Induction heat treatment of complex-shaped workpieces

H - Electricity – 05 – B

Patent

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H05B 6/44 (2006.01)

Patent

CA 2749847

Apparatus and method are provided for induction heating of one or more components of a complex shaped workpiece. The component is positioned within an opening formed by opposing pairs of arcuate coil structures formed in opposing inductor segments. One inductor segment is formed from electrically isolated inner and outer active inductor segments connected to one or more power supplies while the other inductor segment is formed from electrically isolated inner and outer passive inductor segments that are magnetically coupled with respective inner and outer active inductor segments. Changing the output electrical parameters of the one or more power supplies controls the induction hardening along the transverse width of the workpiece with optional flux concentrators between opposing pairs of arcuate coil structures.

L'invention concerne un appareil et un procédé de chauffage par induction d'un un ou de plusieurs des composants d'une pièce de forme complexe. Le composant est placé dans une ouverture formée en opposant une paire de structures arquées de bobine formées dans des segments inducteurs opposés. L'un des segments inducteurs est fait de segments inducteurs actifs intérieur et extérieur isolés électriquement et reliés à une ou des alimentations. L'autre segment inducteur est formé à partir de segments inducteurs passifs intérieur et extérieur isolés électriquement et respectivement couplés magnétiquement aux segments inducteurs actifs intérieur et extérieur. En modifiant les paramètres de la ou des alimentations, on règle le durcissement par induction sur la largeur transversale de la pièce en disposant des concentrateurs de flux facultatifs entre les paires opposées de structures arquées de bobine.

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