# US 10,245,634 B2 · Hat-shaped cross-section component manufacturing apparatus

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- Number: US 10,245,634 B2
- Document ID: US10245634B2
- Status: Granted
- Kind: B2
- Application number: 15/021,539
- Filed: 2014-09-18
- Published: 2016-08-04
- Granted: 2019-04-02
- Earliest claimed: 2013-09-24
- Assignees: Nippon Steel & Sumitomo Metal Corporation
- Applicants: Nippon Steel & Sumitomo Metal Corporation
- Inventors: Yasuharu Tanaka; Toshimitsu Aso; Takashi Miyagi; Misao Ogawa; Shinobu Yamamoto
- Web page: https://patentgrep.com/patent/US10245634B2

## CPC

- B21J 5/02: Die forging; Trimming by making use of special dies {; Punching during forging}
- B21D 22/26: for making peculiarly, e.g. irregularly, shaped articles
- B21D 24/02: Die-cushions
- B21D 24/04: Blank holders; Mounting means therefor
- B21D 53/88: other parts for vehicles, e.g. cowlings, mudguards
- B21J: FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES (rolling of metal B21B; making particular products by forging or pressing B21K; cladding or plating B23K; finishing surfaces by hammering B23P9/04; compacting surfaces by blasting with particulate material B24C1/10; general features of presses, presses for consolidating scrap B30B; furnaces in general F27)
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)

## 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.

## Claims

### Claim 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.

### Claim 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.

### Claim 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.

### Claim 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.