| 摘要 |
The invention concerns an ultrasonic shaping instrument comprising: a mount structure ( 10 ), a sonotrode ( 14 ) elastically mounted on the mount structure ( 10 ), a tool ( 16 ) fixed to the sonotrode ( 14 ) for carrying out shaping operations, and a control member ( 12 ) for controlling and powering the sonotrode ( 14 ). The instrument is dimensioned so that the assembly consisting of the sonotrode ( 14 ) and the tool ( 16 ) has a resonance ultrasonic frequency fo, in a mode selected among traction-compression and torsion, variable between a lower limit fomin and an upper limit fomax, and it does not have itself any other resonance frequency in a range between a frequency fpmin<fomin and a frequency fpmax>fomax.
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