When the welding current is higher, so will be the electrode pressure. The two parameters are adapted to the criterion of not producing spatter as a critical condition, and the critical area varies from different types of soft and hard criteria. Generally, electrodes are subjected to tens or even thousands of Newtons of pressure during welding.
Electrode pressure is also one of the important parameters for spot welding. Too much or too little electrode pressure will reduce the load-bearing capacity of the welded joint and increase dispersion, especially for tensile loads.
When the electrode pressure is too high, the plasticity of the metal in the weld zone is lower and the dispersion is greater, especially for tensile loads. When the electrode pressure is too small, the heating rate is greater than the expansion rate of the plastic ring due to insufficient range and degree of plastic deformation of the metal in the weld zone, resulting in severe spattering, Which must be avoided due to the detrimental effects on the molten core's shape and size, environmental pollution, and safety concerns.
When the electrode pressure increases, there is greater contact area in the welding zone, leading to decreased total resistance and current density. This results in increased heat dissipation in the welding zone and a reduction in the size of the molten core, which can causes unwelded defect in severe cases.
When the electrode pressure increases, there is greater contact area in the welding zone, leading to decreased total resistance and current density. This results in increased heat dissipation in the welding zone and a reduction in the size of the molten core, which can causes unwelded defect in severe cases.
