Note: Tempering an audio speaker screen

Objective:

To heat an audio speaker screen to 1100 °F (593 °C) for tempering

End Product:

Audio speaker

Equipment:

Ambrell EASYHEAT 2 kW, 150-400 kHz induction heating power supply with a remote workhead containing two 0.33 μF capacitors for a total of 0.66 μF.
A single-position four-turn helical induction heating coil designed and developed for this application 

Materials:

Speaker screen 

Temperature:

1100 °F (593 °C)

Frequency:

263 kHz

Testing:

The speaker screen was placed over the induction coil and the power was turned on. The screen heated to the desired temperature within just one second

Benefits:

  • Direct, precise heating: Only heats the target portion

  • Repeatability: The client was using a torch; induction offers repeatability superior to that of torch heating

  • Fast heating: Significantly faster than other techniques such as torch and oven heating

  • Clean and flameless, which makes it safer and more repeatable

Tempering an audio speaker screen

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