Note: Hardening Seat Belt Parts
Objective:
Heat the teeth of a soft steel seatbelt retraction gear to 1700°F (926.7ºC) within two seconds for hardening.
End Product:
Steel seatbelt retraction gear
Equipment:
Ambrell 7.5kW induction heating system equipped with a remote workhead with 1.0 µF capacitance An induction heating coil designed and developed specifically for this application.
Materials:
#4130 steel seatbelt retraction gears, water vortex quenching tank, electronically controlled air valves, adjustable timers
Temperature:
1700 °F(926.7ºC)
Frequency:
165 kHz
Testing:
A four-turn helical concentrating coil is specially designed to deliver uniform heat to the steel seatbelt retraction gear. The parts are positioned in the coil above the quenching tank and held in place with a vacuum rosette fixture. Power is applied for two seconds to heat the part. The parts are then expelled into the quench tank for cooling.
Benefits:
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Uniform and repeatable results
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Energy efficient
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Non-contact heating
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