Method for sliver elimination in shearing aluminum sheet

C - Chemistry – Metallurgy – 22 – F

Patent

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Details

C22F 1/04 (2006.01) B23P 25/00 (2006.01) B26D 7/10 (2006.01) C22F 1/047 (2006.01) C22F 1/053 (2006.01) C22F 1/057 (2006.01)

Patent

CA 2286055

Age-hardened aluminum alloy sheet (18) can be subjected to a shearing operation, such as trimming or piercing, with reduced sliver formation by first heating the region to be sheared to a temperature above about 250 ~C, immediately quenching the heated region to soften the region, and then performing the shearing operation in the softened region before age-hardening occurs.

On décrit une feuille en alliage d'aluminium durci par vieillissement (18) pouvant être soumise à une opération de cisaillement, telle que l'ébarbage ou le poinçonnage, avec une formation limitée d'argent. Pour ce faire, la partie à cisailler est d'abord chauffée à une température supérieure à 250 ·C; la partie chauffée est ensuite immédiatement trempée pour l'amollir; l'opération de cisaillement est enfin réalisée sur la partie ramollie avant le procédé de vieillissement.

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