The Study on the Ineffective Mechanism of Aluminum Alloy Spot Welding Electrode

Abstract:

This study explored the electrode excessive burning reason caused by aluminum resistance spot welding and proposed a new electrode failure mechanism. The test shows that the oxide film of aluminum alloy workpieces causes the contact of non-uniform points between electrode and workpieces and instantaneously leads to a local explosion when setting up an electric circuit, bringing about the plastic deformation of the electrode surface in the local area, which will in turn exacerbate the contact of non-uniform points between electrode and workpieces so as to result in the serious burnout of electrodes under the interaction between local explosions and Cu-Al alloying. Cu-Al alloying and brittle material on the electrode surface caused by the contact of non-uniform points will firstly detach from the surface of electrode under the tearing force of mechanical , so that the electrode surface becomes more uneven.

• Periodical: Key Engineering Materials (Volumes 531-532)
• Pages: 84-87
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.531-532.84
• Online since: December 2012
• Authors: Hui Yong Yu, Hui Lin Zhou, Dan Liu, Jun Hua Hu
• Keywords: Aluminum Alloy Spot Welding Electrode, Contact of Non-Uniform Point, Ineffective Mechanism

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