Induction Brazing Copper Assembly With High Frequency Heating Equipment
Objective Brazing a copper pivot assembly
Material Two copper uprights 2โ (5cm) wide x 4โ (10.2cm) high, copperย base 3โ (7.6cm) x 2โ (5cm) and .5โ (1.3mm) thick with 2ย channels for the uprights to the slide into, braze shims andย black flux
Temperature 1350 ยบF (732 ยบC)
Frequency 200 kHz
Equipment โขDW-UHF-20kW induction heating system, equipped with aย remote workhead containing two 1.0ฮผF capacitors for aย total of 0.5ฮผF
โข An induction heating coil designed and developedย specifically for this application.
Process A three turn helical coil is used to heat the base of theย assembly. The copper uprights and two braze shims areย placed in the grooves in the base and black flux is applied. Theย assembly is placed in the coil and power is applied for 4ย minutes to braze both the uprights in place.
Results/Benefits Induction heating provides:
โข Rapid localized heat which can minimize oxidation andย reduce cleaning after joining
โข Consistent and repeatable joints
โข Hands-free heating that involves no operator skill forย manufacturing
โข Even distribution of heating