The electrode-negative arc welding process for thin-gage steel plates described in this paper has been developed to meet the demands of limit design to reduce the car body weight. Generally, electrode-positive arc welding is employed to joint thin-gage steel plates. However, it is difficult to produce a continuous bead when plates are less than 1 mm in thickness or when the gap between stamped parts at the joint is rather wide, because in these cases arc welding produces holes, burn-through bead or separated beads. To solve this problem, much attention has been focused on the fact that electrode-negative arc welding produces more molten metal for welding and less heat input into the base metal than the electro-positive method. The electrode-negative arc welding method has been studied by controlling the current curve affected by the short circuits of droplets and the base metal, making the transferring droplets small and then stabilizing arcing. Further, the welding wire with the most suitable chemical composition has been developed. This new technique has expanded the range of welding conditions for arc welding applied to thin steel body parts, and has made it possible to reudce the car body weight.
New techniques for electrode-negative shielded gas arc welding process for thin-gage steel plates in automobile body production
Neue Verfahren fuer das Schutzgasschweissen mit Elektrode am Minuspol von Duennblech bei der Herstellung von Fahrzeugkarosserien
JSAE Review ; 12 , Nov ; 101-109
1983
9 Seiten, 13 Bilder, 1 Tabelle
Article (Journal)
English
Automotive engineering | 1983
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|Production welding in the all-steel automobile body industry
Engineering Index Backfile | 1928
|Production welding in the all-steel automobile body industry
Engineering Index Backfile | 1928
|