induction hardening the teeth of saw blade


induction hardening the teeth of saw blade with high frequency induction hardening machine


Induction Hardening the teeth of a large saw blade for a hardening surface application; the objective is to reduce the heating time

Material :  Section of the saw blade

Temperature: 1650 ºF (899 ºC)

Frequency: 134 kHz

Equipment :

–DW-UHF-40kW 50-150 kHz induction heating system equipped with a remote workhead containing eight 1.0 μF capacitors

–A multiple position two-turn helical induction heating coil designed and developed specifically for this application

Process: The induction heating coil was developed so that it would not concentrate heat in the outside edge valley of the tooth. The part was placed under the coil approximately 1/8” (3.2 mm) away and the power was turned on. With the 40 kW DW-UHF series induction heating power supply the part heated to temperature within the targeted rate of five teeth per four seconds.

induction hardening machineResults/Benefits

–Speed: The customer was already using induction, but wanted to upgrade to a higher power system to increase
their production rate (Prior to first using induction from HLQ, the client used a torch.)
–Precision and Repeatability: A torch isn’t as precise as induction nor is it repeatable, whereas induction can be
implemented to be highly repeatable
–Efficiency: Induction heating uses less energy than a torch and offers instant on/off heating