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Method For Manufacturing Metallic Member, Mold, And Metallic Member

Abstract: Provided is a method for manufacturing a metallic member having excellent corrosion resistance on a cut end surface thereof. This method for manufacturing a metallic member is a method for manufacturing a metallic member by punching, with a mold (20), a metal plate (10) having front and rear surfaces coated with a coating layer. The mold (20) includes a punch (21), a counter pad (22), holddowns (23), and dies (24). The holddowns (23) each have a protruding portion (231) at an inner peripheral edge section of a surface facing the metal plate (10), the protruding portion (231) of each of the holddowns (23) has a shoulder portion having a radius R1 of curvature on an inner circumference side, and the radius R1 of curvature is at least 0.10 times the thickness of the metal plate (10). The manufacturing method comprises: a step for pushing the protruding portion (231) of the holddown (23) into the metal plate (10); and a step for bringing the punch (21) and the dies (24) closer to the metal plate (10) to punch the metal plate (10).

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
24 October 2024
Publication Number
51/2024
Publication Type
INA
Invention Field
MECHANICAL ENGINEERING
Status
Email
Parent Application

Applicants

NIPPON STEEL CORPORATION
6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Inventors

1. NORITA, Katsunari
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
2. SASAKI, Hirokazu
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
3. ISSAKA, Hameed
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

# Name Date
1 202417081081-STATEMENT OF UNDERTAKING (FORM 3) [24-10-2024(online)].pdf 2024-10-24
2 202417081081-REQUEST FOR EXAMINATION (FORM-18) [24-10-2024(online)].pdf 2024-10-24
3 202417081081-PROOF OF RIGHT [24-10-2024(online)].pdf 2024-10-24
4 202417081081-POWER OF AUTHORITY [24-10-2024(online)].pdf 2024-10-24
5 202417081081-FORM 18 [24-10-2024(online)].pdf 2024-10-24
6 202417081081-FORM 1 [24-10-2024(online)].pdf 2024-10-24
7 202417081081-FIGURE OF ABSTRACT [24-10-2024(online)].pdf 2024-10-24
8 202417081081-DRAWINGS [24-10-2024(online)].pdf 2024-10-24
9 202417081081-DECLARATION OF INVENTORSHIP (FORM 5) [24-10-2024(online)].pdf 2024-10-24
10 202417081081-COMPLETE SPECIFICATION [24-10-2024(online)].pdf 2024-10-24
11 202417081081-FORM 3 [25-03-2025(online)].pdf 2025-03-25