| 摘要 |
PROBLEM TO BE SOLVED: To surely capture a change of AE resulting from generation of a press failure, such as cracks or constrictions in press molding. SOLUTION: This press monitoring system 9 for monitoring a molding failure in a press device 10 is equipped with an AE sensor 20 for detecting AE generated, when a molding material W is molded by the press device 10, an AE measuring means 21 for converting AE into an electrical signal; a numerical value processing means 22 for acquiring an AE waveform showing the intensity change of an electrical signal as a change in the voltage value; a friction coefficient measuring means 35 for measuring the friction coefficient of the molding material W; an evaluation reference determination means 24 for determining an AE waveform used as an evaluation reference by correcting the AE waveform measured at a molding time, when a nondefective article is acquired by a correction value determined by the friction coefficient; and an evaluation means 23 for evaluating existence of press failure generation, by comparing the evaluation reference with the AE waveform acquired by the numerical value processing means. COPYRIGHT: (C)2007,JPO&INPIT
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