T E C N O - S A L D A T U R E | industrial robotic welding

Welding | Resistance Welding

The electric resistance welding (RW Resistance Welding or in the terminology AWS) is an autogenous welding process by pressure in which the heat necessary to bring the surface to be locally resolder temperature forging or casting for electric heating is provided by the passage of a current through the area to join. The welding is performed without filler material. The resistance welding, as compared to arc welding, has the advantage of having less severe thermal cycles, and heat affected zone to have a significantly smaller than that of arc welding. On the other hand, the resistance welding can be performed only on limited thickness (generally less than 3 mm, although with parameters and electrode studied in particular, can reach 6 mm) and very expensive and requires special procedures to provide joint continuous (disc electrode). Using the electrical resistance welding can be achieved both lap joints in which welding is limited to small portions of overlapping surfaces, and butt joints, in which the weld extends to the whole contact surface of the pieces. Resistance welding is used on a wide range of applications on carbon steel, galvanized sheet, stainless steels, aluminum alloys, copper alloys and titanium.

Advantages of Resistance Welding
No need for filler material;

The thermal effect does not alter the content areas adjacent to the welding point;

Suitable for small or large areas can produce overlap and butt joints;