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：US09586282B2

公开(公告)日：2017-03-07

申请号：US13797604

申请日：2013-03-12

Applicant: GM Global Technology Operations LLC

Inventor： David Yang

IPC: B23K26/00 ,  B23K9/00 ,  B23K15/00 ,  B23K26/32

CPC classification number: B23K9/0026 ,  B23K15/0093 ,  B23K26/142 ,  B23K26/322 ,  B23K2101/34 ,  B23K2103/08

Abstract: Methods for welding a joint are disclosed herein. One example of the method involves welding the joint between two workpieces. Energy is focused onto the joint to weld the joint. The focus of the energy moves relative to the joint. A vaporized material is displaced from a keyhole created by the welding. The vaporized material is vaporized by the energy. A pool of molten material is formed adjacent the keyhole during operation of the energy at the joint. The pool of molten material is manipulated by displacing a portion of the molten material from a near end of the pool and from lateral sides of the pool to a far end of the pool. The far end of the pool is distal to the near end.

Abstract translation: 本文公开了焊接接头的方法。 该方法的一个实例包括在两个工件之间焊接接头。 能量集中在接头上以焊接接头。 能量的重点相对于关节移动。 蒸发的材料从由焊接产生的锁孔移位。 蒸发的物质被能量汽化。 在接头处的能量运行期间，在锁眼附近形成熔融材料池。 通过将熔融材料的一部分从池的近端和从池的侧边移位到池的远端来操纵熔融材料池。 游泳池的远端远近近端。

公开(公告)号：US20150231730A1

公开(公告)日：2015-08-20

申请号：US14181955

申请日：2014-02-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Yang ,  David R. Sigler

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

CPC classification number: B23K11/20 ,  B23K11/115 ,  B23K11/14 ,  B23K11/3009 ,  B23K11/314 ,  B23K2103/20

Abstract: A method of resistance spot welding a steel workpiece and an aluminum or aluminum alloy workpiece (“aluminum 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 workpiece. Another step involves forming a protuberance in the steel workpiece. In another step a first and second welding electrode is provided. Yet another step involves clamping the first and second welding electrodes over the workpiece stack-up and over the protuberance. And another step involves performing one or more individual resistance spot welds to the workpiece stack-up.

Abstract translation: 钢工件和铝或铝合金工件（“铝工件”）的电阻点焊方法一起包括几个步骤。 在一个步骤中，提供了工件叠层。 工件堆叠包括钢工件和铝工件。 另一个步骤涉及在钢工件中形成突起。 在另一步骤中，提供第一和第二焊接电极。 另一步骤是将第一焊接电极和第二焊接电极夹紧在工件叠层上和突起上。 另一个步骤涉及对工件叠层执行一个或多个单独的电阻点焊。

公开(公告)号：US20150096962A1

公开(公告)日：2015-04-09

申请号：US14503969

申请日：2014-10-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David R. Sigler ,  James G. Schroth ,  Blair E. Carlson ,  Yelena Myasnikova ,  David Yang

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

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

Abstract: A resistance spot welding method may involve spot welding a workpiece stack-up that includes a steel workpiece and an aluminum alloy workpiece that overlap one another to provide a faying interface. A pair of opposed welding electrodes are pressed against opposite sides of the workpiece stack-up with one welding electrode contacting the aluminum alloy workpiece and the other welding electrode contacting the steel workpiece. The welding electrodes are constructed so that, when an electrical current is passed between the electrodes and through the workpiece stack-up, the electrical current has a greater current density in the steel workpiece than in the aluminum alloy workpiece to thereby concentrate heat within a smaller zone in the steel workpiece. Concentrating heat within a smaller zone in the steel workpiece is believed to modify the solidification behavior of the resultant molten aluminum alloy weld pool in a desirable way.

Abstract translation: 电阻点焊方法可以包括点焊包括钢工件和铝合金工件的工件叠层，以使其彼此重叠以提供接合界面。 一对相对的焊接电极被压在工件堆叠的相对两侧，一个焊接电极与铝合金工件接触，另一个焊接电极与钢工件接触。 焊接电极被构造成使得当电极在电极之间通过并且通过工件堆叠时，电流在钢工件中的电流密度比在铝合金工件中大，从而将热量集中在较小的 钢工件区。 认为在钢工件的较小区域内集中热量以所需的方式改变所得熔融铝合金焊池的凝固特性。

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：US20140367368A1

公开(公告)日：2014-12-18

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

IPC: B23K11/11 ,  B23K11/16

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 by 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.

Abstract translation: 通过组合使用特定的点焊电极和脉动焊接电流，实现了薄钢板工件对另一个钢工件的电阻点焊。 每个点焊电极的直径小于典型的钢点焊电极的焊接面。 并且与较小尺寸的点焊电极结合使用的脉动焊接电流包括至少两级的电流脉冲。

公开(公告)号：US11491580B2

公开(公告)日：2022-11-08

申请号：US16614561

申请日：2017-06-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Yang ,  Wu Tao

IPC: B23K26/244 ,  B23K26/082 ,  B23K26/354 ,  B23K26/06 ,  B23K26/08 ,  B23K26/322 ,  B23K103/08 ,  B23K103/10 ,  B23K103/04

Abstract: A method of laser welding together two or more overlapping metal workpieces (12, 14, or 12, 150, 14) included in a welding region (16) of a workpiece stack-up (10) involves advancing a beam spot (44) of a laser beam (24) relative to a top surface (20) of the workpiece stack-up along a first weld path (72) in a first direction (74) to form an elongated melt puddle (76) and, then, advancing the beam spot (44) of the laser beam (24) along a second weld path (78) in a second direction (80) that is opposite of the first direction while the elongated melt puddle is still in a molten state. The first weld path and the second weld path overlap so that the beam spot of the laser beam is conveyed through the elongated melt puddle when the beam spot is advanced along the second weld path.

公开(公告)号：US11148226B2

公开(公告)日：2021-10-19

申请号：US16312141

申请日：2016-07-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Yang ,  Wu Tao

IPC: B23K26/322 ,  B23K26/067 ,  B23K26/22 ,  B23K26/244 ,  B23K101/34

Abstract: A method of laser spot welding a workpiece stack-up (10) that includes at least two overlapping steel workpieces (12, 14, 150) is disclosed. The method includes directing a plurality of laser beams (24, 24′, 24″) at the top surface (20) of the workpiece stack-up to create a molten steel weld pool (92) that penetrates into the stack-up. The molten steel weld pool is then grown to penetrate further into the stack-up by increasing an overall combined irradiance of the laser beams while reducing the total projected sectional area (88) of the laser beams at a plane of the top surface of the workpiece stack-up. Increasing the overall combined irradiance of the laser beams may be accomplished by moving the focal points (66, 66′, 66″) of the laser beams closer to the top surface or by reducing the mean angle of incidence (86) of the laser beams so as to reduce the eccentricity of the individual projected sectional areas of the laser beams.

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：US20190224781A1

公开(公告)日：2019-07-25

申请号：US16336333

申请日：2016-10-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Yang ,  Wu Tao

IPC: B23K26/244 ,  B23K26/04 ,  B23K26/082 ,  B23K26/08 ,  B23K26/322 ,  B23K26/073

Abstract: A method of laser welding a workpiece stack-up (10, 10′) that includes at least two overlapping metal workpieces (12, 150, 14) comprises advancing a beam spot (44) of a laser beam (24) relative to a top surface (20) of the workpiece stack-up (10, 10′) and along a beam travel pattern (66) to form a laser weld joint (64) that fusion welds the metal workpieces (12, 150, 14) together. While the beam spot (44) is being advanced between a first point (76) and a second point (78) of one or more weld paths (74) of the beam travel pattern (66), the position of a focal point (52) of the laser beam (24) is oscillated relative to the top surface (20) of the workpiece N stack-up (10, 10′) along a dimension (68) oriented transverse to the top surface (20).