Induction Spring Heating Application

An apparatus for Induction hardening a spring having a helical or beehive shape. The apparatus has a rotation support system and an induction heating system. The rotation support system is designed to support the spring while the spring is heated by the induction heating system. The induction heating system has an induction coil system having … Read more

Induction Tempering Spring

Induction Tempering Spring with High Frequency Induction Heating Equipment

Objective Temper a spring by heating it to 300°C (570°F) in 2 – 4 seconds
Material Stainless steel AISI 302 springs- different length from 60 to
110 mm – outer diameters 8 mm.- wire diameter from 0.3 to 0.6 mm
Temperature 300°C (570°F)
Frequency 326 kHz
Equipment • DW-UHF-10kW induction heating system
• remote workhead, two 0.33μF capacitors (total 0.66μF)
• multi-turn C-channel coil developed for this application
Process Springs are mounted on non-metallic mandrels to facilitate loading and unloading and are placed inside the coil (picture). Power is applied for 2 – 4 seconds, completing the tempering process. The C-channel distributes the heating evenly and 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