Method for removing strain from press-formed workpiece, and forming press
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United States of America Patent
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Mar 1, 2005
Grant Date -
Aug 7, 2003
app pub date -
Feb 6, 2003
filing date -
Feb 7, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
In a forming press, a blank is pressed formed into a press-formed workpiece by means of an upper die and a lower die, while a peripheral edge portion of the blank is clamped by means of a die and a blank holder insert of the forming press. Subsequently, a central portion of the press-formed workpiece is partially held by means of the upper die and the lower die so as to draw a peripheral portion of the press-formed workpiece away from the central portion thereof, thereby removing strain from the press-formed workpiece.
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