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公开(公告)号：US20210046585A1
公开(公告)日：2021-02-18
申请号：US17084698
申请日：2020-10-30
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Toru HIOKI , Shuhei OGURA , Hiroki TORIYAMA , Ryosuke KAWAI , Shun KATO
IPC: B23K26/242
Abstract: While a laser-beam application position is moved along a locus which circularly or elliptically circles around a locus center so as to cross a weld line that is a boundary between a first metal plate and a second metal plate overlapped with each other, the locus center is moved in a direction parallel to a weld line. A moving direction of the laser-beam application position is set such that the laser beam is first applied to the first metal plate and then to the second metal plate when the laser beam passes through an unmelted zone of the first metal plate and the second metal plate. The unmelted zone is located downstream of a range through which the laser beam has already passed in the direction parallel to the weld line.
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公开(公告)号：US20150336212A1
公开(公告)日：2015-11-26
申请号：US14715978
申请日：2015-05-19
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Kohei HISADA , Toru HIOKI , Junichiro MAKINO , Kazuyuki OGUSU , Masahiro NAKATA
CPC classification number: B23K26/22 , B23K26/082
Abstract: A laser welding method includes: projecting a laser beam onto irradiation regions on plural metallic workpieces such that a weld section is formed when the workpieces are joined by laser welding, the weld section being formed of plural nuggets, and each of the irradiation regions being formed with each of the nuggets. The nuggets are sequentially formed by sequentially projecting the laser beam onto the irradiation regions that respectively correspond to the nuggets. The laser beam is projected onto each of the irradiation regions such that an amount of input heat from the laser beam that is projected onto each of the irradiation regions to the workpiece is reduced as the nuggets are sequentially formed.
Abstract translation: 激光焊接方法包括：将激光束投射到多个金属工件上的照射区域上，使得当通过激光焊接接合工件时形成焊接部分，焊接部分由多个熔核形成，并且形成每个照射区域 与每个掘金。 通过将激光束顺序地投射到分别对应于掘金的照射区域上依次形成块体。 激光束投射到每个照射区域上，使得从依次形成块体的时候，将投射到每个照射区域上的激光束的投入热量减少到工件。
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公开(公告)号：US20190275606A1
公开(公告)日：2019-09-12
申请号：US16294086
申请日：2019-03-06
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Koji NOMURA , Shuhei OGURA , Atsushi KAWAKITA , Naoya KATO , Toru HIOKI , Kenji FUKUSHIMA , Shun KATO , Takashi GOTO
Abstract: Provided are a method and an apparatus for resistance spot welding in which preliminary current application is executed and then main welding is executed in accordance with master patterns of various parameters obtained during the preliminary current application. The main welding is executed under welding conditions of the master patterns, and whether a welding abnormality has occurred and whether the welding abnormality is likely to occur are determined. When the welding abnormality is likely to occur, the welding conditions for the main welding are corrected so as to prevent the welding abnormality. When the welding abnormality is unlikely to occur, the welding conditions for the main welding are corrected so as to match the master patterns.
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公开(公告)号：US20160288261A1
公开(公告)日：2016-10-06
申请号：US15059897
申请日：2016-03-03
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Kohei HISADA , Toru HIOKI , Shuichi MATSUMOTO , Kazuyuki OGUSU
CPC classification number: B23K26/22 , B23K15/008 , B23K15/0093 , B23K26/082 , B23K26/32 , B23K26/348 , B23K2101/18 , B23K2103/04 , B23K2103/10
Abstract: A welding method according to the present invention is a welding method for irradiating an object to be welded including a plurality of metallic plates that are stacked on each other with a high energy beam and performing welding. The welding method includes: forming a plurality of tack weld nuggets along a virtual closed curve on a part to be welded of the object to be welded; and forming a plurality of main weld nuggets so that the main weld nuggets overlap the plurality of respective tack weld nuggets.
Abstract translation: 根据本发明的焊接方法是一种焊接方法，用于对具有多个金属板的待焊接物体进行照射，所述多个金属板以高能量束彼此堆叠并进行焊接。 焊接方法包括：沿待被焊接物体的待焊接部件上的虚拟闭合曲线形成多个定位焊块; 并且形成多个主焊接块，使得主焊缝块与多个相应的定位焊块重叠。
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公开(公告)号：US20240391032A1
公开(公告)日：2024-11-28
申请号：US18663242
申请日：2024-05-14
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shota EJIMA , Tomoko OGASAHARA , Tomohiko SEKIGUCHI , Toru HIOKI , Nao KAWABE , Takaya OBARA
Abstract: A method of resistance spot welding comprises: preparing a machine learning model having learned a relation between a feature of a test data and a quality of a welding state of a test welding, the test data recording a time series change in an expansion amount of a workpiece in the test welding; and determining the quality of the welding state of a main welding using a main welding data and the machine learning model, the main welding data recording a time series change in an expansion amount of the workpiece in the main welding. The feature includes a first feature and a second feature, the first feature being with respect to a gradient of a change in an expansion amount of the workpiece during an expansion period in which the workpiece expands by energization, the second feature being with respect to a gradient of a change in an expansion amount of the workpiece during a contraction period in which the workpiece contracts after the expansion period.
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Patent Agency Ranking
公开(公告)号：US20200156179A1
公开(公告)日：2020-05-21
申请号：US16659615
申请日：2019-10-22
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Toru HIOKI , Manabu OOGA , Shun KATO
Abstract: A transfer processing unit of a processing tool for an electrode for resistance spot welding that is configured to mold, through transfer processing, a projection portion and a plurality of recess portions at an electrode tip portion bulging into a projecting shape is provided with a plurality of protrusions that are configured to mold the plurality of the recess portions respectively. A virtual plane that links tips of the plurality of these protrusions with one another assumes a shape coinciding with a surface shape of the electrode tip portion bulging into the projecting shape before transfer processing.
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公开(公告)号：US20190247948A1
公开(公告)日：2019-08-15
申请号：US16250012
申请日：2019-01-17
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Toru HIOKI , Shuhei Ogura , Atsushi Kawakita , Yoichi Tsutsumi , Takashi Goto
CPC classification number: B23K11/115 , B23K11/241
Abstract: A resistance spot welding method includes sandwiching metal plates put on top of one another between a pair of electrodes and performing resistance spot welding sequentially on a plurality of welding points close to each other on the metal plates by performing a current application between the electrodes so as to join the metal plates to each other. A welding current value to form a welding nugget at a welding point to be subjected to the resistance spot welding second or later among the welding points is set to be higher than a first welding current value to form a first welding nugget at a first welding point to be subjected to the resistance spot welding first among the welding points.
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公开(公告)号：US20250010407A1
公开(公告)日：2025-01-09
申请号：US18756841
申请日：2024-06-27
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Nao KAWABE , Tomohiko SEKIGUCHI , Toru HIOKI , Tomoko OGASAHARA , Shota EJIMA , Takaya OBARA
IPC: B23K31/12 , B23K11/11 , B23K101/18 , B23K103/04 , G01B7/16
Abstract: To provide an inspection method by which a poorly-welded workpiece can be discriminated with high accuracy even under the presence of disturbances. According to the present disclosure, an inspection method for spot welding in which an electrical current is applied to electrodes that sandwich steel plates includes: calculating a contraction amount of the steel plates at the electrodes from a welding force and an inter-electrode displacement amount after the end of application of the electrical current to the electrodes, and determining that the spot welding is poor when the contraction amount is equal to or below a discrimination threshold.
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公开(公告)号：US20200156178A1
公开(公告)日：2020-05-21
申请号：US16674064
申请日：2019-11-05
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Toru HIOKI , Manabu OOGA , Tomonori YANAGAWA , Shun KATO , Takashi GOTO , Hideaki MATSUOKA
Abstract: An electrode tip portion is provided with a projection portion and a plurality of recess portions. The plurality of the recess portions are independent of one another, and are provided at the electrode tip portion in a dispersed manner. The projection portion is a region other than regions where the recess portions are provided, and is configured to be equipped with a continuous surface that continues in regions among the plurality of the recess portions.
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公开(公告)号：US20180361507A1
公开(公告)日：2018-12-20
申请号：US16002437
申请日：2018-06-07
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Toru HIOKI , Shuhei OGURA , Hiroki TORIYAMA , Ryosuke KAWAI , Shun KATO
IPC: B23K26/242
Abstract: While a laser-beam application position is moved along a locus which circularly or elliptically circles around a locus center so as to cross a weld line that is a boundary between a first metal plate and a second metal plate overlapped with each other, the locus center is moved in a direction parallel to a weld line. A moving direction of the laser-beam application position is set such that the laser beam is first applied to the first metal plate and then to the second metal plate when the laser beam passes through an unmelted zone of the first metal plate and the second metal plate. The unmelted zone is located downstream of a range through which the laser beam has already passed in the direction parallel to the weld line.
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