Brazing Copper Bars with Induction
Objective: To braze bus bar assemblies together
Material: • 2 copper bus bars 6″ (152.4mm) wide, 2′ (609.6mm)long, 2
copper bars 6″(152.4mm) wide, 18″ (457.2)long & 3/8″ (9.65mm) thick • braze shim preforms and white flux
Temperature: 1292 ºF (700 ºC)
Frequency: 80 kHz
Equipment • DW-UHF-60KW induction heating system, equipped with a
remote workhead containing eight 1.0 μF capacitors for a total of 2.0 μF.
• An induction heating coil, designed and developed specifically for this application
Process: A three-turn helical coil is used to heat the assembly. Three braze shim preforms are placed between the plates and white flux is applied to the assembly. It is heated for 5 minutes to evenly flow the braze alloy. A high current capable, aesthetic looking braze zone is produced.
Results/Benefits Induction heating provides:
• Consistently produced, quality parts
• Heat into the part that is divided equally between the copper pieces, allowing for even flow and consistent use of braze
• Hands-free operation that doesn’t require skilled operators