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Multi-impulse welding

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Multi-impulse welding is the making of spot, projection and upset welds by more than one impulse of current. When alternating current is used, each impulse may consist of a fraction of a cycle or a number of cycles.[1]


Multiple-impulse welding can help control the rate of heat in at the interface. For galvanized steels, multiple-impulse welding allows zinc coating on the surface to escape from the interfaces before the nugget is formed.[2]


References

  1. http://www.weldguru.com/welding-terminology.html
  2. http://www.welding-consultant.com/ImpulseWelding.pdf
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