Device and a method for preventing or reducing vibrations in...

Turning – Process of turning

Reexamination Certificate

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Details

C082S158000, C082S904000, C409S141000, C408S143000, C188S380000, C267S137000

Reexamination Certificate

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11168653

ABSTRACT:
An arrangement for reducing vibrations in a tool holder (4) with a cutting tool (3) and has a vibration sensor on the tool holder (4) that is connected to a guide unit (11). The tool holder (4) has further two piezo-electric actuators14and15.Under the influence of the vibration sensor (9), the guide unit (11) provides an electric alternating current that is actively guided over time so that the actuators movably affect the tool holder (4) to reduce the vibrations in this. To also be able to dampen transients in the tool holder (4) this is movably connected with a passive dampening arrangement that is independent of the guide unit (11) and that is based on the principle of a springing (8) suspended mass (7). The invention also relates to a method for reducing vibrations. The vibrations in the tool holder are sensed and a corresponding signal is provided to a guide unit that over time provides actively guided signals to the actuators. The tool holder is also passively influenced by a dampening arrangement that is independent of the guide unit.

REFERENCES:
patent: 3642378 (1972-02-01), Hahn et al.
patent: 4553884 (1985-11-01), Fitzgerald et al.
patent: 5170103 (1992-12-01), Rouch et al.
patent: 6661157 (2003-12-01), Lundblad
patent: 6925915 (2005-08-01), Claesson et al.
patent: 2002/0036091 (2002-03-01), Claesson et al.
patent: 2002/0083805 (2002-07-01), Lundblad
patent: 6-31508 (1994-02-01), None

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