Machine tool
AssigneeMakino Milling Machine Co., Ltd.
InventorSakyo Matsushita
Life of this patent
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Abstract
A machine tool is configured so that: a first frequency band comprising the main shaft characteristic vibration frequency and a second frequency band comprising the mechanical structure characteristic vibration frequency are set; thresholds are stored for each of the set frequency bands; vibration components are extracted for each of the frequency bands from the output of a vibration sensor; and when the vibration amplitude exceeds a threshold in either of the frequency bands, an alarm is sounded.
Claims5
A machine tool including a vibration sensor configured to measure vibration and detecting abnormal vibrations during machining, the machine tool comprising:
- a frequency band setting unit configured to set, within a range of frequencies that can be measured by the vibration sensor, a first frequency band including a natural frequency of a spindle system, and a second frequency band including a natural frequency of a movement system, and a third frequency band including a natural frequency of a fixed system of a feed axis device, and
- a filter unit configured to extract vibration components in the first, second and third frequency bands from an output from the vibration sensor.
A machine tool including a vibration sensor configured to measure vibration and detecting abnormal vibrations during machining, the machine tool comprising:
- a frequency band setting unit configured to set, within a range of frequencies that can be measured by the vibration sensor, a first frequency band including a natural frequency of a spindle system, a second frequency band including a natural frequency of a movement system, and a third frequency band including a natural frequency of a spindle rotation, and
- a filter unit configured to extract vibration components in the first, second and third frequency bands from an output from the vibration sensor.
Dependencies are inferred from the claim text.