Design improvements for increasing lifetime of single-shot coils applied at rotating workpieces

9th International Symposium on Electromagnetic Processing of Materials

材料科学;物理学

Schubotz, S.^1 ; Nacke, B.^2

EFD Induction GmbH, Lehener Str. 91, Freiburg im Breisgau

79106, Germany^1

Institute of Electrotechnology, Leibniz Universität Hannover, Wilhelm-Busch-Str. 4, Hannover

30167, Germany^2

关键词: Design improvements;    High power density;    Hot spot;    Induction hardening;    Material stress;    Mechanical stress;    Single shots;    Workpiece;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/424/1/012071/pdf
DOI  :  10.1088/1757-899X/424/1/012071

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In the industry, induction hardening of rotationally symmetrical workpieces by a single-shot process is a widespread method. Due to only partial superimposition of the workpiece areas to be heated by the coil, high power densities are often needed there. These lead to local hot spots, amounting to an intensive material stress and often result in a short lifetime of the inductor. In this paper, some numerically investigated models will be presented, revealing approaches, how to reduce mechanical stress in the single-shot coil and thus, enabling an increase of service life.