Hardening of dedicated Driveline Components

Goy Wilfried - EMA-Indutec GmbH (Germany)

The presentation introduces a new generation of machines for DRIVELINE components of cars and trucks, like ball hubs, cv-joints, drive shafts, etc.

The energy sources of these machines are fully digital controlled MF-power supplies with one rectifier bridge, one DC-circuit and up to eight individually working outputs. Frequency of each output can be adapted to suit connected application (medium and/or high frequency).

Because of increasing interest by car manufactures the design of machine and inductor working heads allow working under protection atmosphere to prevent scale. Two solutions can be offered:

  • Totally closed machine with lock transfer systems for work pieces and
  • narrow housings which cover working/heating area only to minimize gas consumption.

 

Hardening:

For this parts the hardening depth is 2-6 mm. Usually the power needed is between 100-500 kW

with a frequency of 10-20 kHz, maximum 200 kHz. Typical hardness patterns are shown.

 

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