REMOVING METHOD OF CIRCULAR MATERIAL COMPRISING MAGNETIC BODY OUT OF SHAFT AND REMOVING DEVICE USED FOR THE METHOD

摘要

PURPOSE:To provide a removing method of circular material comprising a magnetic body capable of efficiently and easily removing the circular material firmly junctioned with a shaft using relatively small power without depending upon any expert operator. CONSTITUTION:The a circular material comprising a magnetic body can be removed from a shaft by a method wherein a closed magnetic path abutting against the circular material 12 comprising a magnetic body to be removed from a shaft 11 is made on the opened part of partly opened iron cores 13-15 internally having exciting coil 16 to be fed with Ac so that the circular material 12 may be thermally expanded by the heat generated by hysteresis loss and eddy current loss to be removed from the shaft 11.