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US 7,647,853 B2Granted
Metal cutting apparatus and method for damping feed-back vibrations generated thereby
AssigneeSandvik Akiebolag
InventorMikael Lundblad
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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.
Claims15
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 and out-of-phase therewith by other than 180 degrees.
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Dependencies are inferred from the claim text.