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公开(公告)号：US20210394305A1
公开(公告)日：2021-12-23
申请号：US17331972
申请日：2021-05-27
发明人： KOJI FUNAMI , KAZUKI FUJIWARA , KOTA SHIMIZU , KAZUMICHI SHIMIZU
IPC分类号： B23K26/082 , B23K26/28 , B23K26/06 , B23K26/70 , B23K31/12
摘要： 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：US20220388098A1
公开(公告)日：2022-12-08
申请号：US17664065
申请日：2022-05-19
发明人： KOJI FUNAMI , KAZUKI FUJIWARA , IZURU NAKAI
摘要： 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：US20200269357A1
公开(公告)日：2020-08-27
申请号：US16776929
申请日：2020-01-30
IPC分类号： B23K26/53 , B23K26/082 , B23K26/03
摘要： To reduce a width of a modified layer and suppress positional variation of the modified layer, a crystal orientation of a workpiece is measured, a vertical direction with respect to an A-plane of the measured crystal orientation of the workpiece is specified, and a polarization direction of laser light is adjusted so that scanning of laser light is performed along the specified vertical direction with respect to the A-plane of the crystal orientation of the workpiece.
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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
发明人： KAZUKI FUJIWARA , KOJI FUNAMI
摘要： 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
发明人： KOJI FUNAMI , KAZUKI FUJIWARA , IZURU NAKAI
IPC分类号： B23K26/046 , B23K26/08 , B23K26/70 , B23K26/38
摘要： 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
发明人： KAZUKI FUJIWARA , KOJI FUNAMI
IPC分类号： B23K26/06 , B23K26/0622 , B23K26/035 , B23K26/04
摘要： 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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