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, the induction heating device having:

• an induction heating unit which comprises at least one induction coil, the induction coil being configured, during a shrink-clamping and/or unshrink-unclamping process, to thermally expand at least a portion of the tool holder that is arranged in a receiving region of the induction heating unit;
• at least one magnetic flux conducting unit for a conduction of a magnetic flux generated by the induction coil, the magnetic flux conducting unit comprising at least one magnetic flux conducting element;
• and
• a sleeve element, which is arranged on the magnetic flux conducting element and which 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.