Method of forming internal flange on sheet metal part

The method involves a flange first being formed in a sheet metal part e.g. by drawing. The part is next supported on a base (30) on which its edge (13) is restrained by a stepped edge (31) of the base. A press die (40) is next lowered over the edge (42) of the flange. The press die has an annular gr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	FUJI, NAOKI, KOBE, HYOGO, JP, HARADA, KUNIHIRO, MIKI, HYOGO, JP, KANEMITSU, TOSHIAKI, KOBE, HYOGO, JP
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	The method involves a flange first being formed in a sheet metal part e.g. by drawing. The part is next supported on a base (30) on which its edge (13) is restrained by a stepped edge (31) of the base. A press die (40) is next lowered over the edge (42) of the flange. The press die has an annular groove with sloping side faces (41,43) which is moved down over the flange. While the die is lowered, the material of the flange flows and takes up the shape of the cross section of the annular groove. The resulting flange is thicker than the original flange of sheet metal.