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US 12,285,830 B2Granted
Spindle with piezoelectric actuators
AssigneeMitis
InventorSylvain Laporte
Life of this patent
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Abstract
Spindle for carrying out machining assisted by non-ultrasonic axial oscillations, including a tool-bearing shaft, and an exciting portion, for subjecting the shaft to non-ultrasonic axial oscillations, especially during its rotation. The exciting portion including a first exciting stage, having at least one piezoelectric actuator, and a second exciting stage, having at least one piezoelectric actuator, having a non-zero axial overlap with the first exciting stage, the actuators of the two stages being arranged so that their effects add.
Claims24
A spindle for performing machining assisted by non-ultrasonic axial oscillations, comprising:
- a tool-holding shaft, and
- an exciter part, for submitting the shaft to non-ultrasonic axial oscillations, this exciter part comprising:
- a first exciter stage, comprising at least one piezoelectric actuator,
- a second exciter stage, comprising at least one piezoelectric actuator, having a non-zero axial overlap with the first exciter stage, the actuators of the two stages being disposed so as to add together their effects.
1 more element
Dependencies are inferred from the claim text.