region to a laser power in the ring region is between 10:90 and 70:30.
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公开(公告)号：US12103106B2
公开(公告)日：2024-10-01
申请号：US17553867
申请日：2021-12-17
IPC分类号： B23K26/22 , B23K26/00 , B23K26/24 , B23K26/60 , B23K101/36
CPC分类号： B23K26/24 , B23K26/60 , B23K2101/36
摘要： A method for laser welding a multiplicity of foils onto a carrier includes arranging the foils one on top of the other to provide a foil stack, folding the foil stack to provide a folded region of the foil stack that protrudes up from two side regions of the foil stack, pressing the side regions against the carrier, and pressing together the side regions toward the folded region. The method further includes welding the foils to one another and to the carrier by directing a laser beam onto the folded region and moving the laser beam along the folded region.
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公开(公告)号：US20240082954A1
公开(公告)日：2024-03-14
申请号：US18517100
申请日：2023-11-22
发明人： Oliver Bocksrocker
IPC分类号： B23K26/244 , B23K26/073 , B23K26/082 , H01M8/021 , H01M8/0247 , H01S3/067 , H01S3/102
CPC分类号： B23K26/244 , B23K26/0734 , B23K26/082 , H01M8/021 , H01M8/0247 , H01S3/06791 , H01S3/102 , B23K2103/05
摘要： A method for laser welding of a bipolar plate for a fuel cell is provided. The bipolar plate includes two metallic plate parts. The method includes producing at least one continuously enclosing first weld seam with a first seam width, and producing at least one second weld seam with a second seam width. The second seam width is at least 10% greater than the first seam width.
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