B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 25/00 (2006.01) B21D 11/02 (2006.01) B21D 22/00 (2006.01) B21D 22/20 (2006.01) B21D 22/22 (2006.01) B21D 22/26 (2006.01) B21D 24/00 (2006.01) B21D 24/02 (2006.01) B21D 24/04 (2006.01) B21D 25/02 (2006.01)
Patent
CA 2164999
The present invention relates to a stretch controlled forming mechanism and method for preventing uncontrolled stretching, wrinkling, or splitting of blanks during forming. Specifically, a stretch controlled forming mechanism is provided that, in accordance with the present invention, forms and locks the blank between opposed die surfaces along selected portions thereof. Such locking prevents continued flow of material in those areas during the remainder of the formation process. Thus, with the selected areas restricted from further material flow, the portion of the blank not previously formed can be formed between opposed dies, without damage to the selected seams or the remaining material of the blank.
La présente invention concerne un mécanisme pour contrôler l'étirage dans une machine à emboutir, ainsi qu'une méthode pour prévenir l'étirage, le plissage ou le clivage des flans durant l'emboutissage. Plus précisément, le mécanisme de contrôle de l'étirage proposé dans la présente forme et bloque le flan entre les surfaces opposées de la matrice et du poinçon en différents points stratégiques de celles-ci. Le blocage des flans prévient la dispersion de matière dans certaines directions données durant l'emboutissage. La dispersion de matière ainsi stoppée, les régions du flan non encore formées peuvent être soumises à l'emboutissage sans risque d'endommager les joints ou la portion formée du flan.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Ogihara America Corporation
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