A METHOD FOR IMPROVING THE HEMMABILITY OF AGE-HARDENABLE ALUMINUM SHEET

An improved method of forming a severe bend (20) or a hem in a sheet (10) of wrought aluminum age-hardened and age-hardenable alloy includes heating the region (22) to be bent or hemmed to a temperature above about 250.degree.C for a period of seconds and then quenching the heated region to remove t...

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Bibliographische Detailangaben
Hauptverfasser:	KRAJEWSKI, PAUL EDWARD, RYNTZ, EDWARD FRANK JR
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	An improved method of forming a severe bend (20) or a hem in a sheet (10) of wrought aluminum age-hardened and age-hardenable alloy includes heating the region (22) to be bent or hemmed to a temperature above about 250.degree.C for a period of seconds and then quenching the heated region to remove the age-hardening effect and thereafter accomplishing the bend (20) or hem before age hardening of the heated region occurs.