INDUCTION HEATING DEVICE, SLEEVE ELEMENT AND METHOD FOR A WEAR PROTECTION OF A MAGNETIC FLUX CONDUCTING ELEMENT BY THE SLEEVE ELEMENT

An induction heating device for a shrink-clamping and/or unshrink-unclamping of tools into and/or out of a tool holder, includes an induction heating unit having at least one induction coil configured to thermally expand at least a portion of a tool holder arranged in a receiving region of the induction heating unit, and includes at least one magnetic flux conducting unit for a conduction of a magnetic flux generated by the induction coil, having at least one magnetic flux conducting element, preferably supported movably relative to the receiving region and implemented at least to a large extent of a ferrite material, and includes a sleeve element, arranged on the magnetic flux conducting element and covers the magnetic flux conducting element on at least one side of the magnetic flux conducting element that faces toward the receiving region in at least one operating state of the magnetic flux conducting unit.