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    Fabricated-in-place inserts to receive self-piercing rivets
    22.
    发明授权
    Fabricated-in-place inserts to receive self-piercing rivets 有权
    现场制造的插入件可以接受自穿刺铆钉

    公开(公告)号：US09556892B2

    公开(公告)日：2017-01-31

    申请号：US14189001

    申请日：2014-02-25

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Blair E. Carlson ,  Pei-Chung Wang

    IPC: F16B19/08 ,  B21J15/02 ,  B22D19/04 ,  B29C70/76 ,  F16B5/04 ,  B29C65/56 ,  B29C65/00

    CPC classification number: F16B19/086 ,  B21J15/025 ,  B22D19/04 ,  B29C65/562 ,  B29C65/8253 ,  B29C66/721 ,  B29C70/76 ,  B29L2031/30 ,  F16B5/04 ,  Y10T29/49835 ,  Y10T29/49956 ,  Y10T428/12271 ,  Y10T428/22

    Abstract: One or more ductile metal inserts may be selectively incorporated into articles of limited ductility, including metal castings and molded polymers. The inserts are positioned at joint locations for joining of the article to other articles using self-piercing riveting (SPR). The inserts are of suitable ductility, thickness and strength to receive and retain self-piercing rivets and enable a strong riveted joint between the article and a second article. In an embodiment the articles are magnesium alloy castings formed by any of sand casting, die casting and semi-solid metal casting. The chemical composition of the insert may be informed by the anticipated corrosive environment of the joint and the casting temperature of the magnesium alloy. For magnesium alloy castings which may be exposed to corrosive environments, aluminum alloy inserts are preferred.

    Abstract translation: 一个或多个延性金属插入物可以选择性地掺入有限延展性的制品中，包括金属铸件和模塑聚合物。 插入件定位在接合位置，用于使用自穿孔铆接（SPR）将制品与其他制品接合。 插入件具有合适的延展性，厚度和强度以接收和保持自穿孔铆钉，并且能够在物品和第二制品之间形成牢固的铆接接头。 在一个实施例中，制品是通过砂铸，压铸和半固体金属铸造中的任何一种形成的镁合金铸件。 插入物的化学成分可以通过接头的预期腐蚀环境和镁合金的铸造温度通知。 对于可能暴露于腐蚀性环境的镁合金铸件，优选铝合金刀片。

    RESISTANCE WELDING WITH MINIMIZED WELD EXPULSION
    23.
    发明申请
    RESISTANCE WELDING WITH MINIMIZED WELD EXPULSION 有权
    具有最小化焊接扩展的电阻焊接

    公开(公告)号：US20150034609A1

    公开(公告)日：2015-02-05

    申请号：US13954481

    申请日：2013-07-30

    Applicant: SHANGHAI JIAO TONG UNIVERSITY ,  GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Yansong Zhang ,  Guanlong Chen ,  Pei-Chung Wang ,  Yang-Yang Zhao ,  Xinmin Lai

    IPC: B23K11/11 ,  B23K11/16

    CPC classification number: B23K11/115 ,  B23K11/16 ,  B23K11/256 ,  G05B2219/45135

    Abstract: A system for forming a weld nugget in a metal work piece includes a power supply, actuator, electrodes, and controller. The actuator delivers a variable electrode force to the work piece in response to a force command. The controller executes a method by transmitting a welding current command to the power supply to cause the power supply to output a welding current to the electrodes. The controller transmits the force command to the actuator to apply the variable electrode force, via the electrodes, to the work piece at a first force level. The variable electrode force increases from a second force level immediately upon conclusion of a first duration to minimize weld expulsion. The second force level commences at a point in time in the dynamic resistance profile at which a dynamic resistance value of the work piece decreases at a threshold rate during formation of the weld nugget.

    Abstract translation: 用于在金属工件中形成焊点的系统包括电源，致动器，电极和控制器。 致动器响应于力命令向工件传递可变电极力。 控制器通过向电源发送焊接电流命令来执行方法，以使电源向电极输出焊接电流。 控制器向致动器传递力指令，以通过电极将可变电极力以第一力水平施加到工件。 可变电极力在第一持续时间结束时立即从第二力水平增加以最小化焊接排出。 第二力级在动态电阻分布的时间点开始，在动态电阻分布中，在焊接熔核形成期间工件的动态电阻值以阈值速率降低。

    BLIND FLOW SCREW JOINING OF MATERIALS
    25.
    发明申请
    BLIND FLOW SCREW JOINING OF MATERIALS 审中-公开

    公开(公告)号：US20180214934A1

    公开(公告)日：2018-08-02

    申请号：US15488233

    申请日：2017-04-14

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Pei-Chung Wang ,  Steven Cipriano ,  Bradley J. Blaski ,  Richard C. Janis

    IPC: B21J15/02 ,  F16B13/02 ,  F16B25/00 ,  F16B19/10 ,  B21J15/04

    Abstract: A two-part mechanical fastener comprising an elongated body with a bore slidably carrying a mandrel adapted to interferingly engage the body is described. The fastener body has one or more protuberances on its exterior surface. In an aspect, the protuberances form a thread. The fastener is adapted to form an opening in, and penetrate, a stack of two or more workpieces. To secure the workpieces in the workpiece stack and form a robust joint, the fastener body is deformed by the mandrel, expanding the body, so that a body end engages a surface of the workpiece stack and the one or more protuberances are brought into engagement with the walls of the opening. Methods of using such a fastener to secure non-ferrous or polymer-based sheet-like workpieces to one another are disclosed.

    Resistance welding with minimized weld expulsion
    28.
    发明授权
    Resistance welding with minimized weld expulsion 有权
    电阻焊接，最小化焊接排出

    公开(公告)号：US09579744B2

    公开(公告)日：2017-02-28

    申请号：US13954481

    申请日：2013-07-30

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  SHANGHAI JIAO TONG UNIVERSITY

    Inventor： Yansong Zhang ,  Guanlong Chen ,  Pei-Chung Wang ,  Yang-Yang Zhao ,  Xinmin Lai

    IPC: B23K11/11 ,  B23K11/24 ,  B23K11/16 ,  B23K11/25

    CPC classification number: B23K11/115 ,  B23K11/16 ,  B23K11/256 ,  G05B2219/45135

    Abstract: A system for forming a weld nugget in a metal work piece includes a power supply, actuator, electrodes, and controller. The actuator delivers a variable electrode force to the work piece in response to a force command. The controller executes a method by transmitting a welding current command to the power supply to cause the power supply to output a welding current to the electrodes. The controller transmits the force command to the actuator to apply the variable electrode force, via the electrodes, to the work piece at a first force level. The variable electrode force increases from a second force level immediately upon conclusion of a first duration to minimize weld expulsion. The second force level commences at a point in time in the dynamic resistance profile at which a dynamic resistance value of the work piece decreases at a threshold rate during formation of the weld nugget.

    Abstract translation: 用于在金属工件中形成焊点的系统包括电源，致动器，电极和控制器。 致动器响应于力命令向工件传递可变电极力。 控制器通过向电源发送焊接电流命令来执行方法，以使电源向电极输出焊接电流。 控制器向致动器传递力指令，以通过电极将可变电极力以第一力水平施加到工件。 可变电极力在第一持续时间结束时立即从第二力水平增加以最小化焊接排出。 第二力级在动态电阻分布的时间点开始，在动态电阻分布中，在焊接熔核形成期间工件的动态电阻值以阈值速率降低。

    RESISTANCE SPOT WELDING STEEL AND ALUMINUM WORKPIECES WITH ELECTRODE INSERT
    29.
    发明申请
    RESISTANCE SPOT WELDING STEEL AND ALUMINUM WORKPIECES WITH ELECTRODE INSERT 有权
    电阻焊接钢和铝电极与电极插件

    公开(公告)号：US20160158874A1

    公开(公告)日：2016-06-09

    申请号：US14561746

    申请日：2014-12-05

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Pei-Chung Wang ,  David R. Sigler ,  Blair E. Carlson

    IPC: B23K11/20 ,  B23K11/30 ,  B23K11/11

    CPC classification number: B23K11/20 ,  B23K11/115 ,  B23K11/3009 ,  B23K2103/20

    Abstract: A method of resistance spot welding a steel workpiece and an aluminum or aluminum alloy workpiece together includes several steps. In one step a workpiece stack-up is provided. The workpiece stack-up includes a steel workpiece and an aluminum or aluminum alloy workpiece. Another step involves providing a first welding electrode that confronts the aluminum workpiece, and providing a second welding electrode that confronts the steel workpiece. The first welding electrode has an electrode body and an insert that functions to limit or eliminate heat flux into the electrode body. Other steps of the method involve bringing the first and second welding electrodes into contact with opposite sides of the workpiece stack-up and resistance spot welding the stack-up.

    Abstract translation: 钢工件和铝或铝合金工件的电阻点焊方法包括几个步骤。 在一个步骤中，提供了工件叠层。 工件堆叠包括钢工件和铝或铝合金工件。 另一步骤是提供面对铝工件的第一焊接电极，并提供面对钢工件的第二焊接电极。 第一焊接电极具有用于限制或消除热通量进入电极体的电极体和插入物。 该方法的其他步骤包括使第一焊接电极和第二焊接电极与工件叠置的相对侧接触，并且电阻点焊叠层。

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