公开(公告)号：US20150352659A1

公开(公告)日：2015-12-10

申请号：US14724070

申请日：2015-05-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David R. Sigler ,  Blair E. Carlson ,  David Yang ,  Hui-Ping Wang

IPC: B23K11/36 ,  B23K11/20 ,  B23K11/11

CPC classification number: B23K11/36 ,  B23K11/115 ,  B23K11/20 ,  B23K2103/20

Abstract: A method of spot welding a workpiece stack-up that includes a steel workpiece and an adjacent aluminum alloy workpiece involves passing an electrical current through the workpieces and between opposed welding electrodes. The formation of a weld joint between the adjacent steel and aluminum alloy workpieces is aided by a cover plate that is located between the aluminum alloy workpiece that lies adjacent to the steel workpiece and the welding electrode disposed on the same side of the workpiece stack-up. The cover plate, which includes an intruding feature, affects the flow pattern and density of the electrical current that passes through the adjacent steel and aluminum alloy workpieces in a way that helps improve the strength of the weld joint.

Abstract translation: 点焊包括钢工件和相邻铝合金工件的工件叠层的方法包括使电流通过工件和相对的焊接电极之间。 在相邻的钢和铝合金工件之间形成焊接接头由位于与钢工件相邻的铝合金工件与设置在工件叠层的同一侧的焊接电极之间的盖板辅助 。 包括入侵特征的盖板以有助于提高焊接接头的强度的方式影响穿过相邻钢和铝合金工件的电流的流动模式和密度。

公开(公告)号：US20150352658A1

公开(公告)日：2015-12-10

申请号：US14729693

申请日：2015-06-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Yang ,  David R. Sigler ,  Hui-Ping Wang

IPC: B23K11/11 ,  B23K11/20

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

Abstract: A method of spot welding a workpiece stack-up that includes a steel workpiece and an adjacent aluminum alloy workpiece involves passing an electrical current through the workpiece stack-up and between facially aligned welding electrodes in contact with opposed sides of the stack-up. The formation of a weld joint between the adjacent steel and aluminum alloy workpieces is aided by an intruding feature located in an aluminum alloy workpiece that provides and delineates one side of the workpiece stack-up and against which a welding electrode is pressed over the intruding feature at the weld site. The intruding feature affects the flow pattern and density of the electrical current that passes through the overlapping workpieces and is also believed to help minimize the effects of any refractory surface oxide layer(s) that may be present on the aluminum alloy workpiece that lies adjacent to the steel workpiece.

Abstract translation: 点焊包括钢工件和相邻的铝合金工件的工件堆叠的方法包括使电流通过工件叠层以及与堆叠的相对侧接触的面对齐的焊接电极之间。 在相邻的钢和铝合金工件之间形成焊接接头由位于铝合金工件中的入侵特征辅助，其提供并描绘了工件叠层的一侧，并且焊接电极被压在入侵特征上 在焊接部位。 入侵特征影响通过重叠工件的电流的流动模式和密度，并且还被认为有助于最小化可能存在于铝合金工件上的任何难熔表面氧化物层的影响， 钢工件。

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。