Induction heat treatment of complex-shaped workpieces

H - Electricity – 01 – F

Patent

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Details

H01F 27/08 (2006.01) C21D 1/10 (2006.01) H05B 6/02 (2006.01) H05B 6/10 (2006.01) H05B 6/22 (2006.01) H05B 6/36 (2006.01) C21D 1/42 (2006.01) C21D 9/28 (2006.01) C21D 9/30 (2006.01)

Patent

CA 2514427

An inductor for stationary induction heating of one or more components of a complex shaped workpiece comprises a pair of inductor segments. The first inductor segment is connected to a high frequency ac power supply and the second inductor segment is magnetically coupled to the magnetic field created by the flow of ac current in the first inductor segment. Opposing partial openings in the first and second inductor segments form an opening in which the component can be inductively heated. The first and second inductor segments are alternatively configured in a mix of single turn, multiple single turns connected in parallel, or multiple turn coils in combination to reduce non uniform induced cross sectional currents across the axial length of the component being inductively heat treated.

Cette invention concerne une bobine d'induction pour chauffage stationnaire par induction d'un ou de plusieurs composants de forme complexe. Cette bobine comprend une paire de segments d'induction. Le premier segment de bobine d'induction est connecté à une alimentation en courant alternatif haute fréquence et le second segment de bobine d'induction est couplé magnétiquement au champ magnétique créé par le flux de courant alternatif dans le premier segment. Des ouvertures partiellement opposées dans les premier et second segments de bobine d'induction forme une ouverture dans laquelle le composant peut être chauffé par induction. Ces premier et second segments de bobine d'induction peuvent se présenter selon les cas sous la forme d'un enroulement unique, d'enroulements uniques multiples branchés en parallèle ou de bobinages à enroulements multiples en combinaison de manière à réduire les courants transversaux non uniformes induits au travers de la longueur axiale du composant soumis à traitement thermique par induction.

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