Tool-life prediction system and method thereof

1. A tool-life prediction method, applicable to a machine tool having a machining end, comprising the steps of:

(1) capturing a plurality of measurement data from a tool of the machining end;

(2) transforming each of the plurality of measurement data into a corresponding complex process capability index (Cpk);

(3) utilizing an artificial neural network being trained to generate a tool-life prediction scale with respect to the Cpk, including the steps of:

(31) establishing the artificial neural network according to a train database, wherein the train database includes the Cpk and the tool-life prediction scale;

(32) determining whether a training for the artificial neural network has finished, adopting a recurrent neural network (RNN) when finished, and going back to perform the step (2) when the training is not yet finished; and

(33) when the training is finished, applying the artificial neural network to estimate the tool-life prediction scale for the corresponding Cpk, and updating the train database; and

(4) determining a remaining tool life of the tool based on the tool-life prediction scale.

2. The tool-life prediction method of claim 1 , wherein the step (4) includes the steps of:

(41) determining whether a threshold for replacing the tool is exceeded based on the tool-life prediction scale; and

(42) if the threshold is exceeded, issuing a tool processing command to the tool.

3. The tool-life prediction method of claim 2 , wherein, after the step (41), if the threshold is not exceeded, then the tool-life prediction method goes back to perform the step (1).

4. The tool-life prediction method of claim 1 , wherein the plurality of measurement data is a dimension of the tool.