Induction Shrink Fitting Assemble Connecting Rods With IGBT Heating Units
Objective Assemble connecting rods with a more accurate control of theĀ heat
Material Rod has an OD of .9125ā (23.18mm), knuckle has an ID ofĀ .9125ā (23.18mm) with an interference of .0001ā (.0025mm).Ā Knuckle assembly is forged steel
Temperature 400 ĀŗF (204 ĀŗC)
Frequency 210 kHz
Equipment ā¢ DW-UHF-Ā 3.5 kW induction heating system, equipped with aĀ remote workhead containing two 1.0Ī¼F capacitors for aĀ total of 0.5 Ī¼F
ā¢ An induction heating coil, designed and developedĀ specifically for this application.
Process A six turn helical coil is used to heat the connecting rod for 13Ā seconds. The coil is perpendicular to the axis of the bore toĀ promote even heating around the circumference. TheĀ connecting rod is then assembled with the piston for shrinkĀ fitting.
Results/Benefits Induction heating provides:
ā¢ More accurate control of heat vs a flame burner. Only heatsĀ knuckle, not the whole part.
ā¢ Lower temperature used to prevent discoloring.
ā¢ Increased productivity due to repeatability & ease ofĀ operation. A foot pedal & timer is used.
ā¢ No product contamination.
