Welding electrode for use in resistance spot welding workpiece stack-ups that include aluminum workpiece and steel workpiece

A technology for welding electrodes and workpieces, which is applied in the direction of resistance welding equipment, cooling electrodes, welding equipment, etc., and can solve the problems of high consumption cost and long time
CN106853548AInactive Publication Date: 2017-06-16GM GLOBAL TECH OPERATIONS LLC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GM GLOBAL TECH OPERATIONS LLC
Publication Date
2017-06-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

A welding electrode suitable for resistance spot welding applications includes a first portion, a second portion, and a reduced diameter portion that extends between and connects the first and second portions. The first portion includes a weld face and the second portion includes a mounting base that opens to an internal recess having a cooling pocket. The reduced diameter portion extends between a back surface of the first portion and a front surface of the second portion such that a gap separates the back and front surfaces from each other. The gap may be vacant or filled with a low conductivity material. The disclosed welding electrode may be used in conjunction with another welding electrode to resistance spot weld a workpiece stack-up that includes an aluminum workpiece and an adjacent overlapping steel workpiece.
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Description

technical field

[0001] The technical field of the invention relates generally to resistance spot welding and, more particularly, to resistance spot welding of aluminum workpieces and adjacent overlapping steel workpieces. Background technique

[0002] Resistance spot welding is a process used by many industries to join two or more metal workpieces together. For example, the automotive industry commonly uses resistance spot welding to join metal workpieces in the manufacture of doors, hoods, deck lids, liftgates and / or body structures such as body sides and cross members. A number of solder joints are usually formed at various points around the edge of the metal workpiece or around some other bonded area to ensure that the part is structurally sound. Although spot welding is commonly used to join together certain metal workpieces of similar composition (such as steel-steel and aluminum-aluminum), the need to incorporate lighter weight materials into body structures has led t...

Claims

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