Stretch-forming machine and method

Details Stretch-forming machine and method Stretch-forming machine and method

B - Operations, Transporting

21

D

B21D 11/02 (2006.01)

Patent

CA 2628302

A stretch-forming machine of the type wherein a pair of opposed curving jaw assemblies grip opposite end edge portions of a metal sheet for initially stretching the metal sheet into a yield state and forming the metal sheet into a predetermined curved configuration. The pivot and the actuator cooperate to stretch the outer corners of the metal sheet while substantially minimizing elongation along the centerline of the metal sheet.

L'invention concerne un appareil de formage par étirage, du type dans lequel deux ensembles mâchoires de cintrage opposés saisissent des parties périphériques d'extrémité opposées d'une feuille métallique afin de conférer à la feuille un état d'élasticité par étirage initial, et de façonner la feuille pour lui conférer une configuration cintrée préétablie. Le pivot et l'actionneur coopèrent pour étirer les angles extérieurs de la feuille métallique tout en limitant sensiblement l'allongement le long de la ligne médiane de la feuille.

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