Patent
Resistance welding method
TLDR
In this article, a resistance welding method is described, including the steps of contacting electrodes to two parts to be welded together, faying the two parts at a location, and passing electrical current between the electrodes and through said location, wherein the improvement comprises, on the parts, a roughened surface means for decreasing heat generation where an electrode makes contact and at the faying location, the coating means performing the function of generating heat to form a nugget without expulsion.Abstract:
A resistance welding method, including the steps of contacting electrodes to two parts to be welded together, faying the two parts at a location to be welded, and passing electrical current between the electrodes and through said location, wherein the improvement comprises, on the parts, a roughened surface means for decreasing heat generation where an electrode makes contact and a uniform coating means at the faying location, the coating means performing the function of generating heat to form a nugget without expulsion.read more
Citations
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Pei-Chung Wang,Peter C. Sun +1 more
TL;DR: In this article, a method for repairing resistance spot welds formed between joined pieces of aluminum alloy sheet metal, such as vehicle body parts, is described, where an existing undersized spot weld is enlarged by applying electric current flow through the aluminum alloy sheets in the region around the existing defective weld.
References
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Patent
Resistance welding apparatus and method
TL;DR: In this article, adjustable supports for arranging the work-contacting electrodes in spaced proximity to the work, and circuitry for inducing an inert gas shielded arc of alternating current across each electrode and the work are presented.
Patent
Metal pretreatment for resistance spot welding of aluminum
TL;DR: In this paper, a process for preparing aluminum sheet for resistance welding is described, which increases the useful life of the welding electrodes used for welding the thus prepared sheet, thereby creating a differential in oxide thickness between the surfaces of the sheet.
Patent
Method of resistance welding
TL;DR: In this article, the surface of high strength low alloy steel material is treated to form a high resistance coating on its surface and when resistance welding the material the coating permits weld formation without significant expulsion or excessive electrode force over a wide range of operating conditions.