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    Method and system for joining workpieces
    1.
    发明授权
    Method and system for joining workpieces 有权

    公开(公告)号：US12290871B2

    公开(公告)日：2025-05-06

    申请号：US17987913

    申请日：2022-11-16

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Steven Cipriano ,  Pei-chung Wang ,  Zhenke Teng ,  Anthony V. Minatel

    IPC: B23K11/20 ,  B23K11/11 ,  B23K35/36 ,  B23K37/00 ,  B23K103/04 ,  B23K103/10

    Abstract: Methods and systems for joining multiple workpieces are provided. In one example, the method includes dispensing adhesive on a first workpiece. A second workpiece is contacted with the adhesive such that the adhesive is disposed between the first and second workpieces. Resistance heating is produced in the first and second workpieces at first processing conditions to partially cure the adhesive and affix the first and second workpieces together to form a partially cured, adhesive-joined workpiece assembly. The partially cured, adhesive-joined workpiece assembly is exposed to heat at second processing conditions to substantially fully cure the adhesive.

    Resistance spot brazing workpiece stack-ups having one or more thin-gauge steel workpieces
    5.
    发明授权
    Resistance spot brazing workpiece stack-ups having one or more thin-gauge steel workpieces 有权

    公开(公告)号：US11318548B2

    公开(公告)日：2022-05-03

    申请号：US15952645

    申请日：2018-04-13

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Pei-chung Wang ,  Michael J. Karagoulis ,  Zhenke Teng

    IPC: B23K1/00 ,  B23K11/31 ,  B23K11/11

    Abstract: A method of resistance spot brazing a workpiece stack-up that includes a first thin-gauge steel workpiece and a second thin-gauge steel workpiece. The method includes several steps. A first step involves applying a filler material to a surface of the first thin-gauge steel workpiece. A second step involves bringing a surface of the second thin-gauge steel workpiece to adjoin the filler material. A third step involves clamping a first welding electrode and a second welding electrode on the first and second thin-gauge steel workpieces and over the filler material. A fourth step involves passing electrical current between the first and second welding electrodes and hence through the filler material. And a fifth step involves terminating passage of the electrical current in order to establish a brazed joint between the first and second thin-gauge steel workpieces.

    Ultrasonic welding and welding horn having indenter
    6.
    发明授权
    Ultrasonic welding and welding horn having indenter 有权

    公开(公告)号：US11141925B2

    公开(公告)日：2021-10-12

    申请号：US16669802

    申请日：2019-10-31

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Pei-chung Wang ,  Bradley J. Blaski ,  Athreya Nagesh

    IPC: B29C65/08 ,  B29C65/00

    Abstract: A method of joining includes disposing a second workpiece adjacent to a first workpiece. The method further includes identifying a determined hardness parameter of at least one of the first and second workpieces at a welding position. The determined hardness parameter is determined by at least one of estimation, calculation, and measurement. The method includes selecting a weld schedule based on the determined hardness parameter and welding the first and second workpieces together using the selected weld schedule. A welding horn includes a shank and a tip having an end face, the tip being disposed at an end of the shank and configured to contact a workpiece and to transmit energy to the workpiece. Knurls are disposed on the end face, each knurl having a distal end. A curved indenter extends from the end face beyond the distal ends of the knurls.

    Resistance Spot Welding Workpiece Stack-Ups Having Steel Workpieces With Surface Coatings
    7.
    发明申请
    Resistance Spot Welding Workpiece Stack-Ups Having Steel Workpieces With Surface Coatings 审中-公开

    公开(公告)号：US20190314915A1

    公开(公告)日：2019-10-17

    申请号：US15952813

    申请日：2018-04-13

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Pei-chung Wang ,  Michael J. Karagoulis ,  Zhenke Teng ,  Spyros P. Mellas

    IPC: B23K1/00 ,  B23K11/11 ,  B23K11/16 ,  B23K11/31

    Abstract: A method of resistance spot welding a workpiece stack-up that includes a first steel workpiece and a second steel workpiece. The method includes several steps. The first steel workpiece can have a first surface coating. One step involves applying a filler metal to a surface of the first steel workpiece. Another step involves bringing a surface of the second steel workpiece to adjoin the filler metal. Yet another step involves clamping a first welding electrode and a second welding electrode on the first and second steel workpieces. And another step involves passing electrical current between the first and second welding electrodes and hence through the filler metal. And yet another step involves terminating passage of the electrical current in order to establish a weld joint between the first and second steel workpieces.

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