Press forming method and shape evaluation method for press formed part
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United States of America Patent
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Sep 17, 2024
Grant Date -
Mar 30, 2023
app pub date -
Oct 2, 2020
filing date -
Oct 2, 2020
priority date (Note) -
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Abstract
A press forming method for controlling a shape change of a press formed part over time after the press formed part springs back at a moment of a release from a press-forming die includes: a press forming step of press forming a metal sheet into the press formed part by using the press-forming die; a die releasing step of releasing the press formed part, which is press-formed, from the press-forming die; and a post-release die holding step of holding the released press formed part in a forming bottom dead center shape for 30 minutes or more by using the press-forming die.
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