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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
IPC分类号： B23K11/20 , B23K11/11 , B23K103/20
CPC分类号： B23K11/20 , B23K11/115 , B23K2103/20
摘要： 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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公开(公告)号：US09925617B2
公开(公告)日：2018-03-27
申请号：US13953017
申请日：2013-07-29
CPC分类号： B23K11/3063 , B23K11/115 , B23K11/3009 , B23K35/0205
摘要： Spot welding electrodes with generally dome shaped welding faces are provided with surface features for welding both aluminum alloy sheet assemblies and steel sheet assemblies. A raised circular plateau is formed on the central axis of the dome and, in one embodiment, a suitable number of round bumps are formed in concentric spacing from adjacent the circumference of the plateau toward the circular edge of the welding face. For welding steel workpieces the plateau mainly serves as the engaging feature of the electrode. Both the plateau and concentric bumps are used in penetrating light metal surfaces for suitable current passage. In another embodiment, the domed surface is shaped with concentric terraces for engagement with the workpieces.
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公开(公告)号：US20170225263A1
公开(公告)日：2017-08-10
申请号：US15418771
申请日：2017-01-29
CPC分类号： B23K11/3063 , B23B5/166 , B23K11/20
摘要： 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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公开(公告)号：US09682439B2
公开(公告)日：2017-06-20
申请号：US13777345
申请日：2013-02-26
CPC分类号： B23K11/3009 , B23B5/166 , B23K11/14 , B23K11/3063 , B23K35/0205 , Y10T82/16442 , Y10T83/9372 , Y10T407/19
摘要： 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.
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45.发明申请公开(公告)号：US20170106466A1
公开(公告)日：2017-04-20
申请号：US14883249
申请日：2015-10-14
CPC分类号： B23K11/20 , B23K11/115 , B23K11/185 , B23K11/24 , B23K2103/20
摘要： 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.
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46.发明申请RESISTIVE WELDING ELECTRODE AND METHOD FOR SPOT WELDING STEEL AND ALUMINUM ALLOY WORKPIECES WITH THE RESISTIVE WELDING ELECTRODE 审中-公开电阻焊接电极和方法焊接电极和铝合金工件与电阻焊接电极公开(公告)号：US20160279732A1
公开(公告)日：2016-09-29
申请号：US15074690
申请日：2016-03-18
CPC分类号： B23K11/3009 , B23K11/20 , B23K35/0205 , B23K35/32 , B23K2103/20
摘要： 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.
摘要翻译： 电阻焊接电极至少包括由耐火材料构成的焊接面，其表现出小于或等于国际退火铜标准（IACS）定义的商业纯退火铜的电导率的65％的电导率 ）。 还公开了一种使用电阻焊接电极对包含铝合金工件和钢制工件的工件叠层进行电阻点焊的方法，该铝合金工件和钢工件在接合界面处彼此重叠和接触。
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公开(公告)号：US09440305B2
公开(公告)日：2016-09-13
申请号：US13783343
申请日：2013-03-03
CPC分类号： B23K11/3063 , B23B5/166 , B23K11/11 , B23K11/115 , B23K35/222 , B23K35/302 , B23K2103/10
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US20150231729A1
公开(公告)日：2015-08-20
申请号：US14181020
申请日：2014-02-14
CPC分类号： B23K11/20 , B23K11/115 , B23K11/3009 , B23K11/3018 , B23K35/0205 , B23K35/0261 , B23K2103/20
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US11590601B2
公开(公告)日：2023-02-28
申请号：US16576938
申请日：2019-09-20
摘要： A method of joining a multiple member work-piece includes providing a first steel work-piece having a first thickness and a second steel work-piece having a second thickness. The first thickness is at least twice the second thickness. A third material is disposed in contact with the second steel work-piece. For example, the third material may be in the form of a rivet, a plurality of pins, or a coating material. The method includes resistance welding the first and second work-pieces together. A bonded assembly includes the first and second steel members and the third material being bonded together, where the thickness of the first member is at least twice the thickness of the second member.
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公开(公告)号：US11383319B2
公开(公告)日：2022-07-12
申请号：US16561305
申请日：2019-09-05
摘要： A method of joining a multiple member work-piece includes providing a first steel work-piece having a first electrical resistivity and a second steel work-piece having a second electrical resistivity that is lower than the first electrical resistivity. A third material is disposed in contact with the second steel work-piece. The third material has an electrical resistivity that is greater than the second electrical resistivity. The method includes resistance welding the first and second work-pieces together. The third material may be in the form of a rivet, a third work-piece, or a coating material disposed between the first and second work-pieces. A bonded assembly includes steel members and a third material being bonded together, wherein the electrical resistivity of the second member is lower than the electrical resistivity of the first member, and the third material has an electrical resistivity that is greater than the electrical resistivity of the second member.
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