The mechanical stiffness of the mid-frequency spot welder has a direct impact on the electrode force, which in turn affects the welding process. Therefore, it is natural to link the spot welder stiffness with the solder joint formation process.
The actual electrode pressure during welding can be significantly different between spot welders of different stiffnesses. This difference may affect the welding process in terms of the occurrence of spatter and the forging of the weld nugget (nugget structure), which can be delayed by increasing the stiffness of the welder.
After testing, after modifying the mechanical structure of an upper and lower welding machine to increase its stiffness, the welding spatter limit (spatter current) of the welding machine also increased. This is because the high-rigidity frame exerts a large binding force on the workpiece, hindering the occurrence of spatter.
This increasing effect of spatter limit is more obvious in thin plate welding, the increase of spatter limit (that is, the increase of spatter current). Since the high spatter limit allows the use of high welding currents, larger welds can be obtained without spatter.
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Post time: Feb-22-2024
