Note: Brazing a Steel Tube with External Wire Braid

Objective:

Heat a magnetic steel tube and external steel wire braid for a brazing application

End Product:

External Wire Braid on Tube

Equipment:

Ambrell EASYHEAT 2 kW, 150-400 kHz induction heating system with a workhead and coil specifically designed for this application

Materials:

Magnetic steel tube (7/8 in /22 mm OD), steel wire braid and braze shim material

Temperature:

1400 °F (760 °C)

Frequency:

296 kHz

Testing:

A specially-designed single-position, three-turn coil was used for this application. Initial tests were conducted to optimize the power delivered to the part. The coil selected is not only capable of heating the 7/8 in /22 mm tube, but also a smaller tube that the client needs to heat. Testing concluded that the EASYHEAT can heat the part to 1400 °F (760 °C) within 20 seconds.

Benefits:

  • Speed: The client requested a system that would meet their time objectives which the 2 kW EASYHEAT easily did, boosting the client"s throughput

  • Footprint: An EASYHEAT and a workhead requires a minimal footprint, saving the client floor space compared to heating alternatives

  • Integration: The compact EASYHEAT can be easily integrated into the client"s manufacturing process

Brazing a Steel Tube with External Wire Braid

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