| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method which can easily and swiftly discriminate whether the bottom dead center position of a press machine lies at a proper position or not without measuring the precision of an actual press product, and to provide a method which can easily and swiftly adjust the bottom dead center position to a proper position, and a press machine which can perform these methods. Ž<P>SOLUTION: The bottom dead center position of a press machine provided with a slide movable to a direction approaching a bolster and to a direction separating therefrom is adjusted. By a marking part with a plurality of projecting parts whose height dimensions are different formed on at least either of a pair of dies fitted to the bolster and the slider, a recessed part is formed at the non-product region of a workpiece at the bottom dead center position by the pressing action of the projecting parts, and, based on the number of the recessed parts formed at the bottom dead center position, whether the bottom dead center position of the slider is proper or not is discriminated, or based on the information of the number of the recessed parts, the bottom dead center position is adjusted. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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