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公开(公告)号：US20220388098A1
公开(公告)日：2022-12-08
申请号：US17664065
申请日：2022-05-19
Inventor： KOJI FUNAMI , KAZUKI FUJIWARA , IZURU NAKAI
Abstract: A laser processing method for scanning over a first member in a first direction while irradiating the first member with a laser beam emitted from an oscillator, and joining the first member and a second member adjacent to the first member by a molten portion, the laser processing method including the steps of: in each of a first measurement region and a second measurement region different from the first measurement region, measuring an intensity of a welding light including any one of a heat radiation light radiated from at least one of the first member and the second member by irradiation with the laser beam, a plasma light, and a reflected light; and evaluating a processing state based on the intensity of the welding light measured in each of the first measurement region and the second measurement region, in which the first measurement region and the second measurement region are aligned in a second direction intersecting the first direction.
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公开(公告)号：US20210107096A1
公开(公告)日：2021-04-15
申请号：US17031984
申请日：2020-09-25
Inventor： KOJI FUNAMI
Abstract: A laser welding quality inspection method of a welded portion between a joining object and a joined object, when the joining object and the joined object are welded by being irradiated with a laser beam, the method includes: acquiring first data indicating a signal intensity of thermal radiation light radiated from the welded portion during the welding; acquiring second data indicating a signal intensity of plasma light radiated from the welded portion during the welding; and determining whether or not the welded portion includes an abnormality based on a comparison between the signal intensity of the thermal radiation light and the signal intensity of the plasma light which are acquired.
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公开(公告)号：US20200176750A1
公开(公告)日：2020-06-04
申请号：US16656121
申请日：2019-10-17
Inventor： KOJI FUNAMI , IZURU NAKAI , KAZUMICHI SHIMIZU , HIROSHI TAKASAKI
Abstract: A cylindrical battery having improved strength against rotational torque includes: an electrode unit configured as a roll of a first electrode plate and a second electrode plate with a separator in between, the first electrode plate being an electrode plate to which one end of a first electrode tab and one end of a second electrode tab are connected, the second electrode plate having opposite polarity from the first electrode plate; a case housing the electrode unit; and a sealing member sealing an opening rim of the case. The first electrode tab and the second electrode tab are disposed to project out from the first electrode plate at opposite ends of a winding axis of the first electrode late. The first electrode tab is in contact with a bottom portion of the case by being welded thereto. The second electrode tab is welded at the opening rim side opposite the bottom portion of the case.
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公开(公告)号：US20180281111A1
公开(公告)日：2018-10-04
申请号：US15910060
申请日：2018-03-02
Inventor： TAKAAKI KASSAI , KOJI FUNAMI
IPC: B23K26/26 , H01M2/02 , B23K26/082 , B23K26/354 , B23K26/0622
Abstract: When a linear welding trace is formed by welding a battery case and an electrode tab, an output of the laser increases to a first output during a first period after laser irradiation start to melt the battery case until the electrode tab is melted with the first output, the first output is maintained during a second period to melt the electrode tab and the battery case, the output of the laser decreases from the first output to a second output for melting only the battery case, and the second output is maintained until formation of the welding trace is completed or the laser output is decreased from the second output by an amount that is less than the decrease amount when the laser output decreased from the first output to the second output.
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公开(公告)号：US20250083251A1
公开(公告)日：2025-03-13
申请号：US18961344
申请日：2024-11-26
Inventor： KOJI FUNAMI , KAZUKI FUJIWARA , IZURU NAKAI , TATSURO SHIRAISHI
IPC: B23K26/064 , B23K26/36
Abstract: A laser machining device according to one aspect of the present disclosure includes: a welding device that irradiates a workpiece with laser irradiation light to perform welding; and a welding light measurement device including an imaging optical system, a first photodetector, and a second photodetector, the welding light measurement device receiving and measuring welding light emitted from the workpiece during laser welding. The welding light includes first light in a first wavelength region and second light in a second wavelength region, and the imaging optical system includes a wavelength selection mask, and forms an image of a light beam of the first light transmitted through the wavelength selection mask on the first photodetector and forms an image of a light beam of the second light transmitted through the wavelength selection mask on the second photodetector. The wavelength selection mask includes a first region and a second region that receive the welding light, the first region reflects the second light and transmits the first light, the second region transmits the first light and the second light, and the second region has a smaller light receiving area than the first region. The first photodetector and the second photodetector are disposed on an optical axis of the welding light incident on the wavelength selection mask.
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Patent Agency Ranking
公开(公告)号：US20210394305A1
公开(公告)日：2021-12-23
申请号：US17331972
申请日：2021-05-27
Inventor： KOJI FUNAMI , KAZUKI FUJIWARA , KOTA SHIMIZU , KAZUMICHI SHIMIZU
IPC: B23K26/082 , B23K26/28 , B23K26/06 , B23K26/70 , B23K31/12
Abstract: The present disclosure includes a laser welding method in which a joint surface between a plurality of workpiece members is welded by radiating laser beam LB, and a locus of laser beam LB is controlled so as to perform wobbling scanning Sw by a combination of scanning motion Sa moving along first direction x parallel to the joint surface and swing motion Sb including first swing component Bx along first direction x and second swing component By along second direction y perpendicular to first direction x, the method including a defect determination step of determining occurrence of a welding defect; and an output control step of increasing or decreasing an output of laser beam LB when laser beam LB is radiated again toward the welding defect in a case where the welding defect occurs.
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公开(公告)号：US20160114429A1
公开(公告)日：2016-04-28
申请号：US14888446
申请日：2015-04-07
Inventor： DAISUKE SHIOGA , TOMOMI TANAKA , KOJI FUNAMI
IPC: B23K26/323 , B23K26/00
CPC classification number: B23K26/323 , B23K26/0006 , B23K26/244 , B23K2103/10 , B23K2103/12 , B23K2103/18 , H01M2/206 , H01M2220/20
Abstract: A dissimilar metal joined body includes a copper material, an aluminum material and a molten mixed portion. The molten mixed portion is configured so that part of the aluminum material is melted and flows into the copper material. The depth from a surface of the copper material which contacts the aluminum material in the molten mixed portion is at least 5 μm and no greater than 30 μm.
Abstract translation: 异种金属接合体包括铜材料，铝材料和熔融混合部分。 熔融混合部分构造成使得铝材料的一部分熔化并流入铜材料。 从熔融混合部中与铝材接触的铜材的表面的深度为5μm以上30μm以下。
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公开(公告)号：US20220161356A1
公开(公告)日：2022-05-26
申请号：US17512637
申请日：2021-10-27
Inventor： KAZUKI FUJIWARA , KOJI FUNAMI
Abstract: A laser processing system includes a laser oscillator that forms a fusion zone in a workpiece by irradiating a fusion-scheduled region of a processing target surface of the workpiece with a laser beam, a photometer that measures intensity of light from the fusion zone of the workpiece, and a jig disposed on the processing target surface of the workpiece not to overlap the fusion-scheduled region in order to press the workpiece. The jig has a reflection surface inclined in a manner that the reflection surface is further away from the fusion-scheduled region as the reflection surface is further away from the processing target surface in a normal direction of the processing target surface of the workpiece.
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公开(公告)号：US20220143745A1
公开(公告)日：2022-05-12
申请号：US17494183
申请日：2021-10-05
Inventor： KOJI FUNAMI , KAZUKI FUJIWARA , IZURU NAKAI
IPC: B23K26/046 , B23K26/08 , B23K26/70 , B23K26/38
Abstract: An evaluation method for evaluating laser machining in which irradiation region of a laser beam is moved relative to object to perform machining of object, includes a measurement step and an evaluation step. In the measurement step, a change in an intensity of light according to a movement of measurement region is measured by moving measurement region for measuring the intensity of light, relative to object. In the evaluation step, an evaluation of the laser machining is performed based on the change in the intensity of light according to the movement of measurement region. In the measurement step, measurement region is moved relative to object so that movement path of measurement region has a plurality of intersections with movement path of irradiation region.
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公开(公告)号：US20210370438A1
公开(公告)日：2021-12-02
申请号：US17314083
申请日：2021-05-07
Inventor： KAZUKI FUJIWARA , KOJI FUNAMI
IPC: B23K26/06 , B23K26/0622 , B23K26/035 , B23K26/04
Abstract: A laser processing device which irradiates a workpiece while scanning focused laser light and forms molten region on a surface of workpiece includes first optical sensor which has a function of detecting light generated from molten region during irradiation with the laser light, the detecting is performed for first measurement region on the surface of workpiece as a detection target, and second optical sensor which has a function of detecting light generated from molten region during irradiation with the laser light, the detecting is performed for second measurement region narrower than first measurement region on the surface of workpiece as a detection target.
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