Maschinenfabrik ALFING KESSLER GmbH

View of the workspace of the ALFING laboratory machine.

Fatigue and component testing

Inductors are at the heart of every hardening system. The development and construction of inductors is our core competence. The inductor specifications depend on the system design, crankshaft geometry, material and customer requirements.

They can be manufactured as half-shell or ring inductors for various special forms and free-form models as well as all radii and diameters. Even prior to the construction of the hardening machine, we are able to test the inductor performance, configure the technical parameters and optimise the process in our laboratory. We can subject crankshaft prototypes to test hardening on our laboratory hardening machines and we are also able to test the service life of pre-series engines. Using test benches that we have developed in-house, we are able to precisely determine the bending and torsion endurance fatigue strength of hardened crankshafts. This enables us to optimise crankshafts for use.

Optimising of the hardening processes for prototypes on our laboratory machine.

Simulation of temperature distribution during quenching in order to record the quenching sequence. Our experts use the thermal imaging camera and the graphic evaluation to identify the potential for improvements.

The cross-section is used to determine the hardening sequence in the edge zones. Here, the crankshaft bearing journals are hardened in order to increase the stiffness and endurance strength of the crankshaft. To promote crankshaft development, tests can be run on our laboratory machine and adjustments can then be made to the design at an early stage.

Test bench for testing the bending and torsion
endurance fatigue strength of a crankshaft subjected to test hardening.

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