| 摘要 |
A method of monitoring a wear state of a mold for a press through audible signal processing is provided to detect an erroneous audible signal caused by the abrasion or the breakage of the mold so that a worker recognizes the necessity of a polishing process to exactly cope with the situation. A sensor(1), which is able to detect an audible or vibration signal in a press during a blanking process, is installed on the bed of the press. Information on the signal detected by the sensor is delivered to a real-time monitoring system, so that the press is controlled and information is provided to a worker. A fixing groove is formed on the bed of a press machine to fix a housing. The sensor(1) is inserted into the housing and fixed by a screw. The abrasion or breakage of a mold is monitored in real time by frequency analysis of the signal using a low-pass filter and fast-Fourier transform(FFT).
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