US 10,946,427 B2Granted

Blank, forming plate, press formed article manufacturing method, and press formed article

AssigneeNippon Steel Corporation

InventorsTakashi Miyagi, Kei Misawa, Yasuharu Tanaka, Misao Ogawa, Toshimitsu Aso

Life of this patent

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Abstract

A blank that is a material for an elongated press formed article having a substantially hat shaped lateral cross-section profile including a top plate section, a ridge line section, a flange section, and vertical wall section, and configured with a first portion in which the top plate section has a fixed width, and a second portion including a curved portion in which the top plate section exhibits an L-shape in plan view due to the vertical wall section, the ridge line section, and the flange section curving along with the width of the top plate section gradually increasing. The blank has a shape of an opened-out shape of the press formed article, additionally with a first recess, a protrusion, and a second recess provided to an edge of an excess portion additionally provided at an edge of a location that will form the flange section configuring the curved portion.

Claims13

Dependent claims

A flat plate shaped blank that is in an opened out shape, the flat plate shaped blank comprising:

an excess portion of the flat plate shaped blank in the opened out shape, and
portions corresponding to a top plate section, a vertical wall section and a flange section, respectively, the flange section having a curved-line flange portion corresponding to a curved portion of the top plate section;
wherein the excess portion bulges out from the portion corresponding to the flange section and has a first recess and a second recess with a negative sign curvature on either side of a protrusion with a positive sign curvature when taking a curvature in a direction toward the inside of the flat plate shaped blank as having a negative sign and taking a curvature in the opposite direction to toward the inside of the flat plate shaped blank as having a positive sign, and bulges out from the portion corresponding to the flange section;
and
the protrusion is located in an outer edge of the curved-line flange portion.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/890,227Filed 13 May 2014
Priority: JP JP2013-10141913 May 2013
Published: US 2016/0082495 A124 Mar 2016
Granted: 16 Mar 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

B21D 22/02
Shaping without cutting, by stamping, spinning, or deep-drawing: stamping using rigid devices or tools
B21D 22/22
Deep-drawing: with devices for holding the edge of the blanks
B21D 22/26
Deep-drawing: for making peculiarly, e.g. irregularly, shaped articles
B21D 53/88
Making other particular articles: other parts for vehicles, e.g. cowlings, mudguards