Press forming die assembly

The invention relates to a die for press forming, wherein a panel (20) of a blank material (10) is formed by the press forming die. The press forming die comprises draw beads for controlling the amount of the blank material flowing into a draw forming portion during the press forming. The draw heads...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SAKURAI TAKESHI, MURAKAMI SHINICHI, HASEGAWA TOMIO, OKUZUMI SHIYOUHEI, SERA TAKASHI
Format:	Patent
Sprache:	chi ; 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:	The invention relates to a die for press forming, wherein a panel (20) of a blank material (10) is formed by the press forming die. The press forming die comprises draw beads for controlling the amount of the blank material flowing into a draw forming portion during the press forming. The draw heads comprises a conventional first draw bead (in accordance with a first bead (15)) and a second draw bead (in accordance with a second bead (16)) in a direction intersecting the first draw bead. The second draw bead is provided so that strain (fold) occurring at a thick sheet portion (11) in a shrink forming of a flange portion (23) is not transmitted to a thin sheet portion (12), thereby inhibiting the rotary of the thick sheet portion (11).