PRESS-FORMING DIE

PROBLEM TO BE SOLVED: To provide a press-forming die having simple structure with a holding force having no risk of fluctuating. SOLUTION: A blank holder 20 is divided into a first blank holder 23 having a fixed bead 21 and a second blank holder 25 having a movable bead 26. A pad 32 having an elasti...

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Bibliographic Details
Main Authors MAEDA SHINGO, ISHIHARA YOSHIMITSU, NAKAMURA TAKESHI, KITANO YASUHIKO
Format Patent
LanguageEnglish
Published 21.08.2008
Subjects
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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Summary:PROBLEM TO BE SOLVED: To provide a press-forming die having simple structure with a holding force having no risk of fluctuating. SOLUTION: A blank holder 20 is divided into a first blank holder 23 having a fixed bead 21 and a second blank holder 25 having a movable bead 26. A pad 32 having an elastic body 35 is arranged in and opposite to the second blank holder 25. The holding force of the second blank holder is shared by the second bead and a second holder face. As a result, holding force is not concentrated on the second bead, and the wear of the second bead can be considerably reduced. Since the second bead is formed on a part of the second blank holder, displacement of only the second bead with respect to other members does not occur. As a result, inconvenient fluctuation in the holding force can be eliminated. COPYRIGHT: (C)2008,JPO&INPIT
Bibliography:Application Number: JP20070025539