B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 26/02 (2006.01)
Patent
CA 2526774
The invention relates to a method for producing a peripherally closed hollow profiled element by means of internal high-pressure forming. According to said method, a hollow longitudinal blank (5) is inserted into an internal high- pressure form tool (1) and, during the closing process of the form tool (1), the blank (5) which is fully inserted thereinto is compressed in a region between the two ends (9,10) thereof, whereafter the compressed blank (5) is enlarged into the end shape of the hollow profiled element by means of fluidic internal high pressure. The aim of the invention is to enable a reliable production of the hollow profiled element even in the event of large deformation of the hollow profiled blank (5) resulting during the closing of the form tool (1). To this end, the ends (9,10) of the blank (5) are cut before the compression process, respectively forming a bevelled front surface (12,13), and the cut contour of the ends (9,10) and the bevelling angle (.alpha.) are selected in such a way that the ends (9,10) are deformed by means of the compression process such that the front surfaces (12,13) thereof have an essentially plane form and assume a position that is as perpendicular as possible to the longitudinal extension of the blank (5).
L'invention concerne un procédé de fabrication d'un profilé creux fermé périphériquement par formage haute pression intérieur, consistant à loger une ébauche longitudinale creuse (5) dans un outil de formage haute pression intérieur (1), et à comprimer, au cours du processus de fermeture de l'outil de formage (1), l'ébauche logée entièrement dans l'outil de formage (5) dans une zone située entre les extrémités de ladite ébauche (9, 10), l'ébauche comprimée (5) étant élargie par haute pression intérieure fluidique dans sa forme finale de profilé creux. L'invention vise à mettre en oeuvre une fabrication sure du profilé creux, même dans le cas de déformations par compression élevées de l'ébauche (5) survenant lors de la fermeture de l'outil de formage (1). A cet effet, les extrémités (9, 10) de l'ébauche (5) sont coupées avant le processus de compression de manière à former une surface frontale biseautée respective (12, 13), et le contour de coupe des extrémités (9, 10) et l'angle de biseautage (.alpha.) sont choisis de telle manière que les extrémités (9, 10) sont déformées au cours du processus de compression de façon que leurs surfaces frontales (12, 13) présentent une forme essentiellement plane et prennent une position essentiellement perpendiculaire à l'extension longitudinale de l'ébauche (5).
Linke Gerhard
Schroeder Matthias
Schult Jens
Daimlerchrysler Ag
Kirby Eades Gale Baker
LandOfFree
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