With most applications in electrical engineering are bimetallic contact rivets (dual-layer and three-layer rivets) that are designed for electrical appliances with low voltage and current to 16 A – contactors, circuit breakers, relays, buttons, switches, electrical switches for bits , blocking keys, etc.
Production of bimetallic contact rivets takes place on specialized rivet machines from the German company “Renz-Wacker”. The process of butt welding of wires appropriate size of the contact and bearing metal and the subsequent formation of the bimetallic rivet through the fray to a certain form. For contact material most commonly is used silver with a purity of 99.95% and a carrier material – electrolytic copper.
The technology for the production of bimetallic rivets is without waste.
Produces three-layer contact rivets, as part of the tail of nits, a second-contacting head. The usage in electric-producing dual-layer and three-layer contact rivets leads to savings in the contact material (usually silver or its alloys).
Highly efficient technology enables adhesion between layers 98 and 100%, hardness of the contact material Hv 70-110 MN / m² and high flatness contact material.