The following segments give an overview of the usually applied attachment

technologies for contact parts to carrier components. They include mechanical

as well as brazing and welding methods used for electrical contact assemblies.

Rivet staking and the insertion and forming of wire segments into pre-stamped

carrier parts or strips with punched holes are the most commonly used methods

Fig. 3.7: Direct press-insertion of wire segments

Brazing is a thermal process for the metallurgical bonding of metallic materials in

which a third metal component (brazing alloy or solder) is added. In addition a

described in Chapter 3.4.

The simplest way to produce braze joints is the use of a gas torch fueled by a

burning gas and air or oxygen containing gas mixes. For higher production

contact tip.

Furnace brazing is usually defined as brazing in a protective atmosphere or in

vacuum. Both processes do not require the use of fluxes.

surface layer changes the contact properties of these materials.

In this process the resistive heating under electric currents is the source of

thermal energy. For contact applications two methods are used for resistance

Fig. 3.8: Resistance brazing (schematic)

During induction brazing the heat energy is produced by an induction coil fed by

a medium or high frequency generator. This creates an electromagnetic alternating

manufacturer and the user.

Welding of contact assemblies has both technological and economic

importance. Because of the short heating times during welding the carrier

for medium and high voltage switchgear.

Resistance welding is the process of electrically joining work pieces by creating

the required welding energy through current flow directly through the