Induction Brazing Copper Fittings
Objective: Copper ‘tees’ and ‘ells’ are to be brazed to the aluminum body of a refrigeration valve
Material: customer’s valve copper fittings braze
Temperature: 2550 ยบF (1400ยฐC)
Frequency: 585 kHz
Equipment:ย DW-UHF-10kw induction heating systemย including a workhead containing two 1.5ฮผF capacitors (total 0.75ฮผF) and a three-turn helical coil
Process: The valve is placed inside the coil andย RF induction heating powerย is applied until the part is heated to the required temperature and the braze is seen to flow into the joint. Two tube sizes were run using the sameย induction heating system settings with differing cycle times.
Results/Benefits โข energy is applied only to the zone to be heated โข heating of the joint/braze is uniform and repeatable