Rotationally symmetrical components - primarily gears for powertrain transmissions, but also transmission parts for applications in industry, aviation and agriculture - can be hardened particularly efficiently and precisely using this process.
The components, previously heated to hardening temperature, are fixed in the tool using specially adapted inserts. This ensures that axial run-out and concentricity are maintained throughout the quenching process.
An internal mandrel also causes targeted shrinkage in the inner diameter. This enables the production of a precisely defined inner diameter and high cylindricity - without subsequent cost-intensive hard machining.
In the case of mandrels, an additional difference can be made between a fixed mandrel, i.e. a cylinder precisely ground to the outside diameter, which can also be designed with teeth if required.
The expanding mandrel, on the other hand, uses several segments that, using an expanding cone that moves on a block, move the coordinated segments to a defined diameter and hold them in this position with hydraulic pressure during the shrinking of the component.
We offer customized hardening systems based on furnace throughput, component sizes, or geometric tolerance requirements, taking customer requirements into account to ensure that the end result is a tailor-made, cost-efficient system.
We use a modular concept for this: