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US 10,695,814 B2Granted
Method for manufacturing press-formed product, device for manufacturing press-formed product, mandrel, and press-formed product
AssigneeNippon Steel Corporation
InventorsJun Nitta, Tohru Yoshida, Hiroshi Yoshida, Nobuo Yoshikawa, Shigeru Yonemura
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a press-formed product includes: a first step of preparing a long material having a bending portion; and a second step of decreasing curvature of the bending portion while restricting both ends of the long material in a longitudinal direction.
Claims9
A method for manufacturing a press-formed product, comprising:
- a first step of preparing a long material having an elongated web portion and a vertical wall portion, the elongated web portion having a bending portion, the long material being the press-formed product, the long material having distal end surfaces;
- and
- a second step of compressing the bending portion in a longitudinal direction by decreasing curvature of a concave side of the bending portion while restricting both ends of the long material in the longitudinal direction at the distal end surfaces of the vertical wall portion and by increasing a cross-sectional area of the long material.
Dependencies are inferred from the claim text.