Draw forming method and device

Details Draw forming method and device Draw forming method and device

B - Operations, Transporting

21

D

B21D 24/04 (2006.01) B21D 22/22 (2006.01)

Patent

CA 2586049

A draw forming method for drawing a blank material (15). In this method, a restraint region (98) that is an outer peripheral section (21) of the blank material is held by a first holder means (22), and then a tension region (97) inside the outer peripheral section is displaced upward by a second holder means (23) relative to the restraint region. The displacement applies tensile force to a drawing region (96) that is the central section of the blank material.

La présente invention décrit un procédé de formation d'étirement, permettant d'étirer un matériau vide (15). Dans ce procédé, une région de limitation (98), qui est une section périphérique extérieure (21) du matériau vide, est maintenue par un premier moyen de support (22) ; une région de tension (97) située dans la section périphérique extérieure est déplacée vers le haut par un second moyen de support (23) relativement à la région de limitation. Le déplacement applique une force de traction à une région d'étirement (96) qui correspond à la section centrale du matériau vide.

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