Metal cutting apparatus and method for damping feed-back vibrations generated thereby
OwnerMikael Lundbladinventor
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Abstract
Feed back vibrations of a metallic tool generated during the machining of metallic workpieces are damped by detecting an oscillatory motion of the tool, identifying a frequency of the oscillatory motion and generating a mechanical camping force having the same frequency as the oscillatory motion and applied to the tool in counter-direction to a velocity of the oscillatory motion. The damping force can be of constant amplitude or gradually decreasing amplitude.
Claims32
A method for damping feed-back vibrations of a metallic tool during the chip removing machining of a metal workpiece comprising the steps of:
- A. causing a sensor device to detect an oscillatory motion of the tool;
- B. causing a control device to identify the frequency of the oscillatory motion detected in step A;
- and
- C. causing a vibration damping device to generate a mechanical damping force having substantially the same frequency as the frequency identified in step B and applied to the tool in counter-direction to a velocity of the oscillatory motion.
A vibration damping system for damping feed-back vibrations of a mechanical tool during the chip-removing machining of metal workpieces, the apparatus comprising:
- a sensor device for detecting an oscillatory motion of the tool during a machining operation;
- a control device operably connected to the sensor device for identifying a frequency of the oscillatory motion sensed by the sensor device;
- and
- a vibration damping device for generating a mechanical damping force having substantially the same frequency as the oscillatory motion and a counter-direction relative to the direction of the velocity of the oscillatory motion.
A metal cutting apparatus for the chip removing machining of metal workpieces, the apparatus comprising:
- a metal-cutting tool;
- and
- a vibration damping system operably connected to the tool and comprising:
- a sensor device for detecting an oscillatory motion of the tool during a machining operation;
- a control device operably connected to the sensor device for identifying a frequency of the oscillatory motion sensed by the sensor device, and
- a vibration damping device for generating a mechanical damping force having substantially the same frequency as the oscillatory motion and applied to the tool shaft in counter-direction to a velocity of the oscillatory motion.
Dependencies are inferred from the claim text.