Ultrasonic shaping instrument
AssigneeEcole D'Ingenieurs
InventorsGerard Huguenin, Pierre Pasche
Life of this patent
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Abstract
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.
Claims10
Ultrasonic shaping instrument including:
- 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 unit (12) for controlling and powering the sonotrode (14), characterized in that it is dimensioned such that:
- the assembly formed by the sonotrode (14) and the tool (16) has an ultrasonic resonant frequency fo, in a mode selected from among traction-compression and torsion, capable of varying between a lower limit fomin and an upper limit fomax, and
- it does not itself have any other resonant frequency within a range comprised between a frequency fpmin<fomin and a frequency fpmax>fomax,
- and in that the control unit (12) is of the type generating a sinusoidal signal frequency modulated by a quasi-random signal, so as to apply a passband electric signal comprised between a minimum frequency femin and a maximum frequency femax, femin being comprised in the interval fpmin-fomin and femax in the interval fomax-fpmax.
Dependencies are inferred from the claim text.