Induction Heat Settingย A Shape Memory Alloy With IGBT Induction Heater
Objective Heat a steel die to 975ยฐF (523.8ยบC) to set (cure) a shapeย memory alloy in the correct position.
Material Nitinol wire, 2โ (50.8mm) diameter tapered steel die, steel tubeย to house the die, instant adhesive
Temperature 975ยฐF(523.8ยบC)
Frequency 131kHz
Equipment โข DW-UHF-6kW induction heating system equipped with aย remote workhead containing one 1.0 ฮผF capacitor
โข An induction heating coil designed and developedย specifically for this application.
Process A five turn helical coil is used to heat the steel die. The Nitinolย wire is set into the die and tacked into place using instantย adhesive. The die is placed inside a larger steel tube. The dieย cure is heated to 945ยบF (507.2ยบC) in 75 seconds. Successfulย heat setting of the Nitinol wire is achieved in 15 seconds.
Results/Benefits Induction heating provides:
โข Fast, accurate, repeatable heating
โข Heat precisely delivered only to where it is needed
