Cold-forming process and apparatus

E - Fixed Constructions – 04 – C

Patent

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Details

E04C 2/30 (2006.01) B21D 5/08 (2006.01) B21D 11/20 (2006.01) B21D 11/22 (2006.01) B21D 13/02 (2006.01) B21D 13/10 (2006.01) B21D 37/10 (2006.01) B21D 37/12 (2006.01) E04B 1/32 (2006.01) E04B 7/08 (2006.01) E04B 7/10 (2006.01) E04C 2/32 (2006.01) E04C 2/38 (2006.01) E04C 2/40 (2006.01) E04H 7/30 (2006.01)

Patent

CA 2295487

This invention relates to sheet metal buildings of relatively large size and more particularly but not exclusively to processes and apparatus for cold- forming elongate building elements of such buildings and methods of building construction. The invention provides in one aspect cold-forming dies (30), mounted on intermediate transverse members (21) of a frame (1), comprising a set of coextensive generally in register dies between which the strip is received. The set comprises a male die (22) having a concave leading edge (24) and a female die (23) having a convex leading edge (18). The male die (22) and female die (23) are driven towards one another to plastically deform the strip (6) into a channel section. The concave leading edge (24) is provided with a coextensive protrusion (26) and the convex leading edge is provided with a coextensive recess (27). At the same time that the dies (22, 23) mate to plastically deform the strip (6) into a channel section the protrusion (26) and recess (27) of the respective dies (22, 23) mate to form a transverse rib (28) in the strip (6).

L'invention concerne des constructions en tôles de tailles relativement importantes, et plus particulièrement, mais non exclusivement, des procédés et un appareil pour former à froid des éléments allongés pour ces constructions, ainsi que des procédés de construction. Selon un aspect, l'invention fournit des matrices (30) de formage à froid, fixées sur des éléments transversaux intermédiaires (21) d'un châssis (1). Ce dernier comprend un ensemble de matrices, coextensives, généralement placées en correspondance, entre lesquelles la bande vient se loger. Cet ensemble de matrices comprend une matrice supérieure (22) comportant un bord d'attaque concave (24) et une matrice inférieure (23) comportant un bord d'attaque convexe (18). La matrice supérieure (22) et la matrice inférieure (23) sont entraînées l'une vers l'autre pour déformer de manière plastique la bande (6) en une section de canal. Le bord d'attaque concave (24) est pourvu d'une protubérance coextensive (26) et le bord d'attaque convexe est pourvu d'un évidement coextensif (27). En même temps que les matrices (22), (23) s'accouplent pour déformer, de manière plastique, la bande (6) en une section de canal, la protubérance (26) et l'évidement (27) des matrices correspondantes (22), (23) s'accouplent pour former une nervure transversale (28) dans la bande (6).

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