The parts need to be designed with a slightly overlap. If one part has a machined phase, the parts show a self-centering behavior once the pre-load is applied. During the discharge of the electrical energy the joining procedure is the same as seen by CD-welding with a weld projection. The joining is formed at the lateral surface of the parts and can reach a length of up to 3 mm.
For CD welding it is important that the machine technology enables a fast follow up of the electrodes. This is achieved through the design of the follow up unit, whereby a sufficient spring travel with minimal force drop must be ensured. Otherwise there may be insufficient welding with reduced weld quality.