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:
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Direct, precise heating: Only heats the target portion
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Repeatability: The client was using a torch; induction offers repeatability superior to that of torch heating
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Fast heating: Significantly faster than other techniques such as torch and oven heating
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Clean and flameless, which makes it safer and more repeatable

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