Resistance spot welding

Resistance spot welding is a method that uses heat from electrical resistance (Joule heat). This page introduces the fields in which resistance spot welding is used and the related welding methods.

Weld materials are held together from above and below with copper electrodes for energization connected to the welding power supply. When a current passes through the section to be welded, the heat generated by electrical resistance (Joule heat) melts and joins the materials. In FA (factory automation), automatic resistant spot welding machines have been used widely in joining processes on manufacturing lines.
Seam welding, which uses a series of overlapping weld spots, and projection welding, which causes concentrated resistance heat on projections created on the joining surface of one material, are variations of resistant spot welding.

Resistance spot welding
  1. Pressure force
  2. Flow of electric current
  3. Electrodes
  4. Weld materials