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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
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。
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公开(公告)号：US20150083694A1
公开(公告)日：2015-03-26
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
CPC classification number: B23K11/3009 , B23K11/115 , B23K11/185 , C21D2251/04
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.
Abstract translation: 公开了一种用于电阻点焊的焊接电极，包括铝合金工件的上覆金属工件的组件。 焊接电极包括主体，主体一端的凸焊接面和从凸焊接面向外突出的环形突起。 当在点焊事件期间将凸焊接面压在铝合金工件上时，环形突起被定位成与铝合金工件的表面接触并压入。 当与铝合金工件的表面接触时，环形突起破坏铝合金工件表面上存在的氧化膜，从而改善了点焊过程。
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公开(公告)号：US11545880B2
公开(公告)日：2023-01-03
申请号：US17077318
申请日：2020-10-22
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： John S. Agapiou , James G. Schroth
Abstract: Stator cores and methods for fabricating stator cores are provided. An exemplary stator core includes a stack of laminations. Each lamination in the stack of laminations comprises a yoke and a plurality of tooth segments fixed to the yoke.
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公开(公告)号：US11006053B2
公开(公告)日：2021-05-11
申请号：US16525731
申请日：2019-07-30
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Megan E. McGovern , Teresa J. Rinker , Sean R. Wagner , Ryan C. Sekol , James G. Schroth , Michael J. Bland
IPC: H04N5/33 , G01N21/95 , G01N21/3563
Abstract: A weld inspection system is adapted to inspect a weld of a work product via thermographic technology. The weld inspection system includes a heat source assembly, a thermal imaging camera, and a controller. The heat source assembly is adapted to sequentially direct a plurality of heat pulses upon the work product from varying perspectives and within a pre-determined time period. Thea thermal imaging camera is configured to thermally image the weld over the pre-determined time period and collect thermal imaging data of heat dissipation from the work product. The thermal imaging data is associated with the weld and the plurality of heat pulses. The controller is configured to control the heat source assembly and the thermal imaging camera. The controller includes a processor configured to receive and transform the thermal imaging data into a binary image for evaluation of the weld.
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公开(公告)号：US10576565B2
公开(公告)日：2020-03-03
申请号：US15273923
申请日：2016-09-23
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： James G. Schroth , Thomas A. Perry , Hongliang Wang , Chen Zhou
IPC: B23K26/211 , B23K1/00 , B23K1/18 , B23K1/005 , B23K101/32 , B23K103/12
Abstract: A method of forming a weld interface between a first workpiece and a second workpiece includes arranging a reactive braze material at a first joining surface of the first workpiece. The reactive material is selected to react upon being heated to a temperature below the solidus temperature of the first and second workpieces to form a liquid-containing reaction product. Furthermore, an assembly is prepared of the first workpiece and the second workpiece with the first joining surface of the first workpiece and a second joining surface of the second workpiece separated by the reactive material. The second workpiece is then heated with a first laser beam following a first path and with a second laser beam following a second path.
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Patent Agency Ranking
公开(公告)号：US10574122B2
公开(公告)日：2020-02-25
申请号：US15404433
申请日：2017-01-12
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Thomas A. Perry , James G. Schroth , Sean R. Wagner
IPC: H02K15/02 , H02K15/03 , C23C8/26 , C23C8/50 , C23C8/38 , C21D7/06 , C21D9/00 , C21D6/00 , H02K1/27 , C23C8/32
Abstract: A method of forming a rotor includes isolating a bridge area of an electrical steel lamination. The bridge area is disposed between a first portion of the electrical steel lamination and a second portion of the electrical steel lamination that is adjacent to the first portion. Each of the first portion, the second portion, and the bridge area has an initial hardness, and the electrical steel lamination has an initial magnetic permeability. After isolating, the method includes hardening only the bridge area so that the bridge area has a treated hardness that is greater than the initial hardness. Concurrent to hardening, the method includes decreasing the initial magnetic permeability at only the bridge area.
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公开(公告)号：US10240222B2
公开(公告)日：2019-03-26
申请号：US14789260
申请日：2015-07-01
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： James G. Schroth , Thomas A. Perry
IPC: B23K11/11 , C22C9/00 , B23K35/30 , B23K11/16 , B23K11/18 , B23K11/34 , B23K103/04 , B23K103/10
Abstract: A method of joining a first metal workpiece substrate and a second metal workpiece substrate by way of reaction metallurgical joining involves passing a pulsating DC electrical current through the metal workpiece substrates and a reaction material disposed between confronting faying surfaces of the workpiece substrates. The electrical current comprises a plurality of current pulses that generally increase in applied current level.
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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.
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公开(公告)号：US20160218603A1
公开(公告)日：2016-07-28
申请号：US14996549
申请日：2016-01-15
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： James G. Schroth , Thomas A. Perry , John S. Agapiou , Ronald M. Lesperance
CPC classification number: B23K35/222 , B23K1/0016 , B23K1/19 , B23K9/0008 , B23K9/167 , B23K9/23 , B23K2101/32 , B23K2101/36 , B23K2103/12 , H02K3/50 , H02K15/0081
Abstract: An arc welding/brazing process is disclosed that is useful to join together a first copper piece and a second copper piece without damaging more heat-sensitive materials that may be located nearby is disclosed. The arc welding/brazing process includes using a non-consumable electrode wire, which electrically communicates with a weld control in a straight polarity orientation, to strike an arc across a gap established between a leading tip end of the electrode wire and the first copper piece. The current that flows through the arc when the arc is established heats the first copper piece such that the first copper piece becomes joined to a second copper piece. The joint between the first copper piece and the second copper piece may be an autogenous weld joint or a braze joint.
Abstract translation: 公开了一种电弧焊接/钎焊方法，其可用于将第一铜片和第二铜片接合在一起而不损害可能位于附近的更多热敏材料。 电弧焊接/钎焊工艺包括使用与直线极性取向的焊接控制电连通的非消耗性电极线，以跨越在电极线的前端和第一铜片之间建立的间隙 。 当电弧建立时流过电弧的电流加热第一铜片，使得第一铜片接合到第二铜片。 第一铜片和第二铜片之间的接合部可以是自身焊接接头或钎焊接头。
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公开(公告)号：US20160008911A1
公开(公告)日：2016-01-14
申请号：US14789134
申请日：2015-07-01
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： James G. Schroth , Thomas A. Perry , Chen Zhou
CPC classification number: C22C9/00 , B23K9/042 , B23K20/165 , B23K35/302
Abstract: A method of pre-placing a reaction material onto a surface of a metal workpiece substrate involves the use of oscillating wire arc welding. The method involves depositing and adhering the reaction material from a consumable electrode rod. In doing so, the reaction material can be deposited at any time before the metal workpiece substrate is ready for joining by reaction metallurgical joining, and the size and shape of the reaction material deposit can be more easily controlled.
Abstract translation: 将反应材料预放置在金属工件基板的表面上的方法涉及使用振荡焊丝电弧焊接。 该方法包括从可消耗电极棒沉积和粘附反应材料。 在这样做时，反应材料可以在金属工件基片准备好通过反应冶金接合准备接合之前随时沉积，并且可以更容易地控制反应材料沉积物的尺寸和形状。
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