System and method for controlling oil-injection of machine tool
AssigneeBuffalo Machinery Company Limited
InventorsYi-Lin He, Hsun-Fu Chiang, Chia-Hui Tang, Paul Chang
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Abstract
A control system for controlling oil-injection of a machine tool includes a sensor, a signal-processing device and a control device. The sensor senses movement of a machine component of the machine tool and outputs a sense signal to the signal-processing device. The signal-processing device derives analysis signals from the sense signal and sends the analysis signals to the control device. The control device determines whether to output an oiling signal to the machine tool to trigger an oiling device to oil the machine component according to an accumulated moving distance and a variation value that are calculated based on the analysis signals.
Claims20
A control system for controlling oil-injection of a machine tool that includes an oiling device and a machine component, said control system comprising:
- a sensor that is to be disposed on the machine tool, and that is configured to sense movement of the machine component and to output, based on the movement of the machine component thus sensed, a sense signal related to vibration of the machine component;
- a signal-processing device that is capable of communication with said sensor to receive the sense signal from said sensor, and that is configured to derive, from the sense signal thus received, a low-frequency signal and a high-frequency signal that correspond respectively to different frequency bands;
- and
- a control device that is electrically connected to said signal-processing device and that is configured to
- receive the low-frequency signal and the high-frequency signal from said signal-processing device,
- calculate an accumulated moving distance based on the low-frequency signal,
- calculate a vibration-variation value based on the high-frequency signal,
- output an oiling signal to the machine tool when the accumulated moving distance thus calculated is greater than a moving-distance threshold, the oiling signal triggering the oiling device to oil the machine component, and
- output the oiling signal to the machine tool when the vibration-variation value thus calculated is greater than a vibration-variation threshold.
A method for controlling oil-injection of a machine tool that includes an oiling device and a machine component, the method to be implemented by a control device electrically connected to a signal-processing device, the signal-processing device deriving a low-frequency signal and a high-frequency signal corresponding respectively to different frequency bands from a sense signal outputted by a sensor, the sensor sensing movement of the machine component and outputting the sense signal related to vibration of the machine component, the method comprising steps of:
- calculating an accumulated moving distance based on the low-frequency signal;
- calculating a vibration-variation value based on the high-frequency signal;
- outputting an oiling signal to the machine tool to trigger the oiling device to oil the machine component when the accumulated moving distance thus calculated is greater than a moving-distance threshold;
- and
- outputting the oiling signal to the machine tool when the vibration-variation value thus calculated is greater than a vibration-variation threshold.
Dependencies are inferred from the claim text.