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

IPC: B23K11/30 ,  B23K35/02 ,  B23B5/16 ,  B23K35/40

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.

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

IPC: B23K11/30 ,  B23K11/11

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.

公开(公告)号：US20210268597A1

公开(公告)日：2021-09-02

申请号：US17185510

申请日：2021-02-25

Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideaki MATSUOKA ,  Takanori NAKAGAKI ,  Kyosuke IZUNO ,  Koki NAKADA ,  Manabu OOGA

IPC: B23K11/18 ,  B23K11/11

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.