The photo shows an automobile engine crankshaft induction
hardening machine.

This machine is designed for fillet hardening of pins and journals of
compact, lightweight crankshafts.

This machine is installed in an engine production line,
where it receives the workpiece from the previous process,
and automatically sends it to the next process after hardening.

The workpiece is loaded from the left, then the pins are hardened
at the left hand station.
The journals are then hardened at the righthand station,
before the workpiece is unloaded to the right.

This machine is specified for compactness and short cycle time
(under 60 sec/pc).

This was achieved by designing and manufacturing coils to control
the high power at the fillet corners using the Elotherm method.

☆ In the Elotherm method, semi-open coils track the rotating workpieces,
achieving low distortion and even casing.