Note: Brazing a brass screw cap and a steel tube

Objective:

To heat a brass hex screw cap and a steel tube

End Product:

Brass steel assembly

Equipment:

Ambrell EKOHEAT 15 kW, 50 to 150 kHz induction heating system equipped with a remote workhead containing four 1.5 uf capacitors for a total of 1.5 uf A four-position, two-turn helical induction heating coil designed and developed specifically for this application 

Materials:

Screw cap Steel tube Braze rings Flux 

Temperature:

1400 °F (760 °C)

Frequency:

109 kHz

Testing:

White brazing flux was used on the parts. Samples were assembled using the braze rings, a batch of four samples were heated for 60 seconds, the braze flowed, and an aesthetically pleasing joint was created. The process met the client in ™s time objective of 15 seconds per part. A faster heating time is not recommended due to the limitations of thermal conduction of brass to the center of the part

Benefits:

  • Speed: Induction enabled the brazing process to be completed at a rate of 15 seconds per part

  • Consistency: Induction enables consistent joint quality, which a torch often doesn"t deliver

  • Safety: There is no open flame with induction, so it"s a safer heating option than other options such as torch heating

  • Efficiency: Induction delivers heat only where it"s required, making it more efficient than many competitive heating methods 

Brazing a brass screw cap and a steel tube

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