-
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.
-
公开(公告)号：US11229973B2
公开(公告)日：2022-01-25
申请号：US16133923
申请日：2018-09-18
发明人： Patrick Haug , Tim Hesse , Steffen Kessler , Marcel Schäfer , Philipp Scheible
摘要： Methods for determining the quality of a weld of a workpiece welded by laser-beam welding, wherein at least a partial region of a molten pool and/or of a surrounding area of the molten pool is observed by means of a measuring system during the laser-beam welding and the quality of the weld of the welded workpiece is determined on the basis of the observation result. At least one characteristic value that correlates with molten pool oscillation of the molten pool is observed during the laser-beam welding and a measure of an amplitude of the molten pool oscillation and/or a measure of a frequency of the molten pool oscillation is determined from the observed time curve of the characteristic value. A probability and/or a frequency for the occurrence of hot cracks at the weld of the workpiece is inferred.
-
公开(公告)号：US11045901B2
公开(公告)日：2021-06-29
申请号：US16133917
申请日：2018-09-18
发明人： Nicolai Speker , Marcel Schäfer , Philipp Scheible , Thomas Graf , Peter Stritt
摘要： A laser beam directed is moved relative to a workpiece to weld along a weld seam and form a weld pool in the area surrounding the laser beam. The weld pool has a characteristic oscillation frequency fco, and a laser power is modulated with a modulation frequency f and a modulation amplitude Π=1−Pmin/Pmax, where Pmin is minimal and Pmax is maximal laser power during a modulation period. For a normalized characteristic oscillation frequency Λco and a normalized modulation frequency Λ, Λ≥2.2*Λco, with Λ=f·df/ν, where ν is the feed rate of the laser beam, and df is diameter of a beam focal spot. Also, Λco=f,cotest·df,cotest/vcotest, where fcotest is a measured characteristic oscillation frequency, df,cotest the diameter of the beam focal spot, and vcotest is the feed rate of laser beam, all during a test measurement without modulation of the laser power.
-
公开(公告)号：US20190039176A1
公开(公告)日：2019-02-07
申请号：US16133917
申请日：2018-09-18
发明人： Nicolai Speker , Marcel Schäfer , Philipp Scheible , Thomas Graf , Peter Stritt
摘要： A laser beam directed is moved relative to a workpiece to weld along a weld seam and form a weld pool in the area surrounding the laser beam. The weld pool has a characteristic oscillation frequency fco, and a laser power is modulated with a modulation frequency f and a modulation amplitude Π=1−Pmin/Pmax, where Pmin is minimal and Pmax is maximal laser power during a modulation period. For a normalized characteristic oscillation frequency Λco and a normalized modulation frequency Λ, Λ≥2.2*Λco, with Λ=f·df/ν, where ν is the feed rate of the laser beam, and df is diameter of a beam focal spot. Also, Λco=f,cotest·df,cotest/vcotest, where fcotest is a measured characteristic oscillation frequency, df,cotest the diameter of the beam focal spot, and vcotest is the feed rate of laser beam, all during a test measurement without modulation of the laser power.
-
公开(公告)号：US20240173797A1
公开(公告)日：2024-05-30
申请号：US18393748
申请日：2023-12-22
发明人： Philipp Scheible , Patrick Haug
IPC分类号： B23K26/067 , B23K26/03 , B23K26/24 , B23K31/12 , B23K103/10
CPC分类号： B23K26/0676 , B23K26/032 , B23K26/24 , B23K31/125 , B23K2103/10
摘要： A method for welding at least two aluminum-containing components includes subdividing an output laser beam into multiple partial beams directed onto the at least two components, so that multiple laser spots are generated on a surface of the at least two components, and traversing a welding contour with the multiple laser spots on the surface of the components. Centers of at least three laser spots of the multiple laser spots are arranged in a ring formation. The output laser beam is generated by a multifiber, so that each laser spot of the multiple laser spots on the surface of the components has a core portion and a ring portion. The welding contour is traversed at least partially a second time after the welding contour has been traversed a first time.
-
公开(公告)号：US20240123544A1
公开(公告)日：2024-04-18
申请号：US18393755
申请日：2023-12-22
发明人： Philipp Scheible , Patrick Haug , Jan Wildermuth
IPC分类号： B23K26/067 , B23K26/06 , B23K26/064 , B23K26/073 , B23K26/244 , B23K26/26
CPC分类号： B23K26/0676 , B23K26/0626 , B23K26/064 , B23K26/0734 , B23K26/244 , B23K26/26 , B23K2103/10
摘要： A method for welding at least two aluminum-containing components is provided. The components have an aluminum content of at least 75% by weight. The method includes subdividing an output laser beam into multiple partial beams directed onto the components, so that multiple laser spots are generated on a surface of the components, and traversing a welding contour on the surface of the components with the multiple laser spots. Laser spot centers of at least three laser spots of the multiple laser spots are arranged in a ring formation. The output laser beam is generated by a multifiber, so that each laser spot of the multiple laser spots on the surface of the components has a core portion and a ring portion, with a mean power density in the core portion being higher than a mean power density in the ring portion.
-
公开(公告)号：US20190022793A1
公开(公告)日：2019-01-24
申请号：US16133923
申请日：2018-09-18
发明人： Patrick Haug , Tim Hesse , Steffen Kessler , Marcel Schäfer , Philipp Scheible
摘要： Methods for determining the quality of a weld of a workpiece welded by laser-beam welding, wherein at least a partial region of a molten pool and/or of a surrounding area of the molten pool is observed by means of a measuring system during the laser-beam welding and the quality of the weld of the welded workpiece is determined on the basis of the observation result. At least one characteristic value that correlates with molten pool oscillation of the molten pool is observed during the laser-beam welding and a measure of an amplitude of the molten pool oscillation and/or a measure of a frequency of the molten pool oscillation is determined from the observed time curve of the characteristic value. A probability and/or a frequency for the occurrence of hot cracks at the weld of the workpiece is inferred.
-
-
-
-
-
-
搜索结果
7 条记录 (耗时 0.018 秒)
