Method for manufacturing press molded product

Patent metadata

Field	Value
Publication number	US-11292046-B2
Application number	US-201816626103-A
Country	US
Kind code	B2
Filing date	May 29, 2018
Priority date	Jun 28, 2017
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A method for manufacturing a press molded product includes forming a plurality of corner portions in a pressed portion of a pressed member, providing the pressed member between a first die and a second die, and press molding the pressed portion to decrease a height of the pressed portion. The press molding includes forming a pair of first bent portions in the pressed portion by means of the corner portions, the pair of first bent portions being bent to protrude toward the second die, forming a second bent portion in the pressed portion by means of the corner portions while holding the pair of first bent portions by a pair of holding portions, the second bent portion being bent to protrude toward the first die from a position between the pair of first bent portions, and pressing and deforming the second bent portion.

First claim

The invention claimed is:

1. A method for manufacturing a press molded product by press molding a pressed portion that has a bent shape including a substantially horizontal linear portion and a pair of opposing substantially vertical portions extending from opposing ends of the linear portion such that the pressed portion has a height in the vertical direction, the pressed portion being formed in a pressed member having a plate shape, the method comprising:
forming a plurality of corner portions in the pressed portion, the corner portions each comprising a bend and disposed between the substantially horizontal linear portion and each of the substantially vertical linear portions;
providing the pressed member, having the corner portions formed in the pressed portion, between a first die and a second die; and
press molding the pressed portion by relatively moving the first die and the second die toward each other to decrease the height of the pressed portion,
wherein the press molding includes
forming a pair of first bent portions in the pressed portion by bending at the corner portions, the pair of first bent portions being bent to protrude toward the second die,
forming a second bent portion in the pressed portion by bending at a portion between the corner portions while holding the pair of first bent portions by a pair of holding portions spaced apart from each other and disposed in the second die, each holding portion having a groove shape, the second bent portion being bent to protrude toward the first die from a position between the pair of first bent portions, and
pressing and deforming the second bent portion while holding the pair of first bent portions by the pair of holding portions, using a pressing portion of one of the first and second dies for bending the second bent portion such that the second bent portion protrudes toward the second die.

2. The method according to claim 1 , wherein in the press molding, the pressed portion is thickened.

3. The method according to claim 1 , wherein in the press molding, the pressed portion is press molded so that the pressed portion after being molded has a bent shape.

4. The method according to claim 1 , wherein in the press molding, peripheral portions of the pressed portion in the pressed member are clamped by the first die and the second die.

5. The method according to claim 1 , wherein the pressed member is formed by hot pressing.

Assignees

• Kobe Steel Ltd

Inventors

• Sakamoto Kazuki
• Hayashida Yasuhiro
• Watanabe Kenichi
• Kimura Takayuki

Classifications

• B21D24/00

  Special deep-drawing arrangements in, or in connection with, presses · CPC title

• B21D53/88

  other parts for vehicles, e.g. cowlings, mudguards · CPC title

• B21D22/24

  involving two drawing operations having effects in opposite directions with respect to the blank · CPC title

• B21D37/10

  Die sets; Pillar guides · CPC title

• B21D13/02

  by pressing · CPC title