Note: Annealing stainless steel caps (dental)
Objective:
To anneal a variety of part sizes of a common shape in-line (continuously) from a high speed punch press.
End Product:
stainless steel dental crowns
Equipment:
Ambrell 3542LI 3.5 kW induction heating system, equipped with a remote workhead containing two 1.5μF capacitors
An induction heating coil designed and developed specifically for this application.
Materials:
304L stainless steel caps
Temperature:
1600-1800 °F (870-980 °C)
Frequency:
308 kHz
Testing:
A 3-turn coil is used for the heating pattern. Sample cap is placed on a copper tube (slotted to reduce heat-loss) and inserted into a quartz tube which is filled with nitrogen. RF energy is applied for a cycle time of 500 milliseconds. Three S.S. cap sizes (0.295" to 0.397 in OD) Each one of the three cap sizes were heated at two different settings. Requirement to anneal large quantities of work-hardened crowns suggests induction for precise, controllable heating. Since oxidation is unacceptable in the finished product, Induction is the appropriate choice for heating in an inert atmosphere.
Benefits:
Induction heating provides:
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Rapid, repeatable results
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Integration-friendly equipment for high-speed automation
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Operability in an inert atmosphere
Visit our Applications Lab to learn more about free applications testing.
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