Abstract: An apparatus for heating a metal billet such as a billet of non-ferrous metal, includes a frame, a heating container having a longitudinal billet receiving inner space, and at least one heater element configured to heat the heating container. The heating container is divided along parting surfaces into parts. The parts are movable arranged with respect to each other. Each part has a contact surface facing the longitudinal billet receiving inner space. Each part has at least one heater element configured to heat the part.

Abstract: A device for heating an object by an electromagnetic induction comprises at least one rotor, and the rotor comprises at least one permanent magnet. The device also comprises a stator for providing varying magnetic field arranged to interact with at least one magnet of the rotor and causing said rotor to rotate around the axis. The magnets of said rotor is arranged to provide varying magnetic field and eddy currents within the object when said rotor is rotated so that said object is heated by the electromagnetic induction generated by said varying magnetic field and eddy currents.

Abstract: A method and a corresponding tool for heating a metallic workpiece. In the method, the metallic piece is heated in a machine tool by attaching thereto an induction heating tool comprising a permanent magnet structure and by rotating and/or moving the metallic piece to be heated and the induction heating tool relative to each other at a suitable distance. In this case, heating eddy currents are induced in the piece, wherein the energy needed for heating is obtained from the motor of the machine tool.

Abstract: A device for heating an object by an electromagnetic induction comprises at least one rotor, and the rotor comprises at least one permanent magnet. The device also comprises a stator for providing varying magnetic field arranged to interact with at least one magnet of the rotor and causing said rotor to rotate around the axis. The magnets of said rotor is arranged to provide varying magnetic field and eddy currents within the object when said rotor is rotated so that said object is heated by the electromagnetic induction generated by said varying magnetic field and eddy currents.