Article
The spatter during spot welding isResistance spot weldingOr when projection welding is heated, the metal at the welded location expands to form liquefied metal and plastic rings. They continue to grow under the influence of temperature, causing the air pressure in the melting zone to continue to increase. The wall thickness of the plastic ring cannot be uniform. When the extrusion force of the air pressure exceeds the resistance of the thinnest wall of the plastic ring, metal liquid will splash from here, causing metal light to fly out. This phenomenon is called welding spatter. When liquid metal is sprayed, a large amount of metal will be taken away from the melted area, causing pits to form in the melted area, which not only affects the appearance but also affects the welding quality.
What causes spatter in spot welding and projection welding?
1. The contact surface of the workpiece 2 at the welding point is uneven 2. There are oxide films and coatings on the surface of the workpiece 3. The electrode is not aligned 4. Poor contact between the electrode and the workpiece. 5. The current rises slowly up and down without any slope control. 6. The welding pressure is not moderate 7. The electrode is not flexible in moving up and down. 8. Poor cooling 9. The welding current is not moderate
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