Induction Annealing Bolt Shafts With High Frequency Heating Machine

Objective To heat 431 Stainless steel bolts to 1850ºF (1010ºC) and Inconel and 8740 alloy steel bolts to 1000ºF (538ºC) for annealing
Material Various sizes of 431 stainless steel, inconel and 8740 alloy steel bolts
Temperature 1000ºF (538ºC) and 1850ºF (1010ºC)
Frequency 280KHz
Equipment •DW-UHF-4.5kW induction heating system, equipped with a remote workhead containing one 0.66μF capacitor.
• An induction heating coil designed and developed specifically for this application.
Process A three turn helical coil is used to heat the shaft of the bolts for 10 to 12 seconds on the large bolts and 18 to 20 seconds on the smaller bolts using the same coil.
Results/Benefits Induction heating provides:
• Hands-free heating that involves no operator skill for manufacturing
• Flameless process
• Pinpoint accuracy and repeatable cycle after cycle