FORMED ARTICLE PRODUCTION METHOD, BLANK, AND POLYGONAL TUBE DEEP DRAWING FORMED ARTICLE

A formed article having a polygonal tube shape is produced by performing polygonal tube deep drawing on a blank made of a steel sheet, the formed article including a bottom surface part having a polygonal shape, a side wall including a straight side part continuous with a side of the bottom surface...

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Bibliographische Detailangaben
Hauptverfasser:	Nakagawa, Kinya, Shinmiya, Toyohisa
Format:	Patent
Sprache:	eng
Schlagworte:	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:	A formed article having a polygonal tube shape is produced by performing polygonal tube deep drawing on a blank made of a steel sheet, the formed article including a bottom surface part having a polygonal shape, a side wall including a straight side part continuous with a side of the bottom surface part and a vertical ridge connecting ends, in the right-left direction, of adjacent straight side parts, and a flange continuous with the side wall. A side of a flange region to become the flange in the blank includes a notch, and the notch is formed on the side of a part of the flange region, the part being continuous with a region at a position closer to the vertical ridge than a position of a central part in the right-left direction in the straight side part.