Arrangement for inductive heating of tool holder to release tool shaft has auxiliary induction coil generating magnetic field in protruding shaft region to compensate main coil's stray magnetic field

摘要

The arrangement has a main induction coil arrangement (13) supplied with periodically alternating amplitude electric current for generating a magnetic field for heating the tool holder's (1) sleeve section (5) and an auxiliary induction coil arrangement (25) supplied with periodically alternating amplitude current for generating a magnetic field in the protruding shaft (11) region to compensate a main coil arrangement stray magnetic field.