Hat-shaped cross-section component manufacturing apparatus

Patent metadata

Field	Value
Publication number	US-10245634-B2
Application number	US-201415021539-A
Country	US
Kind code	B2
Filing date	Sep 18, 2014
Priority date	Sep 24, 2013
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A hat-shaped cross-section component manufacturing apparatus includes: a die that includes a forming face that grips and presses a metal stock sheet; a blank holder, that includes a forming face that grips and presses the metal stock sheet so as to configure a forming face corresponding to the forming face of the die, a pad that is disposed inside the opening formed in the die, and that includes a forming face that grips and presses the metal stock sheet; and a punch that is disposed facing the pad and that includes a forming face that grips and presses the metal stock sheet so as to configure a forming face corresponding to the forming face of the pad. The hat-shaped cross-section component manufacturing apparatus further includes a pressure limiting device that limits a formed curving component from being pressed between the pad and the blank holder during demolding.

First claim

The invention claimed is:

1. A hat-shaped cross-section component manufacturing apparatus comprising:
a die that includes a forming face that presses both side portions of a metal sheet, and that includes an opening disposed between both side portions of the forming face of the die;
a punch that is disposed facing the opening of the die, wherein the punch is disposed inside the opening when a mold is closed, and wherein the punch includes a forming face that presses a central portion of the metal sheet;
a pad that is disposed inside the opening formed in the die, wherein the pad includes a forming face that presses and grips the central portion of the metal sheet against the punch when the mold is closed so as to configure a forming face corresponding to the forming face of the punch;
a holder that is disposed facing the die, wherein the holder includes a forming face that presses and grips both side portions of the metal sheet against the die when the mold is closed so as to configure a forming face corresponding to the forming face of the die; and
a pressure limiting device that limits a formed hat-shaped cross-section component with a hat-shaped cross-section profile from being pressed between the pad and the holder during demolding, wherein
the pressure limiting device limits relative movement of the holder toward a die side with respect to the punch, when the punch disposed inside the opening and the die are separated from each other.

2. A hat-shaped cross-section component manufacturing apparatus comprising:
a die that includes a forming face that presses both side portions of a metal sheet, and that includes an opening disposed between both side portions of the forming face of the die;
a punch that is disposed facing the opening of the die, wherein the punch is disposed inside the opening when a mold is closed, and wherein the punch includes a forming face that presses a central portion of the metal sheet;
a pad that is disposed inside the opening formed in the die, wherein the pad includes a forming face that presses and grips the central portion of the metal sheet against the punch when the mold is closed so as to configure a forming face corresponding to the forming face of the punch;
a holder that is disposed facing the die, wherein the holder includes a forming face that presses and grips both side portions of the metal sheet against the die when the mold is closed so as to configure a forming face corresponding to the forming face of the die; and
a pressure limiting device that limits a formed hat-shaped cross-section component with a hat-shaped cross-section profile from being pressed between the pad and the holder during demolding, wherein
the pressure limiting device includes a coupling portion that fixes a positional relationship between the pad and the holder by coupling the pad and the holder together.

3. A hat-shaped cross-section component manufacturing apparatus comprising:
a die that includes a forming face that presses both side portions of a metal sheet, and that includes an opening disposed between both side portions of the forming face of the die;
a punch that is disposed facing the opening of the die, wherein the punch is disposed inside the opening when a mold is closed, and wherein the punch includes a forming face that presses a central portion of the metal sheet;
a pad that is disposed inside the opening formed in the die, wherein the pad includes a forming face that presses and grips the central portion of the metal sheet against the punch when the mold is closed so as to configure a forming face corresponding to the forming face of the punch;
a holder that is disposed facing the die, wherein the holder includes a forming face that presses and grips both side portions of the metal sheet against the die when the mold is closed so as to configure a forming face corresponding to the forming face of the die; and
a pressure limiting device that limits a formed hat-shaped cross-section component with a hat-shaped cross-section profile from being pressed between the pad and the holder during demolding, wherein
the pressure limiting device includes a holder side limiting section that limits movement of the holder toward a die side during demolding, and the holder side limiting section is a fixing tool that fixes the holder to the punch.

4. A hat-shaped cross-section component manufacturing apparatus comprising:
a die that includes a forming face that presses both side portions of a metal sheet, and that includes an opening disposed between both side portions of the forming face of the die;
a punch that is disposed facing the opening of the die, wherein the punch is disposed inside the opening when a mold is closed, and wherein the punch includes a forming face that presses a central portion of the metal sheet;
a pad that is disposed inside the opening formed in the die, wherein the pad includes a forming face that presses and grips the central portion of the metal sheet against the punch when the mold is closed so as to configure a forming face corresponding to the forming face of the punch;
a holder that is disposed facing the die, wherein the holder includes a forming face that presses and grips both side portions of the metal sheet against the die when the mold is closed so as to configure a forming face corresponding to the forming face of the die; and
a pressure limiting device that limits a formed hat-shaped cross-section component with a hat-shaped cross-section profile from being pressed between the pad and the holder during demolding, wherein
the pressure limiting device includes a pad side limiting section that limits movement of the pad toward a punch side during demolding, and the pad side limiting section is a fixing tool that fixes the pad to the die.

Assignees

• Nippon Steel & Sumitomo Metal Corp

Inventors

• Tanaka Yasuharu
• Aso Toshimitsu
• Miyagi Takashi
• Ogawa Misao
• Yamamoto Shinobu

Classifications

• B21D53/88

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

• B21D24/04

  Blank holders; Mounting means therefor · CPC title

• B21D22/26 Primary

  for making peculiarly, e.g. irregularly, shaped articles · CPC title

• B21D24/02

  Die-cushions · CPC title

• B21J5/02 Primary

  Die forging; Trimming by making use of special dies {; Punching during forging} · CPC title