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公开(公告)号：US20130168367A1
公开(公告)日：2013-07-04
申请号：US13777345
申请日：2013-02-26
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David R. Sigler , Michael J. Karagoulis
IPC: B23K11/30
CPC classification number: B23K11/3009 , B23B5/166 , B23K11/14 , B23K11/3063 , B23K35/0205 , Y10T82/16442 , Y10T83/9372 , Y10T407/19
Abstract: A welding electrode for resistance spot welding includes a weld face comprising rings of ridges that project outwardly from a base surface of the weld face. The rings of ridges are positioned on the weld face to contact and impress into a sheet metal workpiece surface during resistance spot welding. If the welding electrode is used during resistance spot welding of light metal alloy workpieces, such as those of aluminum alloy or magnesium alloy, the rings of ridges on the weld face can contribute to improved welding performance.
Abstract translation: 用于电阻点焊的焊接电极包括焊接面，其包括从焊接面的基面向外突出的脊的环。 在电阻点焊期间，脊的环被定位在焊接面上以接触和压入钣金工件表面。 如果在轻金属合金工件（例如铝合金或镁合金）的电阻点焊期间使用焊接电极，则焊接面上的脊的环可有助于提高焊接性能。
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公开(公告)号：US11123816B2
公开(公告)日：2021-09-21
申请号：US16212147
申请日：2018-12-06
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David R. Sigler , James G. Schroth , Blair E. Carlson , Yelena Myasnikova , David Yang
IPC: B23K11/20 , B23K11/11 , B23K35/02 , B23K103/20
Abstract: A resistance spot welding method may involve spot welding a workpiece stack-up that includes a steel workpiece and an aluminum alloy workpiece. 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.
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公开(公告)号：US11065711B2
公开(公告)日：2021-07-20
申请号：US16178806
申请日：2018-11-02
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Amberlee S. Haselhuhn , David R. Sigler
IPC: B23K11/20 , B23K11/11 , B23K11/30 , B23K35/02 , B23K11/31 , B23K103/20 , B23K101/00
Abstract: An electrical resistance spot welding electrode is disclosed for contact with a narrow or other selected spot weld region in a steel workpiece in a stack-up with an aluminum alloy workpiece for use in a spot welding method in which the weld nugget is carefully formed in the aluminum workpiece at the interface of the stack-up. The welding face of the welding electrode for contact with the steel workpiece is shaped with an aspect ratio greater than one, which fits against the contact surface of the steel workpiece, while the welding face for the aluminum-contacting weld electrode is circular (with an aspect ratio equal to one). The stack-up of workpieces may include a single steel workpiece facing two aluminum workpieces in a sandwich type stack-up or two steel workpieces facing a single aluminum workpiece with the outer steel workpiece having the narrow contact surface for the steel welding electrode.
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公开(公告)号：US10940557B2
公开(公告)日：2021-03-09
申请号：US15813887
申请日：2017-11-15
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Michael J. Karagoulis , David R. Sigler
Abstract: A programmable polarity module that permits rapid on-demand control of the polarities assigned to the welding electrodes retained on a welding gun is disclosed. The programmable polarity module is electrically connectable to the welding gun and a direct current power supply unit to provide direct current to the welding electrodes for exchange during spot welding. A first interchangeable polarity output lug and a second interchangeable polarity output lug of the programmable polarity module permit the polarities of the welding electrodes to be switched without having to electrically disconnect the module from the welding gun.
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公开(公告)号：US10456856B2
公开(公告)日：2019-10-29
申请号：US15418768
申请日：2017-01-29
Applicant: GM Global Technology Operations LLC
Inventor： David R. Sigler , Blair E. Carlson , Michael J. Karagoulis
Abstract: A cutting tool that can simultaneously cut and restore asymmetric weld face geometries of two welding electrodes that are subject to different degradation mechanisms is disclosed along with a method of using such a cutting tool during resistance spot welding of workpiece stack-ups that include dissimilar metal workpieces. The cutting tool includes a first cutting socket and a second cutting socket. The first cutting socket is defined by one or more first shearing surfaces and the second cutting is defined by one or more second shearing surfaces. The first shearing surface(s) and the second shearing surface(s) are profiled to cut and restore a first weld face geometry and a second weld face geometry, respectively, that are different from each other upon receipt of electrode weld faces within the cutting sockets and rotation of the cutting tool.
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Patent Agency Ranking
公开(公告)号：US10335892B2
公开(公告)日：2019-07-02
申请号：US14556713
申请日：2014-12-01
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David R. Sigler , James G. Schroth , Michael J. Karagoulis
Abstract: A welding electrode for use in resistance spot welding an assembly of overlying metal workpieces that includes an aluminum alloy workpiece is disclosed. The welding electrode includes a body, a convex weld face at one end of the body, and ringed protrusions that project outwardly from the convex weld face. The ringed protrusions are positioned to make contact with, and indent into, a surface of the aluminum alloy workpiece when the convex weld face is pressed against the aluminum alloy workpiece during a spot welding event. When brought into contact with the surface of the aluminum alloy workpiece, the ringed protrusions disrupt the oxide film present on the aluminum alloy workpiece surface, which improves the spot welding process.
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公开(公告)号：US10335891B2
公开(公告)日：2019-07-02
申请号：US13841397
申请日：2013-03-15
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： David R. Sigler , Michael J. Karagoulis
Abstract: A welding electrode for use in engaging an aluminum alloy workpiece during a spot welding process has a weld face that includes a base surface and a plurality of circular ridges that project outwardly from the base surface. The circular ridges are blunted, and their presence on the weld face provides the first welding electrode with several useful capabilities, including the ability to establish better mechanical and electrical contact with the aluminum alloy workpiece.
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公开(公告)号：US20190134735A1
公开(公告)日：2019-05-09
申请号：US15807219
申请日：2017-11-08
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Amberlee S. Haselhuhn , David R. Sigler , Blair E. Carlson
Abstract: A welding electrode and a method of using the welding electrode for resistance spot welding are disclosed. The welding electrode includes a body and a weld face. The weld face includes a central dome portion and a shoulder portion that surrounds the central dome portion and extends from an outer circumference of the weld face upwardly and radially inwardly to the central dome portion. The central dome portion has a series of radially-spaced ringed ridges that project outwardly from a base dome face surface. The series of radially-spaced ringed ridges on the central dome portion includes an innermost ringed ridge and an outermost ringed ridge. The outermost ringed ridge on the central dome portion has a radial inner side surface and a radial outer side surface. The radial outer side surface extends below the base dome face surface down to the shoulder portion of the weld face.
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公开(公告)号：US10189227B2
公开(公告)日：2019-01-29
申请号：US15252878
申请日：2016-08-31
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Anil K. Sachdev , Raja K. Mishra , Jon T. Carter , Tyson W. Brown , Blair E. Carlson , David R. Sigler , Robert N. Saje , Matthew P. Simonin
IPC: B21D26/021 , B32B7/02 , B32B7/04 , B32B15/04 , B32B15/18 , B32B15/20 , B32B27/32 , B21D35/00 , B60R13/02 , B32B37/00
Abstract: A panel assembly is formed by a plurality of bonds between two sheet materials in a face to face relationship to form a preform. The plurality of bonds define a closed perimeter region between the two sheet materials and an open perimeter region between the two sheet materials. The preform may be formed into a predefined shape. Pressurized fluid is applied through an inlet into the open perimeter region to expand the preform. The pressurized fluid expands the open perimeter region such that the two sheet materials expand in an opposing direction, thereby defining an expanded open perimeter region. The closed perimeter region between the two sheet materials remains vacant of the pressurized fluid such that the closed perimeter region is not expanded. The expanded open perimeter region is filled with a filler material for improving a performance characteristic of the panel assembly, e.g., strength, sound absorption, or stiffness.
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公开(公告)号：US20180257166A1
公开(公告)日：2018-09-13
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
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.
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