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    System and method of enhanced automated welding of first and second workpieces
    1.
    发明授权
    System and method of enhanced automated welding of first and second workpieces 有权

    公开(公告)号：US11498157B2

    公开(公告)日：2022-11-15

    申请号：US16778870

    申请日：2020-01-31

    Applicant: GM Global Technology Operations LLC

    Inventor： Pei-Chung Wang ,  Spyros P Mellas ,  Miguel A Saez ,  John P Spicer

    IPC: B23K26/08 ,  B23K9/095 ,  B23K31/12 ,  B23K9/127

    Abstract: A system and method of enhanced automated welding of a first workpiece and a second workpiece are provided. The method comprises providing a system for intelligent robot-based welding of the first workpiece and the second workpiece. The method further comprises determining a geometrical location of the first workpiece and the second workpiece to be welded at a welding sequence based a predetermined process variable. The method further comprises adjusting the predetermined process variable based on the geometrical location of the first and second workpieces to define an actual process variable. The method further comprises welding a first portion of the first and second workpieces with the actual process variable to define a first welded portion. The method further comprises determining a weld quality of the first welded portion.

    Blind flow screw joining of materials
    2.
    发明授权
    Blind flow screw joining of materials 有权

    公开(公告)号：US10675671B2

    公开(公告)日：2020-06-09

    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 ,  F16B19/10 ,  B21J15/04 ,  B21J15/14 ,  F16B25/00

    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.

    SELF-ADJUSTING WIRE FOR WELDING APPLICATIONS
    7.
    发明申请
    SELF-ADJUSTING WIRE FOR WELDING APPLICATIONS 审中-公开
    用于焊接应用的自调整线

    公开(公告)号：US20140138366A1

    公开(公告)日：2014-05-22

    申请号：US14076639

    申请日：2013-11-11

    Applicant: GM Global Technology Operations LLC

    Inventor： Jing Zhang ,  Pei-Chung Wang ,  David Yang

    IPC: B23K35/22

    CPC classification number: B23K35/22 ,  B23K35/0255 ,  B23K35/0261 ,  B23K35/0266 ,  B23K35/286 ,  B23K35/30 ,  B23K35/302 ,  B23K35/3033 ,  B23K35/3066 ,  B23K35/32 ,  B23K35/325 ,  C22C37/00 ,  C22C38/04 ,  C22C38/08 ,  C22C38/18

    Abstract: Disclosed are self-adjusting wires, methods of making these self-adjusting wires, and thermal joining processes (such as gas metal arc welding or laser brazing) and other processes using these self-adjusting wires. The wires have a core of a metal or metal alloy suitable as a joining material in the joining process and an exterior layer of a shape-memory alloy, which may be continuous about the exterior of the core or discontinuous such as a longitudinal strip or strips. The shape-memory alloy of the self-adjusting wire is “trained” to a straight-wire shape in its austenite phase. In using the self-adjusting wire in a process, a bent end of the self-adjusting wire is straightened by heating the self-adjusting wire above the austenite phase transition temperature of the shape-memory alloy.

    Abstract translation: 公开了自调整线，制造这些自调整线的方法，以及使用这些自调节线的热接合工艺（例如气体金属电弧焊或激光钎焊）等工艺。 电线具有适合作为接合过程中的接合材料的金属或金属合金的芯和形状记忆合金的外层，其可以围绕芯的外部连续或不连续地连续，例如纵向条或条 。 自调整丝的形状记忆合金在其奥氏体相中被“训练成”为直线形状。 在使用自调整线的过程中，通过将自调整线加热到形状记忆合金的奥氏体相变温度以上，自调整线的弯曲端部被拉直。

    Fabricated-in-place inserts to receive self-piercing rivets
    8.
    发明授权
    Fabricated-in-place inserts to receive self-piercing rivets 有权

    公开(公告)号：US10352347B2

    公开(公告)日：2019-07-16

    申请号：US15396925

    申请日：2017-01-03

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Blair E. Carlson ,  Pei-Chung Wang

    IPC: F16B19/08 ,  B21J15/04 ,  B22D19/00 ,  B21J15/02 ,  B22D19/04 ,  F16B5/04 ,  B29C70/76 ,  B29C65/56 ,  B29C65/00 ,  B29C65/82 ,  B29L31/30

    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.

    Method of riveting involving ultrasonic pulses
    10.
    发明授权
    Method of riveting involving ultrasonic pulses 有权

    公开(公告)号：US10189075B2

    公开(公告)日：2019-01-29

    申请号：US15413524

    申请日：2017-01-24

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Pei-Chung Wang ,  Bradley J. Blaski ,  Richard C. Janis ,  Susan M. Smyth

    IPC: B21J15/12 ,  B21J15/02 ,  B21J15/04 ,  B21J15/08 ,  B21J15/14 ,  B21J15/36 ,  F16B5/04 ,  F16B19/08 ,  F16B19/10

    Abstract: A method of riveting a first substrate and a second substrate with a rivet includes delivering a first ultrasonic pulse to a respective exterior surface of the first substrate at a predefined target area, via an ultrasonic device. The first ultrasonic pulse is configured to soften the first substrate at a first softening temperature. The method includes attaching a crust layer on a rivet head of the rivet. A second ultrasonic pulse is delivered to the predefined target area to soften the crust layer at a second softening temperature, via the ultrasonic device. A surface profile of the crust layer is fashioned via compression of a horn inner cavity of the ultrasonic device over the crust layer. The crust layer is cooled to harden into a seal configured to prevent entry of moisture between the rivet and the respective exterior surface of the first substrate, thereby reducing galvanic corrosion.

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