-
公开(公告)号：US10245675B2
公开(公告)日：2019-04-02
申请号：US14883249
申请日：2015-10-14
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David R. Sigler , Blair E. Carlson , Michael J. Karagoulis
IPC: B23K11/20 , B23K11/11 , B23K11/18 , B23K11/24 , B23K103/20
Abstract: A workpiece stack-up that includes at least a steel workpiece and an adjacent and overlapping aluminum workpiece can be resistance spot welded by a multi-stage spot welding method. The multi-stage spot welding method involves initially forming a weld joint between the steel and aluminum workpieces. The weld joint extends into the aluminum workpiece from the faying interface of the two workpieces and includes an interfacial weld bond area adjacent to and joined with the faying surface of the steel workpiece. After the weld joint is initially formed, the multi-stage spot welding method calls for remelting and resolidifying at least a portion of the weld joint that includes some or all of the interfacial weld bond area. At least a portion of the resultant refined weld joint may then be subjected to the same remelting and resolidifying practice, if desired. Multiple additional practices of remelting and resolidifying may be carried out.
-
公开(公告)号：US10052710B2
公开(公告)日：2018-08-21
申请号：US14462655
申请日：2014-08-19
Applicant: GM Global Technology Operations LLC
Inventor： David R. Sigler , Blair E. Carlson , Michael J. Karagoulis
CPC classification number: B23K11/20 , B23K11/115 , B23K11/30 , B23K11/3063 , B23K35/0205 , B23K35/0288 , B23K35/3053 , B23K35/327 , B23K2103/20
Abstract: A method of resistance spot welding a steel workpiece and an aluminum or aluminum alloy (“aluminum”) workpiece together includes several steps. One step involves providing a workpiece stack-up with a steel workpiece and an aluminum workpiece. Another step involves attaching a cover over a weld face of a welding electrode. The cover is made of a metal material with an electrical resistivity that is greater than an electrical resistivity of a material of the welding electrode. Yet another step involves performing multiple individual resistance spot welds to the workpiece stack-up. The cover abuts the aluminum workpiece while the individual resistance spot welds are performed. And another step involves removing the cover from the welding electrode after the individual spot welds are performed.
-
公开(公告)号：US10010966B2
公开(公告)日：2018-07-03
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
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.
-
公开(公告)号：US09999939B2
公开(公告)日：2018-06-19
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: B23K11/10 , B23K11/20 , B23K11/11 , B23K11/30 , B23K103/20
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.
-
公开(公告)号：US20170304925A1
公开(公告)日：2017-10-26
申请号：US15137778
申请日：2016-04-25
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David R. Sigler , David S. Yang , Anil K. Sachdev
Abstract: A method of resistance spot welding a workpiece stack-up that includes an aluminum workpiece and an adjacent overlapping steel workpiece is disclosed. The method uses a first welding electrode positioned proximate the aluminum workpiece and a second welding electrode positioned proximate the steel workpiece to effectuate the spot welding process. In an effort to positively affect the strength of the ultimately-formed weld joint, external heat may be supplied to the first welding electrode by an external heating source disposed in heat transfer relation with the first welding electrode either before or after, or both before or after, an electrical current is passed between the first and second welding electrodes to create a molten aluminum weld pool within the aluminum workpiece.
-
Patent Agency Ranking
26.发明申请公开(公告)号：US20170297138A1
公开(公告)日：2017-10-19
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 , B23K11/24 , B23K11/11 , B23K11/31 , B23K11/30 , B23K103/20 , B23K103/04 , B23K103/10
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：US09737956B2
公开(公告)日：2017-08-22
申请号：US13918244
申请日：2013-06-14
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David Yang , Michael J. Karagoulis , David R. Sigler
CPC classification number: B23K11/115 , B23K11/0033 , B23K11/166
Abstract: Resistance spot welding of a thin-gauge steel workpiece to another steel workpiece is achieved through the combined use of specific spot welding electrodes and a pulsating welding current. Each of the spot welding electrodes has a weld face that is smaller in diameter than a typical steel spot welding electrode. And the pulsating welding current that is used in conjunction with the smaller-sized spot welding electrodes includes at least two stages of electrical current pulses.
-
28.发明申请公开(公告)号：US20170232548A1
公开(公告)日：2017-08-17
申请号：US15434760
申请日：2017-02-16
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Blair E. Carlson , David R. Sigler
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.
-
29.发明申请公开(公告)号：US20150053655A1
公开(公告)日：2015-02-26
申请号：US14464476
申请日：2014-08-20
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David R. Sigler , Blair E. Carlson , Yelena Myasnikova , Michael J. Karagoulis
CPC classification number: B23K11/20 , B23K11/115 , B23K2103/20
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. The multiple stages include: (1) a molten weld pool growth stage in which a molten weld pool is initiated and grown within the aluminum-based workpiece; (2) a molten weld pool solidification stage in which the molten weld pool is allowed to cool and solidify into a weld nugget that forms all or part of a weld joint; (3) a weld nugget re-melting stage in which at least a portion of the weld nugget is re-melted; and (4) a re-melted weld nugget solidification stage in which the re-melted portion of the weld nugget is allowed to cool and solidify.
Abstract translation: 包括至少钢工件和铝基工件的工件叠层可以通过采用多级点焊方法进行电阻点焊，其中电流通过被控制以进行多个焊接接头显影阶段。 多级包括：（1）熔融熔池生长阶段，其中熔融熔池在铝基工件内启动和生长; （2）熔融熔池固化阶段，使熔融熔池冷却固化成形成焊接接头的全部或部分的焊接熔核; （3）焊接熔核再熔化阶段，其中至少一部分焊点熔化; 和（4）再熔融的焊点固化阶段，其中焊接熔核的再熔化部分被允许冷却和固化。
-
公开(公告)号：US20140231396A1
公开(公告)日：2014-08-21
申请号：US13769457
申请日：2013-02-18
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David Yang , David R. Sigler , Jing Zhang
IPC: B23K11/11
CPC classification number: B23K11/11 , B23K11/115 , B23K11/3018 , B23K11/36
Abstract: A method for improving a resistance spot weld includes stacking two or more metal sheets and positioning first and second opposed electrodes on opposite sides of the metal stack. At least one of the metal sheets is chilled in the region where the weld is to be made. Weld current is applied to the electrodes and passes through the metal sheets to create the electric resistance spot weld only after the chilling of the at least one metal sheet reduces the temperature at the faying interface at least 5° C., thereby improving the formation of the weld nugget and quality of the weld joint. The chilling can be obtained by flowing chilled gas onto the surface of one or both of the outermost metal sheets, or by contacting the outermost metal sheets with the chilled electrode for a period of time prior to applying the weld current.
Abstract translation: 一种改善电阻点焊的方法包括堆叠两个或更多个金属片，并将第一和第二相对电极定位在金属叠层的相对侧上。 在要制造焊缝的区域中至少有一个金属片被冷却。 焊接电流施加到电极并通过金属片，以在仅在至少一个金属片的冷却将接合界面的温度降低至少5℃之后才产生电阻点焊，从而改善形成 焊点和焊缝质量。 可以通过将冷却气体流到一个或两个最外面的金属板的表面上，或者通过在施加焊接电流之前将最外面的金属板与冷却的电极接触一段时间来获得冷却。
-
-
-
-
-
-
-
-
-
Search Results
98
records
(took 0.031 seconds)
