Due to the expansion of its industrial use the application of induction hardening has increased. The main application of surface induction hardening especially in the automotive industry is limited to certain component boxes / groups with predominantly even and lightly curved surfaces. This paper presents a newly developed hardening method, engineered by eldec Schwenk Induction GmbH which overcomes the problem of surface induction hardening uneven surfaces, as seen in gear wheels, in a contour true manner. Trying to combine two separate frequencies with their individual power densities and transferring their energy onto one inductor is only possible when two resonant/oscillating circuits (HF and MF) are being fed by one current supply, and their output is superimposed and delivered to one power output. This means, that both frequency/power portions of the output can act on the workpiece simultaneously over one inductor. The MF and HF converter consist of standard IGBTs. In order to achieve a contour true hardening profile along the tooth without effecting the core, very short heating times are necessary. The output power ratio between the root and tip can be set to approximately 2:1. The new induction hardening method offers significant advantages in technical-economical and ecological respect. It is not possible to use the same steels for SDF and case hardening.


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    Title :

    eldec SDF surface hardening - a revolutionary induction hardening method


    Additional title:

    Ein revolutionäres Induktions-Härteverfahren


    Contributors:
    Schwenk, W. (author) / Peter, H.J. (author)


    Publication date :

    2005


    Size :

    12 Seiten, 11 Bilder, 12 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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