Spot welding sputtering is generally caused by too much welding current and too low electrode pressure, too much welding current will make the electrode overheating and deformation, and will accelerate the alloying of zinc copper, thereby reducing the electrode life.
At the same time, the research of the factory shows that the form of forging pressure can make the electrode wear around the working face of the electrode, but not in its center for a long time to maintain the original working face size of the electrode, thus improving the service life of the electrode.
When spot welding galvanized steel plate, it should be avoided as far as possible to use single-sided double spot welding, because the partial current in this case is large, and when the molten core of the same size is obtained, the total current flowing through the electrode is large, and the plate heating on one side of the electrode is more serious, which is easy to overheat the electrode and reduce the service life.
When the workpiece structure is limited, double-sided double spot welding can be used instead of single-sided double spot welding. In addition, in the case of pre-processing conditions and joint form allow, try to use convex welding instead of spot welding galvanized steel plate, which can solve the electrode adhesion problem, but also to ensure the strength of the joint.
Galvanized steel plate spot welding Precautions Compared with low carbon steel plate, galvanized steel plate spot welding welding current, welding time generally need to be increased by 25% to 50%, electrode pressure need to be increased by 10% to 25%, continuous spot welding, also need to use increasing current.
Post time: Dec-08-2023