Title:
PRECISION FORGING METHOD, PRECISION FORGING DEVICE, AND PRECISION FORGING PRODUCT
Document Type and Number:
WIPO Patent Application WO/2020/218377
Kind Code:
A1
Abstract:
This precision forging method includes disposing a metal material (10) in a die hole 22 so that the tip surface of a peripheral wall (14) of the metal material (10) faces a stopper (24) and a bottom section (12) of the metal material (10) faces a punch (30). In addition, this precision forging method includes moving the punch 30 having a cutting edge (32) on an edge section of a processing end surface (31) inside the die hole (22), thereby cuts a portion of a wall part (14) in a thickness direction by the cutting edge (32), and generates shear deformation in the cut portion.
Inventors:
WANG ZHIGANG (JP)
Application Number:
PCT/JP2020/017392
Publication Date:
October 29, 2020
Filing Date:
April 22, 2020
Export Citation:
Assignee:
NATIONAL UNIV CORPORATION TOKAI NATIONAL HIGHER EDUCATION AND RESEARCH SYSTEM (JP)
International Classes:
B21J5/06; B21J13/02; B21K21/08
Foreign References:
| JPH0538546A | 1993-02-19 | |||
| JPS56141935A | 1981-11-05 | |||
| JPH0455034A | 1992-02-21 | |||
| JPS61255740A | 1986-11-13 | |||
| JPH0455034A | 1992-02-21 | |||
| JPS61255740A | 1986-11-13 |
Other References:
ZHI GANG WANGWEN ZHENG DONGHIROYASU YATOU: "A new forming method of flange on a drawn cup by plate forging", PROCEDURE MANUFACTURING, vol. 15, 2018, pages 955 - 960
"Metal Forming", 17TH INTERNATIONAL CONFERENCE ON METAL FORMING, 16 September 2018 (2018-09-16), Retrieved from the Internet
See also references of EP 3960328A4
"Metal Forming", 17TH INTERNATIONAL CONFERENCE ON METAL FORMING, 16 September 2018 (2018-09-16), Retrieved from the Internet
See also references of EP 3960328A4
Attorney, Agent or Firm:
ONDA Makoto et al. (JP)
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