| 摘要 |
An ultrasonic tool (13) is set into rotational movement to increase the performance of material removal. In addition, a magnetostrictive or piezoelectrical transducer (2) is used, which is coupled to a transformer (7) for amplification of the output amplitude. To lessen the constructional length, transducer and transformer are slid into each other in such a way that their constructional lengths at least partly overlap. Apart from that, transducer and transformer form a rotor which is mounted in non-contact bearings. With a device of this kind, optimal running trueness can be attained.
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