What is the reason for the rapid wear of welding electrodes in intermediate frequency spot welding machines?

What are the main reasons for the wear of welding electrodes when using intermediate frequency spot welding machines? There are three reasons for this: 1. The selection of electrode materials; 2. The effect of water cooling; 3. Electrode structure.

1. The selection of electrode material is necessary, and the electrode material needs to be changed according to the different welding products. When spot welding low-carbon steel plates, chromium zirconium copper is used because the softening temperature and conductivity of chromium zirconium copper are relatively moderate, which can meet the welding needs of low-carbon steel; When spot welding stainless steel, beryllium cobalt copper is used, mainly due to its high hardness; When welding galvanized sheet, aluminum oxide dispersed copper should be used, mainly because its aluminum oxide composition is not easy to react with the zinc layer to form adhesion, and the softening temperature and conductivity are relatively high. Dispersed copper is also suitable for welding other materials;

2. It is the effect of water cooling. During welding, the fusion area will conduct a large amount of heat to the electrode. A better water cooling effect can effectively reduce the temperature rise and deformation of the electrode, thereby slowing down the wear of the electrode;

3. It is an electrode structure, and the design of the electrode should maximize the electrode diameter and reduce the electrode extension length while matching the workpiece, which can reduce the temperature rise caused by the heat generated by the electrode’s own resistance.