Device for clamping and unclamping a tool through inductive warming of a tool holder

摘要

The device has an induction coil arrangement with an induction coil (6) that is energized with an electrical current. A magnetically and electrically non conductive concentrator body (11) concentrates magnetic flux of the coil at a region of tool sided end of a sleeve section (2). The concentrator body carries an inductive attachment (14) made of an electrical conductive material e.g. copper. A supporting ring is made of heat resistant plastic. The attachment is permeated by a field that runs a part outside the concentrator body such that current is induced in the attachment.