Method and apparatus for inductively heating an electrically conductive workpiece

摘要

An apparatus for inductively heating an electrically conductive workpiece in the form of a closed ring includes a U-shaped magnet core with two legs, an electrically conducting coil arranged on at least one leg of the core and connectable with an alternating current source, and a magnet yoke spaced from at least one freestanding end of a leg of the core, so that a closed magnetic circuit with at least one air gap is formed, with the height of the air gap chosen such that the workpiece can be moved in a non-contacting manner into the air gap.

主权项

1. A device for inductively heating an electrically conductive workpiece (2) made in the form of a closed ring,
wherein the device has a first U-shaped magnet core (3) with two legs (4) and at least one electrically conducting coil (5) wound around at least one of the legs (4) of the first U-shaped magnet core (3) and connectable with an alternating current source, wherein a magnet yoke (6) is provided in spaced relation to at least one freestanding end of one of the legs (4) of the first U-shaped magnet core (3) so that a closed magnetic circuit with at least one air gap (7) between the at least one freestanding end and the magnet yoke is formed, and wherein the height of the at least one air gap (7) is chosen to permit the electrically conducting workpiece (2) to be moved in a non-contacting manner through the air gap (7).