Device for press-forming a thin sheet and press-forming method

B - Operations – Transporting – 21 – D

Patent

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Details

B21D 37/00 (2006.01) B21D 24/00 (2006.01) B30B 15/28 (2006.01)

Patent

CA 2686539

Assuming at least any one of a punch and a die is a die to be measured, a press molding device has a distortion quantity measuring means, which is installed in the die to be measured and measures the quantity of distortion of the die due to press molding. When the die to be measured is located at the bottom dead center of molding, the distortion quantity measuring means is disposed closer to the press side than the die shoulder R stop on the material outflow side. Assuming the radius of curvature of a curved profile on the surface of the die to be measured is R, the distortion quantity measuring means is preferably installed in a region of 10xR from the center of curvature of the curved profile.

Selon l'invention, un dispositif de moulage par compression comprend au moins un poinçon et une matrice destinée à être mesurée et comporte un moyen de mesure de la quantité de distorsion, installé dans la matrice à mesurer et mesurant la quantité de distorsion causée à la matrice par le moulage par compression. Lorsque la matrice à mesurer se trouve au niveau de la contre-pointe de centrage inférieure du moulage, le moyen de mesure de la quantité de distorsion se trouve plus près de la presse que de la butée du profil de matrice R sur la face d'évacuation de la matière. R représentant le rayon de courbure d'un profil incurvé sur la surface de la matrice à mesurer, le moyen de mesure de la quantité de distorsion est installé de préférence sur une zone située à 10 x R du centre de la courbure du profil incurvé.

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