公开(公告)号：US10058949B2

公开(公告)日：2018-08-28

申请号：US14503504

申请日：2014-10-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Blair E. Carlson ,  David Yang ,  David R. Sigler ,  Robert T. Szymanski ,  Anil K. Sachdev

IPC: B23K9/28 ,  B23K11/00 ,  B23K11/20 ,  B23K11/11 ,  B23K103/20

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

Abstract: A method of resistance spot welding a steel workpiece and an aluminum or aluminum alloy workpiece together includes several steps. One step involves inserting a cover between the aluminum or aluminum alloy workpiece and an adjacent welding electrode. In another step, the adjacent welding electrode is pressed against cover, and another opposed welding electrode is pressed against the steel workpiece at a weld site. In yet another step, electrical current is passed between the welding electrodes, passed through the cover, and passed through the workpieces in order to initiate and grow a molten weld pool within the aluminum or aluminum alloy workpiece.

公开(公告)号：US20150096961A1

公开(公告)日：2015-04-09

申请号：US14503504

申请日：2014-10-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Blair E. Carlson ,  David Yang ,  David R. Sigler ,  Robert T. Szymanski ,  Anil K. Sachdev

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

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

Abstract: A method of resistance spot welding a steel workpiece and an aluminum or aluminum alloy workpiece together includes several steps. One step involves inserting a cover between the aluminum or aluminum alloy workpiece and an adjacent welding electrode. In another step, the adjacent welding electrode is pressed against cover, and another opposed welding electrode is pressed against the steel workpiece at a weld site. In yet another step, electrical current is passed between the welding electrodes, passed through the cover, and passed through the workpieces in order to initiate and grow a molten weld pool within the aluminum or aluminum alloy workpiece.

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。 一步涉及在铝或铝合金工件和相邻焊接电极之间插入盖子。 在另一步骤中，将相邻的焊接电极压在盖上，另一个相对的焊接电极在焊接部位被压在钢工件上。 在另一个步骤中，电流在焊接电极之间通过，穿过盖子并通过工件，以便引发和生长铝或铝合金工件内的熔融焊池。

公开(公告)号：US10239152B2

公开(公告)日：2019-03-26

申请号：US15498204

申请日：2017-04-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Blair E. Carlson ,  Robert T. Szymanski ,  Yuri Hovanski ,  Spyros P. Mellas ,  Kenneth Ross

IPC: B23K20/12

Abstract: A bobbin tool is disclosed that includes a top shoulder, a bottom shoulder, and an axial pin that extends between the top and bottom shoulders. The bottom shoulder has an annular shoulder end surface, a back surface opposite the annular shoulder end surface, and a side surface that joins the annular shoulder end surface and the back surface. One or more and radially-extending blades may be disposed on the side surface of the bottom shoulder and/or one or more axially-extending blades may be disposed on the back surface. The one or more blades provide the bobbin tool with an ability to friction stir weld a variable thickness workpiece assembly, axially plunged through the workpiece assembly along an axis of rotation of the bobbin tool, and/or be extracted through the workpiece assembly along an axis of rotation of the bobbin tool.

公开(公告)号：US20170304934A1

公开(公告)日：2017-10-26

申请号：US15498204

申请日：2017-04-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Blair E. Carlson ,  Robert T. Szymanski ,  Yuri Hovanski ,  Spyros P. Mellas ,  Kenneth Ross

IPC: B23K20/12

CPC classification number: B23K20/1255 ,  B23K20/1265

Abstract: A bobbin tool is disclosed that includes a top shoulder, a bottom shoulder, and an axial pin that extends between the top and bottom shoulders. The bottom shoulder has an annular shoulder end surface, a back surface opposite the annular shoulder end surface, and a side surface that joins the annular shoulder end surface and the back surface. One or more and radially-extending blades may be disposed on the side surface of the bottom shoulder and/or one or more axially-extending blades may be disposed on the back surface. The one or more blades provide the bobbin tool with an ability to friction stir weld a variable thickness workpiece assembly, axially plunged through the workpiece assembly along an axis of rotation of the bobbin tool, and/or be extracted through the workpiece assembly along an axis of rotation of the bobbin tool.