Patent ID: 6077475
Filing Date: 2000-06-20
Classification: C21D,Y02P

Abstract:
Arrangement for hardening profiled camshafts by means of an inductor into which a camshaft can be inserted during a hardening operation, for heating by a magnetic field emanating from the inductor, wherein said inductor comprises:a plurality of substantially parallel axial members which are distributed peripherally about a longitudinal center axis of the inductor;a plurality of radial members coupled between adjacent pairs of axial members such that an induction current can flow through said axial members and radial members during a hardening operation; anda plurality of discrete magnetic field focussing elements provided on the axial members for focusing the magnetic field in the radial direction, a position and the width of the dynamo sheets being adaptable to a surface profile of a camshaft such that the focusing of the magnetic field is aimed at areas of the camshaft with a smaller diameter;wherein each of said discrete magnetic field focusing elements comprises a laminated stack of U-shaped core plates, and is detachably mountable on said axial members at continuously variable axial positions.