Elotherm Gmbh

Sms Elotherm Gmbh

Peter Schulte

Waldemar Gezarzick

Hans-J&uuml;rgen Leissner

Hans-J&uuml;rgen Leisner

Stefan Dappen

Matthias Blum

Martin Bröcking

Richard Dyksik

An inductor is provided for the simultaneous inductive heating of two tracks or ways which are formed next to one another on a metallic workpiece, having a first segment which is associated with the first track or way and a second segment which is associated with the second track or way, and having two supply arms via which the segments can be connected to a power supply. To enable two tracks or ways to be heated simultaneously to the hardening temperature without heating the material portion situated between the tracks or ways the segments of the inductor and the supply arms are connected together in an inductor in such a way that the fields travelling at right angles to the longitudinal extent of the tracks or ways neutralize each other in the region of the material portion which separates the tracks or ways from one another.

Inductor and use of such an inductor

A procedure for hardening at least one surface (S, L) of a wall (W) of a component (T), in which the surface to be hardened (S, L) is inductively heated with at least one inductor ( ), in which liquid is filled into a gap (P) between the surface to be hardened (S, L) and the inductor ( ) while heating the surface to be hardened (S, L), in which the side (AS) of the wall (W) opposite the side (IS) of the wall (W) provided with the surfaces to be hardened (S, L) is sprayed with liquid while heating the surface to be hardened (S, L), and in which at least one liquid jet (KI) is aimed at a zone (RZ) of the wall (W) that is adjacent to the surface to be hardened (S, L), and to be precluded from heating by the inductor ( ). The procedure according to the invention makes it possible to tailor the hardening of at least one surface to the respective requirements, even on the walls of complexly shaped components with a small wall thickness.

Procedure for hardening at least one surface of a wall of a component and device for its execution

This invention relates to a procedure for hardening the bearing surfaces (H ,H ,H ,H ) of a shaft or axle, in particular a crankshaft ( ) or camshaft, in which the bearing surfaces (H -H ) to be hardened are hardened sequentially with the shaft or axle turning around their longitudinal axis (L) by means of a heating and quenching device ( ), in which the distortion of the shaft or axle that arises in the area of the respective bearing surface (H ) during the course of hardening is determined, in which the shaft or axle is supported by at least one supporting device ( ) during hardening of a bearing surface (H -H ), which is placed against a previously hardened bearing surface (H ), and in which the setting of the supporting device ( ) is regulated taking into account the distortion determined for the bearing surface (H ), against which the supporting device ( ) is placed, and a device which enables hardening of crankshafts with a minimal distortion.

Method and device for hardening bearing surfaces of crankshafts

A method for simultaneously hardening a group of cams on a camshaft comprises first heating the group of cams at low power for at least one heating interval, then pausing the heating for a pause interval during which no power is applied to the group of cams, and then subsequently heating the group of cams at high power for one heating interval. The pause intervals, during which no power is applied to the group of cams, are sufficient as to allow heat stored in the cams to distribute uniformly throughout the cams. Each group of cams is hardened by a linear inductor and the regions of the camshafts that are not to be hardened are shielded by a cooling device.

Growing community of inventors

Wuppertal, Germany

Peter Schulte