Electric induction heat treatment

Details Electric induction heat treatment Electric induction heat treatment

C - Chemistry, Metallurgy

21

D

C21D 9/32 (2006.01) H05B 6/36 (2006.01)

Patent

CA 2693786

An induction coil with inner and outer coil segments joined together by a transition segment is arranged so that the outer coil segment generally inductively heat treats an annular outer region of a workpiece positioned under the coil, the inner coil segment generally inductively heat treats an annular inner region of the workpiece, and the transition segment traverses at least a portion of the width of the overall annular region of the workpiece to be heat treated. Relative arrangement of inner, outer and transition coil segments pro-vides for controlled induction heat treatment across the over-all annular region such as the gear teeth region of an intersect-ing axes or non intersecting and non parallel axes gear.

L'invention concerne une bobine d'induction avec des segments de bobine interne et externe unis ensemble par un segment de transition qui est agencée de telle sorte que le segment de bobine externe traite thermiquement de manière généralement inductive une région externe annulaire d'une pièce à travailler positionnée sous la bobine, le segment de bobine interne traite thermiquement de manière généralement inductive une région interne annulaire de la pièce à travailler et le segment de transition traverse au moins une partie de la largeur de toute la région annulaire de la pièce à travailler qui doit être traitée thermiquement. Un agencement relatif des segments de bobine interne, externe et de transition assure un traitement thermique par induction régulé à travers toute la région annulaire telle que la région de dents d'engrenage des axes concourants ou des axes non concourants et non parallèles.

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