Method for producing press-formed product
AssigneeKabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
InventorsJunya Naitou, Keisuke Okita, Shushi Ikeda
Life of this patent
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Abstract
There is provided a useful method for producing a press-formed product without making the structure of a press tool complicated, which product has favorable formability in a level so as to be able to be produced by deep drawing, and which product is produced by press-forming a thin steel sheet with a punch and a die, in which the thin steel sheet is heated to a temperature not lower than an Ac3 transformation point thereof, and the press-forming is then started, wherein the forming is carried out so that a temperature difference in the thin steel sheet is adjusted to be not higher than 200° C. at a stage when the thin steel sheet has reached one third of a forming height.
Claims6
A method for producing a formed product by press-forming a thin steel sheet with a punch and a die, comprising:
- heating the thin steel sheet to a temperature not lower than an Ac3 transformation point thereof;
- and
- then starting the press-forming,
- wherein the forming is carried out so that a temperature difference in the thin steel sheet is adjusted to be not higher than 200° C. at a stage when the thin steel sheet has reached one third of a forming height.
Dependencies are inferred from the claim text.