Verfahren zur Herstellung eines Pressgeformten Produkts, Pressgeformtes Produkt und Pressformverfahren

Details

Veröffentlichungs-Nr.

EP4772291

Anmeldetag

25. Juni 2024

Veröffentlichung

24. April 2025

Rechtsraum

EP

IPC

B21D22/26

Abstract

The present invention provides a technology that improves productivity while inhibiting defects in forming a high-strength steel sheet. A method for manufacturing a press-formed product of the present invention is a method for manufacturing, by press forming a blank sheet, a press-formed product having a top portion that has an outer peripheral edge including a curved portion, a vertical wall continuous with the outer peripheral edge of the top portion, and a flange continuous with the vertical wall, the method being characterized in that a step of forming a curved vertical wall portion of the vertical wall continuous with the curved portion includes: a preforming step of forming a stepped curved vertical wall portion of which a lower vertical wall portion from a step provided at a predetermined position in a height direction of the curved vertical wall portion to the flange projects toward the flange relative to an upper vertical wall portion from the step to the top portion; and a main forming step of smoothing out the stepped curved vertical wall portion into a flat curved vertical wall portion using a die having a cam structure.

Anmelder

Firma

JFE Steel Corporation

Land

🇯🇵 Japan

Fachgebiete