# US 2022/0274151 A1 · Tool of press forming

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- Number: US 2022/0274151 A1
- Document ID: US20220274151A1
- Status: Published application
- Kind: A1
- Application number: 17/765,669
- Filed: 2020-08-25
- Published: 2022-09-01
- Earliest claimed: 2019-11-20
- Assignees: Jfe Steel Corporation
- Applicants: Jfe Steel Corporation
- Inventors: Yasuhiro KISHIGAMI
- Web page: https://patentgrep.com/patent/US20220274151A1

## CPC

- B21D 22/26: for making peculiarly, e.g. irregularly, shaped articles
- B21D 37/01: Selection of materials
- B21D 22/02: Stamping using rigid devices or tools
- B21D 22/04: for dimpling (combined with perforating B21D28/24)
- B21D 22/20: Deep-drawing (special deep-drawing arrangements in, or in connection with, presses B21D24/00)
- 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 press forming tool includes: a punch; and a die, and press forms a press forming product including a punch bottom and a shallow concave portion or a low convex portion in the punch bottom. The punch includes a punch bottom forming surface, a concave shape forming portion or a convex shape forming portion, and a low Young's modulus member installation region formed under the punch bottom forming surface and accommodating a low Young's modulus member having a lower Young's modulus than that of the punch bottom forming surface. The low Young's modulus member installation region includes an area directly under the concave shape forming portion or the convex shape forming portion of the punch and has a projected area in a press forming direction that is 110% or greater as large as a projected area of the concave shape forming portion or the convex shape forming portion.

## Claims

### Claim 1

A press forming tool comprising:
a punch; and
a die,
wherein the press forming tool is configured to press form a press forming product including a punch bottom and a shallow concave portion or a low convex portion in the punch bottom,
the punch includes
a punch bottom forming surface to form the punch bottom,
a concave shape forming portion to form the concave portion or a convex shape forming portion to form the convex portion in the punch bottom forming surface, and
a low Young's modulus member installation region formed under the punch bottom forming surface and accommodating a low Young's modulus member having a lower Young's modulus than that of the punch bottom forming surface, and
the low Young's modulus member installation region includes an area directly under the concave shape forming portion or the convex shape forming portion of the punch and has a projected area in a press forming direction that is 110% or greater as large as a projected area of the concave shape forming portion or the convex shape forming portion.