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US 2018/0313403 A1Published application
Failure detection device for spindle head of machine tool including a plurality of sensors
AssigneeFanuc Corporation
InventorYohei Kamiya
Life of this patent
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Abstract
A failure detection device includes a formaldehyde sensor that detects the generation of formaldehyde, a vibration sensor that detects vibration of a spindle head, and a machine controller that detects the occurrence of an abnormality of a spindle bearing. The machine controller determines the occurrence of the abnormality of the spindle bearing and a cause of the abnormality based on a change in the output value of the formaldehyde sensor over time and a change in the output value of the vibration sensor over time.
Claims8
A failure detection device for detecting an abnormality of a spindle head of a machine tool, comprising:
- first sensor that detects generation of predetermined first gas in the spindle head;
- second sensor that detects a change in a state of the spindle head that is different from the generation of the first gas;
- and
- a controller that determines whether at least one of a bearing and an oil seal arranged in the spindle head is abnormal or not, wherein
- the second sensor is one of a gas sensor that detects generation of predetermined second gas in the spindle head, an odor sensor that detects the generation of the second gas in the spindle head, a vibration sensor that detects vibration of the spindle head, a sensor that detects elastic wave generated in the spindle head, and a humidity sensor that detects humidity in the spindle head, and
- the controller determines a member in which abnormality occurs among the bearing and the oil seal and cause of the abnormality based on a change in an output value of the first sensor over time and a change in an output value of the second sensor over time.
3 more elements
Dependencies are inferred from the claim text.