Press molding method and press-forming device of a thin plate

摘要

The press molding device, when designating one as the measuring object die, at least either the punch and the die/di, is installed inside the said measuring object die, possesses the distortion quantitative measurement expedient in order to measure the distortion quantity of the said measuring object die which it occurs according to press molding. Distortion quantitative measurement expedient, when the measuring object die is a formation bottom dead center position, the die/di shoulder R stopping of material outflow side compared to is arranged on press direction side. As for distortion quantitative measurement expedient, when designating the radius of curvature of the curve form which the measuring object die has on the surface as R, it is desirable from the center of curvature of the aforementioned curve form to be installed inside the territory within 10 R.