B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 22/02 (2006.01) B21D 22/22 (2006.01)
Patent
CA 2622770
An addendum shape portion (20) of a panel material (11) is drawn by a drawing portion (15) of a press forming die (7) by an amount equal to or less than the limit to which the panel material (11) can be drawn, whereby a to-be-product portion (19) of the panel material (11) is roughly conformed to a forming face (8) of a punch (9). In this state, the to-be-product portion (19) of the panel material (11) is stretched or drawn. Accordingly, the cross section of the to- be-product portion (19) is uniformly changed at the minimum level, which makes it possible to produce, by press forming, a fender panel (1) made of aluminum base alloy, which has a great plane dimension L and high quality. As a result, flexibility in the design of panel parts, which are formed by pressing the panel material (11) into shapes, is increased.
Un complément de forme (20) d'un panneau (11) résulte d'un emboutissage par la forme d'emboutissage (15) d'une presse à emboutir (7) dans les limites admissibles par le panneau (11). L'ébauche (19) du panneau (11) épouse sensiblement la forme (8) d'une matrice (9). A ce stade, l'ébauche (11) est étirée ou emboutie. Il en résulte que la coupe de l'ébauche est uniformément déformée de façon minimale, ce qui permet de produire, à la presse, un panneau d'aile (1) en alliage d'aluminium caractérisée par une grande dimension plane L. L'invention permet ainsi un formage à la presse de panneaux (11) avec une souplesse accrue dans le choix des formes.
Gowling Lafleur Henderson Llp
Toyota Jidosha Kabushiki Kaisha
LandOfFree
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