There are currently 16 triple-composite rivet machines, designed with five different models, which can meet the production of contacts of different specifications, and can ensure a reasonable distribution of silver alloy layers and excellent bonding strength.

At the same time, according to the different forming methods, it is divided into: ①: 2 wires do not cut loops; ②: 2 wires do not cut loops; ③: 3 wires do not cut loops; ④: 3 wires do not cut loops.