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公开(公告)号：US20230311233A1
公开(公告)日：2023-10-05
申请号：US18166225
申请日：2023-02-08
Inventor： Hideaki MATSUOKA , Gaku Kitahara , Tatsuyuki Amago , Hiroyuki Mori , Jun Yaokawa , Kyosuke Izuno , Shuhei Ogura , Tomohiko Sekiguchi , Ayaka Kagami
CPC classification number: B23K11/115 , B23K11/24 , B23K11/3009
Abstract: A spot welding method including: a main energization step of energizing a pair of opposing electrodes in pressure contact with both outer surfaces of a set of sheets where multiple sheet materials are stacked, thereby to cause melting between facing surfaces of the sheet materials; and a pressing variation step of, prior to the main energization step, causing a pulsation of pressing force applied to the set of sheets from the electrodes. A resin material such as an adhesive or a sealant may be interposed between the facing surfaces of at least a pair of the sheet materials. The period of the pulsation is 0.01 to 0.7 seconds. The amplitude of the pulsation is 10% to 90% with respect to a reference value of the pressing force. The set of sheets may include a first and a second steel sheet, and an aluminum alloy sheet that are stacked in order.
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Patent Agency Ranking
公开(公告)号：US20210268597A1
公开(公告)日：2021-09-02
申请号：US17185510
申请日：2021-02-25
Inventor： Hideaki MATSUOKA , Takanori NAKAGAKI , Kyosuke IZUNO , Koki NAKADA , Manabu OOGA
Abstract: A spot welding method includes a heating step of energizing an electrode in pressure contact with an Al alloy member to heat and melt a join part by resistance heating and a cooling step of cooling the join part after the heating step in a state in which the electrode is in pressure contact with the Al alloy member. The alloy is a wrought alloy of Mg: 0.2 to 1.2 mass %, Si: 0.4 to 1.5%, and Cu: 1.1% or less or a casting alloy of Si: 7 to 11% and Mg: 0.1 to 0.4% with respect to 100% as a whole. The cooling step includes a first cooling process performed with a reduced amount of input energy to the join part as compared with the heating step and a second cooling process performed after the first cooling process at a higher cooling rate than that in the first cooling process.
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公开(公告)号：US20230296125A1
公开(公告)日：2023-09-21
申请号：US18164159
申请日：2023-02-03
Inventor： Hideaki MATSUOKA , Gaku KITAHARA , Tatsuyuki AMAGO , Hiroyuki MORI , Jun YAOKAWA , Kyosuke IZUNO , Kohei TAKAHASHI , Tomohiko SEKIGUCHI , Ayaka KAGAMI
CPC classification number: F16B37/061 , B23K11/14
Abstract: A method of manufacturing a member for fastening by joining a nut with a tubular joint portion extending from a main body formed with an internal thread to a panel with a mounting hole for the nut on an aluminum base material. The joint portion has a rotation-preventing portion with a concave and convex shaped outer peripheral surface and a guide portion extending from the rotation-preventing portion to one side. After the guide portion is inserted into the mounting hole, the nut is energized by electrodes in contact with both nut end surface sides. The nut then generates heat, and the periphery of the mounting hole is heated and softened. When the nut is pressurized with the electrodes, the rotation-preventing portion bites into the mounting hole, and the one end portion of the guide portion is swaged to become a retaining portion on one surface side of the panel.
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公开(公告)号：US20220111464A1
公开(公告)日：2022-04-14
申请号：US17373123
申请日：2021-07-12
Inventor： Hideaki MATSUOKA , Takashi ASADA , Tatsuyuki AMAGO , Kyosuke IZUNO , Koki NAKADA , Tomohiko SEKIGUCHI , Shuhei OGURA
Abstract: A novel spot welding method for steel sheets and an aluminum alloy sheet, includes stacked sheet materials from a pair of opposing electrodes to join the sheet materials by resistance heating. The pair of opposing electrodes are in pressure contact with both outer surfaces of the sheet sets. The sheet sets include at least a first and second steel sheet, and an aluminum alloy sheet stacked in this order. A first energization step forms a molten pool between facing surfaces of the first and second steel sheets without melting the aluminum alloy sheet. A second energization step causes a melting reaction between facing surfaces of the second steel sheet and the aluminum alloy sheet. The first and second steel sheets are joined via a first nugget. The second steel sheet and the aluminum alloy sheet are joined via a second nugget including an intermetallic compound generated by the melting reaction.
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公开(公告)号：US20230139132A1
公开(公告)日：2023-05-04
申请号：US17884797
申请日：2022-08-10
Inventor： Hideaki MATSUOKA , Hiroaki KADOURA , Takashi ASADA , Hiroyuki MORI , Tatsuyuki AMAGO , Ayaka KAGAMI , Shuhei OGURA , Tomohiko SEKIGUCHI , Kyosuke IZUNO
Abstract: A metal joined body has an iron base body and an aluminum base body that are joined together via a joint layer. The joint layer has a first layer composed of a first intermetallic compound formed on the iron base body side and a second layer composed of a second intermetallic compound formed on the aluminum base body side. The first layer has one or more first protrusions that merge integrally into the iron base body and extend in a pile shape into the first intermetallic compound. The second layer may have one or more second protrusions that are composed of a second intermetallic compound and extend in a columnar shape into the aluminum base body. The first intermetallic compound may contain Al5Fe2, and the second intermetallic compound may contain Al3Fe. The total thickness of the first layer and the second layer is, for example, 2 to 15 μm.
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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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