Induction Shrink Fitting Assemblies
Objective To use induction to prepare cast iron assemblies for shrink fitย assembly
Material Customer supplied cast iron rocker arms of varying sizes
Temperature 450 ยบF (232 ยฐC)
Process Time 20 seconds
Frequency 148 kHz
Equipment DW-UHF-5.0 kW, 150-400 kHz solid state induction heatingย system, equipped with a remote heat station containing oneย 1.0ฮผF capacitor
An induction heating coil designed and developed specificallyย for this application.
Process A four-turn helical coil heats the ring at one end of theย assembly. The coil is designed to concentrate the field towardsย the center of the assembly where the thermal mass is greatest.
Across the heated ring, the coil presents a lighter field.ย After heating, a pin is place within the ring and the assembly isย water quenched.
The heat time varies from part to part but is less than 20ย seconds.
Results/Benefits Induction heating satisfies the needs of this process for:
โข rapid part heating
โข flexibility for parts of differing geometries
โข individual, series part heating, suitable for automation
โข a clean source of heat
โข even heat distribution
