Method for machining metal plate

B - Operations – Transporting – 21 – D

Patent

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Details

B21D 17/04 (2006.01)

Patent

CA 2250756

The present invention relates to a method for forming weakenings in a metal plate (8), comprising of: deforming the metal plate to a predetermined depth to form a weakening thinned portion along at least one line; and bending the metal plate along the line, characterized by displacing relative to each other the metal plate and at least one tool deforming the metal plate along the line and over at least one surface of the metal plate with a force directed substantially transversely of the metal plate and sufficient to deform the metal plate. The invention also relates to a device for performing thereof.

Procédé permettant de créer des zones d'affaiblissement dans une plaque métallique (8), et consistant à déformer la plaque métallique jusqu'à une profondeur prédéterminée afin de créer une zone amincie d'affaiblissement le long d'au moins une ligne, et à plier la plaque métallique le long de la ligne. Ce procédé est caractérisé en ce que l'on déplace l'un par rapport à l'autre la plaque métallique et au moins un outil déformant la plaque métallique le long de la ligne et sur au moins une surface de la plaque métallique avec une force dirigée essentiellement transversalement à la plaque métallique et suffisante pour déformer cette dernière. L'invention se rapporte également à un dispositif permettant la mise en oeuvre du procédé.

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