B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 28/28 (2006.01) B21C 37/29 (2006.01) B21D 26/02 (2006.01)
Patent
CA 2556070
The aim of the invention is to allow for the production of a hollow profile (3) using secondary forming elements and/or junctions (4), wherein the cover (11) of the secondary forming element and/or junction (4) can be removed in a simple and reliable manner. For this purpose, the cover (11) of the secondary forming element and/or the junction (4) is removed under internal high pressure that does not exceed the forming pressure for producing the hollow profile (3) from the blank, the removal being brought about by the sole lift of the counter-mold (5, 17) that acts in the direction opposite to the direction of expansion of the hollow profile (3). The face (8) of the counter- mold (5, 17) is a continuous even structure, and the end edge (12, 21) of the mold (5, 17) forms the contour of separation. The width of the annular gap (22) between the wall (14) of the passage (7) produced by the forming tool (2) in which the mold (5, 17) is displaceably guided and the mold circumference (13) corresponds approximately to the wall thickness of the secondary forming element or junction (4).
La présente invention vise à permettre la production d'un profilé creux (3) au moyen d'éléments et/ou de jonctions secondaires de formation (4), dans lequel l'enveloppe (11) de l'élément et/ou la jonction secondaire de formation (4) peut être enlevé(e) d'une manière simple et fiable. A cet effet, l'enveloppe (11) de l'élément et/ou de la jonction secondaire de formation (4) est enlevé(e) sous pression interne élevée qui ne dépasse pas la pression de formation pour la production du profilé creux (3) à partir de l'ébauche, le retrait étant effectué par le seul levage du contre-moule (5, 17) qui agit dans le sens opposé de l'expansion de profil creux (3). La face (8) du contre-moule (5, 17) est une structure uniforme continue, et le bord d'extrémité (12, 21) du moule (5, 17) forme un contour de séparation. La largeur de l'espace annulaire (22) entre la paroi (14) du passage (7) produit par l'outil de formation (2) dans lequel le moule est guidé en déplacement et la circonférence du moule (13) correspond plus ou moins à l'épaisseur de paroi de l'élément et/ou la jonction secondaire de formation (4).
Griskiewitz Thomas
Koelln Joerg
Schult Jens
Daimlerchrysler Ag
Kirby Eades Gale Baker
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