Die for punching sheet metal and sheet metal punching...

B - Operations – Transporting – 21 – D

Patent

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Details

B21D 28/34 (2006.01)

Patent

CA 2686479

A thin plate metal punching die (10) is provided with an end surface (60) which faces a thin plate metal to be punched; a through hole (62), which is opened on the end surface (60) and has a punch (13) inserted from an opening (61) on the end surface (60); and an inner circumference surface (63) which defines the through hole (62). The end surface (60) and the inner circumference surface (63) are connected at the opening (61) on the end surface (60) of the through hole (62) at an acute angle (.theta.).

La présente invention concerne une matrice de perforation de métal en plaque mince (10) pourvue d'une surface d'extrémité (60) qui est située en face d'un métal en plaque mince destiné à être perforé ; un trou passant (62), qui est ouvert sur la surface d'extrémité (60) et présente un poinçon (13) inséré par une ouverture (61) sur la surface d'extrémité (60) ; et une surface de circonférence interne (63) qui définit le trou passant (62). La surface d'extrémité (60) et la surface de circonférence interne (63) sont reliées au niveau de l'ouverture (61) sur la surface d'extrémité (60) du trou passant (62) selon un angle aigu (.theta.).

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