B - Operations – Transporting – 21 – C
Patent
B - Operations, Transporting
21
C
B21C 37/15 (2006.01) B21B 17/14 (2006.01) B21D 7/08 (2006.01)
Patent
CA 2749686
A lightweight hollow member having a high strength such as at least 780 MPa, a complicated shape which can be applied to automotive parts, a high stiffness, and excellent impact properties, and a manufacturing apparatus and method which can form the hollow member by simple steps and which use relatively small and inexpensive forming equipment are provided. The manufacturing apparatus 10 has a feed unit 11 which feeds a hollow steel material being worked 20 having a closed transverse cross-sectional shape in its lengthwise direction, a support unit 12 which supports the material being worked 20 while it is being fed at a first position A, a heating unit 13 which heats the material being worked 20 at a second position B, a transverse cross-sectional shape modifying unit 14 which carries out working to modify the transverse cross-sectional shape of the material being worked 20 at a third position C, and a cooling unit 15 which cools the material being worked 20 at a fourth position D.
L'invention concerne un élément creux léger, qui est hautement résistant, à p. ex., 780 MPa ou plus, qui a des formes complexes applicables à des pièces automobiles, qui est hautement rigide, et qui a d'excellentes caractéristiques de comportement aux chocs, et l'invention concerne également un dispositif de fabrication et un procédé de fabrication, pouvant former l'élément creux par un simple processus et ayant une machine à mouler relativement petite et peu coûteuse. L'invention concerne un dispositif de fabrication (10) qui est équipé d'une unité d'alimentation (11) pour alimenter un matériau d'acier creux (20) ayant une forme de coupe transversale horizontale fermée dans le sens de la longueur de celle-ci, une unité de support (12), qui supporte ce matériau alimenté (20) au niveau d'une première position (A), une unité de chauffage (13), qui chauffe le matériau (20) au niveau d'une deuxième position (B), une unité de changement de forme de coupe transversale horizontale (14), qui effectue le travail pour changer la forme de coupe transversale horizontale du matériau (20) au niveau d'une troisième position (C), et une unité de refroidissement (15), qui refroidit le matériau (20) au niveau d'une quatrième position (D).
Kubota Hiroaki
Tomizawa Atsushi
Gowling Lafleur Henderson Llp
Sumitomo Metal Industries Ltd.
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