Investigation on Welding Process and Welding Parameters in Resistance Spot Welding Process with High-Current Density and Short Current Duration

概要

論文の詳細を見る
In the resistance spot welding process with high-current density and short current duration, the fusion layer at the interface of the welded joints is much thinner than the one in the conventional spot welding process and the strength of the joints is sufficiently high, and then, its indentation is very small. As this welding process utilizes the contact resistance at the interface efficiently to form the nugget, the current path is a main factor to determine the welding area. The current path mainly depends on the electrode diameter, sheet thickness, electrode force, and current value. For obtaining the welded joints with sufficiently high strength, the current density in the current path among sheets must be larger than a certain value (2.0 kA/mm^2). Furthermore, if the current density at the current path between electrode and sheet is larger than a certain value (2.4 kA/mm^2), the electrode sticks to the sheet. Thus, for obtaining satisfactory welded joints with sufficiently high strength and without the electrode sticking to the sheet surface, the proper welding conditions exist under a certain range of sheet thicknesses and electrode tip diameters for welding.
社団法人溶接学会の論文
1986-10-01