Soldering Co-axial Wire Assemblies

Objective

To solder center-conductor and shielding braid of wire assemblies to 500 (250) °F(°C).

End Product

coaxial cable

Equipment

Ambrell 2 kW induction heating system, equipped with a remote heat station containing two 0.33 μF capacitors.

An induction heating coil designed and developed specifically for this application.

Materials

Customer-supplied assemblies, temperature indicating paint, flux-cored solder wire

Temperature

500*F (260*C)

Frequency

272 kHz

Testing

A multi-turn helical coil is used and temperature-indicating paint is applied to the joint area. The wire assembly is placed over the induction heating coil, and RF power is applied. The time-to-temperature and the heating pattern on the part are established. The next wire assembly is placed on the coil, the assembly is heated and solder wire is fed into the joint.

The assembly heats well and reaches 500 °F in 10 seconds

Benefits

• elimination of a crimp process

• more reliable connections are made

• faster process times

Image