Percussion welding

From GAWDAwiki

Percussion, or percussive, welding is a form of resistance welding in which coalescence of abutting metal pieces results from the heat of an arc produced when electrical energy is rapidly discharged. Pressure is applied progressively during or immediately following this discharge.

Percussion Welding vs. Flash Welding

Percussion welding is similar to flash welding and upset welding in many ways, but it is generally considered more complex than these processes due to its use of an arc, which is produced at the abutting surfaces when stored electrical energy is rapidly discharged across a quickly shrinking air gap.

Benefits and Limitations

Percussion welding features a very shallow depth of heating and a very short time cycle. However, it is generally restricted to use on metals with similar geometry and cross sections (which must be fairly small).^[1]