焊接电极 are installed in the weld head to touch and maintain contact with the workpieces through the full weld schedule. The welding electrodes play three different roles in resistance welding:
Electrodes are available in many shapes. Electrode material and shape are determined by considering the force necessary for welding and the thermal conductivity of the workpieces.
In conventional macro-welding, e.g. car body assembly, the electrodes are made of copper alloys and usually water-cooled. However, in micro-welding, the electrodes are made of a wide variety of conductive and refractory materials depending on the parts to be joined, and are air-cooled.
另请参阅： RWMA 11, RWMA 13, RWM14, RWMA 2, RWMA 3