| 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 <i>fo</i>, in a mode selected among traction-compression and torsion, variable between a lower limit <i>fomin</i> and an upper limit <i>fomax</i>, and it does not have itself any other resonance frequency in a range between a frequency <i>fpmin</i> < <i>fomin</i> and a frequency <i>fpmax</i> > <i>fomax</i>. |
