公开(公告)号：US09440305B2

公开(公告)日：2016-09-13

申请号：US13783343

申请日：2013-03-03

Applicant: GM Global Technology Operations LLC

Inventor： David R. Sigler ,  Michael J. Karagoulis

IPC: B23K11/11 ,  B23K35/30 ,  B23K11/30 ,  B23K35/22

CPC classification number: B23K11/3063 ,  B23B5/166 ,  B23K11/11 ,  B23K11/115 ,  B23K35/222 ,  B23K35/302 ,  B23K2103/10

Abstract: A method of resistance spot welding aluminum alloy workpieces together includes several steps. In one step a welding electrode is provided. The welding electrode has a weld face. In another step, the weld face of the welding electrode is shaped to have a desired radius of curvature. The shaped weld face is then textured to a desired surface roughness, and resistance spot welding using the welding electrode is performed to the aluminum alloy workpieces. In yet another step, the weld face is dressed to an extent sufficient to remove contamination build-up that may have accumulated on the weld face from the aluminum alloy workpieces.

Abstract translation: 铝合金工件电阻点焊方法包括几个步骤。 在一个步骤中，提供焊接电极。 焊接电极具有焊接面。 在另一步骤中，焊接电极的焊接面被成形为具有期望的曲率半径。 然后将成形的焊接面纹理为所需的表面粗糙度，并且对铝合金工件进行使用焊接电极的电阻点焊。 在另一个步骤中，焊接面的修整程度足以消除可能从铝合金工件积聚在焊接面上的污染物积聚。

公开(公告)号：US20150231729A1

公开(公告)日：2015-08-20

申请号：US14181020

申请日：2014-02-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David S. Yang ,  David R. Sigler ,  Blair E. Carlson ,  James G. Schroth ,  Michael J. Karagoulis

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

CPC classification number: B23K11/20 ,  B23K11/115 ,  B23K11/3009 ,  B23K11/3018 ,  B23K35/0205 ,  B23K35/0261 ,  B23K2103/20

Abstract: A method of spot welding a workpiece stack-up that includes a steel workpiece and an aluminum alloy workpiece involves passing an electrical current through the workpieces and between welding electrodes that are constructed to affect the current density of the electrical current. The welding electrodes, more specifically, are constructed to render the density of the electrical current greater in the steel workpiece than in the aluminum alloy workpiece. This difference in current densities can be accomplished by passing, at least initially, the electrical current between a weld face of the welding electrode in contact with the steel workpiece and a perimeter region of a weld face of the welding electrode in contact with the aluminum alloy workpiece.

Abstract translation: 对包括钢工件和铝合金工件的工件叠层进行点焊的方法包括使电流通过工件和焊接电极之间，其被构造为影响电流的电流密度。 更具体地说，焊接电极被构造成使得钢工件中的电流密度比铝合金工件中的电流密度更大。 电流密度的这种差异可以通过使焊接电极的与焊接工件接触的焊接面和焊接电极的与焊接接触的焊接面的周边区域的至少最初的电流通过， 工件。

公开(公告)号：US20140360986A1

公开(公告)日：2014-12-11

申请号：US14268422

申请日：2014-05-02

Applicant: GM Global Technology Operations LLC

Inventor： David R. Sigler ,  Blair E. Carlson ,  Mahmoud H. Abd Elhamid

IPC: B23K11/18 ,  B23K11/20 ,  B23K11/34 ,  B23K11/11

CPC classification number: B23K11/34 ,  B23K11/115 ,  B23K2103/20

Abstract: Resistance spot welding of a steel workpiece to an aluminum or an aluminum alloy workpiece can be facilitated by replacing the refractory aluminum oxide-based layer(s) on at least the faying surface of the aluminum or aluminum alloy workpiece with a protective coating that is more conducive to the spot welding process. The protective coating may be a metallic coating or a metal oxide conversion coating. In a preferred embodiment, the protective coating is a coating of zinc, tin, or an oxide of titanium, zirconium, chromium, or silicon.

Abstract translation: 通过在铝或铝合金工件的至少接合表面上更换耐火材料氧化铝基层，使用更多的保护涂层，可以促进钢工件对铝或铝合金工件的电阻点焊 有利于点焊过程。 保护涂层可以是金属涂层或金属氧化物转化膜。 在优选的实施方案中，保护涂层是锌，锡或钛，锆，铬或硅的氧化物的涂层。

公开(公告)号：US11084119B2

公开(公告)日：2021-08-10

申请号：US15992748

申请日：2018-05-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Yang ,  David R. Sigler ,  Blair E. Carlson ,  James G. Schroth ,  Michael J. Karagoulis

IPC: B23K11/20 ,  B23K11/30 ,  B23K35/02 ,  B23K11/11 ,  B23K103/20

Abstract: A method of spot welding a workpiece stack-up that includes a steel workpiece and an aluminum alloy workpiece involves passing an electrical current through the workpieces and between welding electrodes that are constructed to affect the current density of the electrical current. The welding electrodes, more specifically, are constructed to render the density of the electrical current greater in the steel workpiece than in the aluminum alloy workpiece. This difference in current densities can be accomplished by passing, at least initially, the electrical current between a weld face of the welding electrode in contact with the steel workpiece and a perimeter region of a weld face of the welding electrode in contact with the aluminum alloy workpiece.

公开(公告)号：US11065710B2

公开(公告)日：2021-07-20

申请号：US15920784

申请日：2018-03-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David R. Sigler ,  Blair E. Carlson ,  Charles E. Jensen

IPC: B23K11/20 ,  B23K37/04 ,  B23K11/11

Abstract: A method of resistance spot welding a workpiece stack-up. The workpiece stack-up includes at least a steel workpiece and an aluminum workpiece. The method involves attaching a steel plate to the steel workpiece at a weld-site of the workpiece stack-up, passing electrical current between a first welding electrode and a second welding electrode at the weld-site, and terminating passage of electrical current between the first and second welding electrodes in order to form a weld joint. The steel plate serves to stiffen the weld joint.

公开(公告)号：US10981243B2

公开(公告)日：2021-04-20

申请号：US15976163

申请日：2018-05-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David R. Sigler ,  Blair E. Carlson ,  Yelena Myasnikova ,  Michael J. Karagoulis

IPC: B23K11/20 ,  B23K11/11 ,  B23K103/20

Abstract: A workpiece stack-up that includes at least a steel workpiece and an aluminum-based workpiece can be resistance spot welded by employing a multi-stage spot welding method in which the passage of electrical current is controlled to perform multiple stages of weld joint development.

公开(公告)号：US10682724B2

公开(公告)日：2020-06-16

申请号：US15491566

申请日：2017-04-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David R. Sigler ,  Blair E. Carlson ,  Michael J. Karagoulis

IPC: B23K11/20 ,  B23K11/11 ,  B23K11/31 ,  B23K11/30 ,  B23K11/24 ,  B23K11/18 ,  B23K11/16 ,  B23K103/04 ,  B23K103/10 ,  B23K103/20 ,  B23K101/00 ,  B23K101/18

Abstract: A series of many electrical resistance spot welds is to be formed in members of an assembled, but un-joined, body that presents workpiece stack-ups of various combinations of metal workpieces including all aluminum workpieces, all steel workpieces, and a combination of aluminum and steel workpieces. A pair of spot welding electrodes, each with a specified weld face that includes oxide-disrupting features, is used to form the required numbers of aluminum-to-aluminum spot welds, aluminum-to-steel spot welds, and steel-to-steel spot welds. A predetermined sequence of forming the various spot welds may be specified for extending the number of spot welds that can be made before the weld faces must be restored. And, during at least one of the aluminum-to-steel spot welds, a cover is inserted between the weld face of one of the welding electrodes and a side of a workpiece stack-up that includes the adjacent aluminum and steel workpieces.

公开(公告)号：US10675702B2

公开(公告)日：2020-06-09

申请号：US15434760

申请日：2017-02-16

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Blair E. Carlson ,  David R. Sigler

IPC: B23K11/11 ,  B23K11/20 ,  B23K11/34 ,  C09J5/10 ,  C09J5/06 ,  B23K103/20

Abstract: A method of adhesive weld bonding a light metal workpiece and a steel workpiece is disclosed that includes applying a plurality of discrete adhesive ribbons to a faying surface of the light metal workpiece, the faying surface of the steel workpiece, or both faying surfaces, and then assembling the workpieces together to establish one or more adhesive zones between the faying surfaces of the light metal and steel workpieces and a plurality of adhesive free zones amongst the adhesive zone(s). The method further includes forming a resistance spot weld that bonds the the light metal workpiece and the steel workpiece together at a spot weld location within one of the adhesive free zones. The formed spot weld includes a weld joint contained within the light metal workpiece that bonds to the faying interface of the steel workpiece.

公开(公告)号：US20190283168A1

公开(公告)日：2019-09-19

申请号：US15920784

申请日：2018-03-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David R. Sigler ,  Blair E. Carlson ,  Charles E. Jensen

IPC: B23K11/20 ,  B23K11/11 ,  B23K37/04

Abstract: A method of resistance spot welding a workpiece stack-up. The workpiece stack-up includes at least a steel workpiece and an aluminum workpiece. The method involves attaching a steel plate to the steel workpiece at a weld-site of the workpiece stack-up, passing electrical current between a first welding electrode and a second welding electrode at the weld-site, and terminating passage of electrical current between the first and second welding electrodes in order to form a weld joint. The steel plate serves to stiffen the weld joint.

公开(公告)号：US10259071B2

公开(公告)日：2019-04-16

申请号：US15074690

申请日：2016-03-18

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David R. Sigler ,  Blair E. Carlson ,  Michael J. Karagoulis ,  David P. Kelly

IPC: B23K11/30 ,  B23K11/20 ,  B23K35/02 ,  B23K35/32 ,  B23K103/20

Abstract: A resistive welding electrode includes at least a weld face constructed of a refractory-based material that exhibits an electrical conductivity that is less than or equal to 65% of the electrical conductivity of commercially pure annealed copper as defined by the International Annealed Copper Standard (IACS). A method of using the resistive welding electrode to resistance spot weld a workpiece stack-up that includes an aluminum alloy workpiece and steel workpiece that overlap and contact each other at a faying interface is also disclosed.