Method for producing press-formed product
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United States of America Patent
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Jun 7, 2016
Grant Date -
Aug 8, 2013
app pub date -
Sep 30, 2011
filing date -
Sep 30, 2010
priority date (Note) -
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status (Latency Note)
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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.
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