Projection welding spot welding deformation is usually one of the two boards out of the bump, and then welding. Overcome the spot nugget offset the shortcomings of the current focus, therefore, projection welding, the thickness of the workpiece can be more than 6:1. Projection welding, the electrode must be with the bumps are pressure fed rapidly decreased, otherwise it will splash due to loss of pressure, it should be convex welder electrode with good mobility. Multi-point projection welding, the Nickel Welding Electrodes is inappropriate, will cause the bump shift phenomenon and lead to lower joint strength. Experiments show that the shift is caused by the current through the electromagnetic force. The actual welding, because the bump is highly inconsistent, the parallelism of upper and lower electrodes, a bit fixed-point move than two moving. In order to prevent bump shift, in addition to conditions to ensure the normal nugget, use a larger electrode pressure, smaller welding current, should also be possible to improve the pressurized system with the mobility. Improve is to reduce the pressure system with the mobility movable part of quality-oriented part of the rolling friction. Welding Electrodes Manufacturer, in order to overcome the pressure between the bump is not balanced, with additional warm-up pulse or rotating electrode approach. Second, the projection welding process parameters