Induction Tempering Spring with High Frequency Induction Heating Equipment
Objective Temper a spring by heating it to 300ยฐC (570ยฐF) in 2 โ 4ย seconds
Material Stainless steel AISI 302 springs- different length from 60 to
110 mm – outer diameters 8 mm.- wire diameter from 0.3 to 0.6ย mm
Temperature 300ยฐC (570ยฐF)
Frequency 326 kHz
Equipment โข DW-UHF-10kW induction heating system
โข remote workhead, two 0.33ฮผF capacitors (total 0.66ฮผF)
โข multi-turn C-channel coil developed for this application
Process Springs are mounted on non-metallic mandrels to facilitateย loading and unloading and are placed inside the coil (picture).ย Power is applied for 2 โ 4 seconds, completing the temperingย process. The C-channel distributes the heating evenly andย enables the convenient staging and removal of the springs.
Results/Benefits Efficiency: Energy is applied directly to the springs only;surrounding air and fixturing are not heated.
Precision: temperature and duration of process are controlled
Convenience: method integrates into a continuous process