| 摘要 |
A device for clamping and unclamping of tools comprising a tool shaft, by which device a sleeve section (2) of a tool holder (1) comprising a centric receiver opening (4) for a shaft (5) of a rotation tool is inductively heated, which sleeve section retains the shaft (5) of the tool seated in the receiver opening (4) in a press fit, and releases it upon heat up, which device comprises an induction coil assembly with at least one induction coil (6), which can be fed by an electric current for heating the sleeve section (2), and which comprises a concentrator body (11), which is magnetically conductive and electrically nonconductive or substantially electrically nonconductive, which concentrates the magnetic flux of the induction coil (6) onto the portion of the tool side end of the sleeve section (2), wherein the concentrator body (11) supports an induction attachment (14) made of electrically conductive material.
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