The photo shows our induction hardening machine for
construction machinery slew bearings.
The section hardened is the inner gear inside the ring.

This machine can treat parts up to 1300mm in diameter and
over 250kg in weight.

To provide the large energy required for heating, this machine is equipped
with a 1100kW, 10kHz converter.

While induction hardening of large gears can cause cracking and runout,
our machine achieves an even casing by heating the workpiece in two stages,
preheating and main heating, and quenching using our dip-spray method.

In the photo, the octagonal-shaped pool to the left is the dip spray tank.
The workpiece is sitting on the receive jig and diagonally above it is the coil.

During loading/unloading, the coil moves to the right, and during hardening
it moves directly above the workpiece.

Dip quenching requires a high volume of quenching water.
This machine utilizes a magnet separator and oil skimmer to remove impurities
and the quenching water is recycled into the tank.

The machine design was kept as compact as possible despite
treating extremely large workpieces.