B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 28/34 (2006.01) B21D 28/10 (2006.01) B21D 28/28 (2006.01) B26F 1/14 (2006.01) B21D 26/02 (2006.01)
Patent
CA 2636463
A punch, apparatus and method for forming opposing holes in a hollow part, and a part formed therefrom. The punch includes an end portion adapted to pierce an entry hole and bend material around the entry hole to form a retained slug along an inner edge of the entry hole. The punch also includes an enlarging portion adapted to enter the entry hole after the end portion to enlarge the entry hole by bending the slug and additional material towards the interior' of the part. The punch has a length greater than a cross-section of the part such that further advancement of the punch through the part punches an exit hole in the part opposite the entry hole.
La présente invention concerne un poinçon, un appareil et un procédé destinés à former des orifices opposés dans une partie creuse, et une partie ainsi formée. Le poinçon comprend une partie terminale conçue pour percer un orifice d~entrée et plier un matériau autour de l~orifice d~entrée afin de former une débouchure retenue le long d~un bord interne de l~orifice d~entrée. Le poinçon se compose également d~une partie d~élargissement conçue pour s~introduire dans l~orifice d~entrée après la partie terminale afin d~élargir l~orifice d~entrée en pliant la débouchure et un matériau supplémentaire vers l~intérieur de la partie. La longueur du poinçon est supérieure à une section transversale de la partie, ce qui permet au poinçon lorsqu~il progresse le long de la partie de percer un orifice de sortie dans la partie opposée à l~orifice d~entrée.
Bliss Martin L.
Coelho Jose U.
Dunn David J.
Marks & Clerk
Vari-Form Inc.
LandOfFree
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